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SoMat eDAQ-lite

1. HBM 4 8 1 Using Remote Control with a Network 82 5 eDAQ lite Hardware 83 5 1 ELCPU Base Processor 83 5 1 1 Available Inputs 83 5 1 2 Configuration Options 83 5 2 ELDIO Digital Input Output Layer 84 5 2 1 Available Inputs and Outputs 85 5 2 2 Configuration Options 86 5 3 EGPS 5HZ SoMat GPS Receiver 88 5 3 1 Available Inputs 88 5 3 2 Configuration Options 89 5 4 Vehicle Bus Module 89 5 4 1 Available Inputs 89 5 4 2 Configuration Options 90 5 5 ELBRG Bridge Layer 90 5 6 ELHLS High Level Analog Layer 91 5 7 SMART Modules 91 5 8 ELNTB Non lsolated Thermocouple Layer 92 6 Input Channels 95 6 1 Common Input Channel Parameters 95 6 1 1 Desired Measurement 95 6 1 2 Output Sample Rate 96 6 1 3 Full Scale Values 96 6 1 4 Output Data Type 96 6 1 5 Calibration Table 96 6 1 6 Prerun Rezero 97 6 1 7 Display Control 98 6 12773 2 0 en SoMat eDAQ lite HBM 6 2 Digital Input Channels 98 6 2 1 Digital Input 98 6 2 2 Pulse Counter 99 6 3 Analog Input Channels 101 6 3 1 Bridge 101 6 3 2 Simultaneous High Level 104 6 4 SMART Module Input Channels 105 6 4 1 SMSTRB4 Strain SMART Module 106 6 4 2 SMITC Thermocouple SMART Module 108 6 5 Temperature Input Channels 108 6 5 1 Thermocouple 108 6 6 Bus Oriented Input Channels 108 6 6 1 Common Bus Channel Parameters 109 6 6 2 Vehicle Bus Message Channel 110 6 7 Simulation Input
2. 12 5 1 Transducer Cable for VPW Interface The following table lists the pinouts for the SAC TRAN MP cable when used with the VPW interface Tp NOTE N A a Always provide the 12 volt REF voltage for the VPW module to function 5 Function Pin Wire Color 4 x gt 4 VPW_bus 2 White 1 D lt gt M F AGnd 3 bare wire 6 12 VREF 5 Red 2 12 5 2 Transducer Cable for J1708 LIN BUS Interface The following table lists the pinouts for the SAC TRAN MP when used with the J1708 LIN interface Connect to either the LIN_BUS pin or the J1708 pins but not both Vly NOTE N ah a Always provide the 12 volt REF voltage for the J1708 LIN module to function H _ Pa i 5 Function Pin Wire Color 4 x gt 4 LIN_BUS 1 Brown 1 i D D J1708_A 2 White 6 AGnd 3 bare wire 12 V REF 5 Red J1708_B 6 Green 12 5 3 Transducer Cable for CAN SWC Interface The following table lists the pinouts for the SAC TRAN MP cable when used with the CAN SWC interface i y NOTE N L Connection to both the SWC pin and the CAN pins is allowed but only one source can p sj be used at any given time 12773 2 0 en 183 SoMat eDAQ lite HBM wir NOTE N N SWC operation is restricted to the EMCAN 04 version of the CAN VBM H 7 lt Vly NOTE N N a Always provide the 12 volt REF voltage for the SWC interface H d 5 Function Pin Wire Color 4 gt 4 SWC 1 Br
3. 8 3 6 152 Message Logger Use the Message Logger DataMode to store input message channels in the data file NOTE The Message Logger supports the PC Card data storage option only Input Channel The input channel is limited to message channel sources which are all 8 bit unsigned Peak Valley The Peak Valley DataMode stores multiple channels of peak and valley sequences in the output data file The eDAQ lite acquires peaks and valleys from triggered or un triggered time history data streams using the user specified hysteresis value and the peak valley processing algorithm For more information on the peak valley processing algorithm see Peak Valley Processing Algorithm on page 203 Input Channel The input channel data type must be 8 bit integer 16 bit integer or 32 bit float Data Type For 32 bit float input channels select one of three available formats for data storage and conversion Data Type Description 32 bit float No conversion is necessary Use the 32 bit float mode for computed channels where full scale estimates are uncertain or unknown 16 bit integer Maintain the resolution of both the 12 bit and 16 bit A D converters 8 bit integer Lose significant resolution in both the 12 bit and 16 bit A D converters Use the 8 bit integer mode only for a rough picture of channel behavior NOTE Using the integer data types requires that valid full scale minimum and maximum values are defined for each i
4. For more information on setting up a network node see Adding a Network Node on page 55 Hardware Setup The hardware setup window lists the hardware layers installed on the systems specified in the network setup Each layer entry includes the front panel connector ID names the layer serial number the firmware code version number an indication of applicable ECNs and select configuration details Use the Query button to populate the list Option Description Query Load the hardware setup from the systems specified as network nodes TCE issues a prompt if the queried hardware configuration differs from the current setup Config Display and or edit the configuration details for the selected hardware layer Configuration options are not available for all layers For more information on using TCE to configure hardware see Configuring the Hardware on page 56 For more information on the configuration options for specific hardware see eDAQ lite Hardware on page 83 Transducer Channel Setup Use the transducer channel window to define and modify the transducer configuration required for the test This includes defining transducer identification information user programmable settings and calibration methods and parameters Each transducer entry includes the transducer ID name the connector the transducer sample rate the calibration date the output data type and select configuration details 12773 2 0 en
5. 191 x SoMat eDAQ lite Sample Rate Hz Channel 25000 10000 2500 32768 819 2048 HLSS_1 c01 0 00 0 00 0 00 0 00 0 00 0 00 HLSS_1 c02 0 37 0 37 0 37 0 37 0 40 0 38 HLSS_1 c03 0 09 0 10 0 05 0 09 0 07 0 06 HLSS_1 c04 0 08 0 09 0 09 0 09 0 07 0 05 HLSS_2 c01 0 11 0 14 0 21 0 10 0 15 0 05 HLSS_2 c02 0 16 0 17 0 19 0 15 0 23 0 16 HLSS_2 c03 0 12 0 14 0 17 0 11 0 16 0 11 HLSS_2 c04 0 31 0 32 0 37 0 30 0 33 0 30 Brg_1 c01 1 65 1 64 1 68 1 60 1 60 1 57 Brg_1 c02 1 55 1 54 1 59 1 50 1 49 1 46 Brg_1 c03 1 42 1 42 1 45 1 38 1 37 1 38 Brg_1 c04 1 57 1 57 1 63 1 52 1 49 1 55 14 2 1 ELHLS and ELBRG Channel Synchronization For ELHLS and ELBRG channels the relative data synchronization across all channels in any given eDAQ lite stack is typically within a few microseconds All of these channels use the same type of Butterworth 8 pole analog guard filter which produces a delay of around 42 microseconds 2 microseconds The eDAQ lite compensates for this delay by using a fixed value of 40 microseconds for the 100 kHz MSR to pre start digital data sampling and align the digital data as close as possible to the actual sample rate clock Following is a histogram showing a typical distribution of data skews in microseconds for all EHLS channels and a variety of sample rates Note that the data skew for all channels at all sample rates is less than one microsecond which is typical for both ELHLS
6. 7 2 5 Pulse Counter Vly Pe P_ Sn The Pulse Counter computed channel is used to measure pulse frequencies primarily in conjunction with digital inputs Each FALSE to TRUE transition signifies the end of a pulse period and initiates an update of the current pulse frequency which is output at a user defined rate The pulse counter frequency also updates if the time period since the last transition exceeds the current pulse counter frequency output resulting in improved response as the pulse train slows or stops NOTE The current pulse frequency initializes to 0 Hz and remains at this initial value until two FALSE to TRUE transitions occur The accuracy of the pulse frequency measurements is dependent on the sample rate of the digital input channel only i e it is not dependent on the output sample rate which is set indirectly by the factor parameter For example using an input channel sampled at 2000 Hz provides 1 accuracy of a 20 Hz pulse signal or 0 1 accuracy of a 2 Hz pulse signal As a rule of thumb the input sample rate should be 100 times the maximum expected pulse frequency to provide 1 or better accuracy over the entire range of pulse frequency content Input Channel The input channel data type must be 8 bit unsigned logical Output Data Type The output channel data type is 32 bit float Output Rate Factor Specify the desired down sample factor which sets the output sample rate based on the sample rate of th
7. Rezero Offset View the differences between the current transducer calibration intercepts and those defined at test initialization For each transducer channel this difference is the cumulative sum of all rezero offsets in engineering units since test initialization Rezero Display Use the rezero display to view and rezero the defined transducer channels Select the desired channel or channels and click OK TCE continuously reads and displays the current transducer signals in engineering units Select the hold option to pause display updates or use the scroll bar at the right of the window to adjust the display update 65 I D SoMat eDAQ lite 66 rate The rezero display also shows the prerun rezero value defined for the transducer in the test setup and indicates in the A column if the transducer is to be rezeroed just prior to the next test run To manually rezero a channel select the transducer in the B column and click the rezero button or press ALT R Reference Shunt Checks Use the reference shunt checks option to perform shunt resistor checks on the low level transducer channels that are defined with the reference shunt option enabled The shunt check information includes the transducer channel ID the last check span in engineering units stored in the data file and the difference between the minimum and maximum shunt check spans in engineering units Select more info to view a more detailed report of the shunt check
8. ZN Bridge Factor Define the bridge factor for the specific configuration of strain gages used TCE uses this value only in the shunt tool calibration option that defines an equivalent strain based on the gage factor and bridge factor values The bridge factor is defined here as the arithmetic sum of the active bridge legs for any bridge configuration For quarter bridge applications the bridge factor is normally one for half bridge applications where both active gages are additive it is normally two and for full bridge applications where all active gages are additive it is normally four Because there are special applications where the bridge factor can be a fraction and or a negative value TCE considers any nonzero value valid Leadwire Resistance Correction Select the leadwire resistance correction option to compensate for leadwire resistance effects when using the defined span or external span calibration modes NOTE The eDAQ lite always performs leadwire resistance correction for shunt calibrations and transducers calibrated using the defined span or external span calibration modes Leadwire Resistance Specify the value of the leadwire resistance when using the leadwire resistance correction option The resistance input is the resistance of one lead ideally measured from the SMART module connector pin to the connection at the active bridge leg It is presumed that all lead wires are approximately the same length Quarter bridge ap
9. channel TCE adds the new channel below the selected entry For more information on setting up a computed channel see Creating Channels and DataModes on page 57 For information on specific computed channel types see Computed Channels on page 115 DataMode Setup Use the DataMode window to define the DataMode configuration required for the test A DataMode definition consists of a list of input channels a data sampling rate triggering mode and conditions and other DataMode specific parameters Option Description Add Add a new DataMode definition to the setup TCE adds the new DataMode above the selected entry Del Delete the selected DataModes definitions Edit Modify the selected DataMode definition Copy Copy the selected DataMode definition into a new DataMode definition TCE adds the new channel below the selected entry Mem Display the SIF data raw memory allocated for the selected DataMode definition For more information on setting up a DataMode see Creating Channels and DataModes on page 57 For information on specific DataMode types see DataModes on page 145 Pull Down Menus The following table describes the menu options available in TCE Where applicable the last column provides a section number in this document for more information on the menu command NOTE To perform any tasks in the FCS Setup menu the PC must be connected to the eDAQ lite specified in t
10. him Figure 3 1 TCE setup windows for a new test setup file Create a new test s300 Test ID Network Setup The upper test identification section of the window shows the descriptive name of the test the name of the operator the test date and any notes or comments regarding the test or special instructions The lower network setup portion of the window contains the eDAQ lite or the list of eDAQs for the test setup and their network node parameters 37 I SoMat eDAQ lite 38 Option Description Edit ID Modify the test identification information shown in the upper window Import Import a network node definition from an existing TCE setup file TCE also imports all hardware modules transducer and computed channels and DataModes associated with the network node Add Add a network node to the existing TCE setup file Specify an IP address or host name and communication parameters Del Delete an existing network node from the TCE setup file TCE also deletes all hardware modules transducer and computed channels and DataModes associated with the network node Edit Modify an existing network node definition Data Option Select the desired data file format For more information on data format options see Default data option Manage SIE Files Launch the eDAQ lite web interface to manage the SIE data files on the eDAQ lite For more information on managing SIE files see SIE Test Data on page 164
11. T o SoMat eDAQ lite Option Description Add Add a new transducer definition to the setup TCE adds the new transducer above the selected entry Del Delete the selected transducer channels Edit Modify the selected transducer channel definitions Edit a single transducer definition or a group of transducers of the same channel type Copy Copy the selected transducer definition into one or more new transducer definitions TCE adds the new transducers below the selected entry Sort Sort the transducer channels list alphabetically by connector ID DVM Run a DVM display for the selected transducer channels This option is not available when a test is initialized For more information on the DVM display see DVM on page 71 Scope Run the scope display for the selected transducer channel The scope display is limited to a single channel This option is not available when a test is initialized For more information on the scope display see Scope Plot on page 72 Freq Run the spectrum analyzer display for the selected transducer channel The spectrum display is limited to a single channel This option is not available when a test is initialized For more information on the spectrum display see Spectrum Plot on page 73 Cal Perform various calibration tasks on the selected transducer channels This option is not available when a test is initialized For
12. The equivalent strain uses the following equation 1000000R BG R Bs where is the equivalent strain in microstrain units Ag is the nominal gage resistance Gis the gage factor and Bis the bridge factor s NOTE If the shunt target results in a downscale shunt is multiplied by 1 NOTE Changing the bridge type bridge resistance shunt target gage factor or bridge factor invalidates the computed equivalent strain Run the shunt tool again after changing these parameters Multi Point Cal The multi point calibration mode is available for ELBRG and ELHLS channels only When beginning a calibration with the multi point cal mode selected follow the instructions on the series of configuration windows to fully define the calibration Define anywhere from 3 to 16 calibration points for TCE to acquire and least squares fit to determine the best linear fit calibration slope and offset Once the calibration is completed TCE creates two defined values based on the user defined full scale min and max Calibration Control Access the calibration control options by selecting to calibrate an already calibrated channel Use calibration control to perform various transducer calibration tasks including check calibration zero adjust calibration or delete calibration 12773 2 0 en I e z SoMat eDAQ lite 12773 2 0 en 1 7 ne KZ ne A NT a Js ZN Check Calibration Th
13. ly NOTE N CN a For all storage media options the eDAQ lite stores raw SIF test data and related p I Fa information in a set of individual component files referred to as SIC files using a fixed naming convention i e sif00000 sic sif00001 sic sif00002 sic etc To view these files use the explore eDAQ files option in the web interface to navigate to the hd eDAQ directory This is not recommended except under the advise of HBM support 12773 2 0 en 33 I D SoMat eDAQ lite 34 2 4 2 Data Storage Options The ELCPU contains several options for data storage including the RAM disk an internal CompactFlash card and DRAM memory NOTE The internal CompactFlash and DRAM memory options are referred to collectively as PC Card storage For information on selecting the actual media using the eDAQ lite web interface see Select Storage Device on page 163 RAM Disk The RAM disk storage option has quite limited use in most test applications The default 3 5 MB size is usually much too small for sequential data storage or histogram data storage of many test runs The RAM Disk memory is a section of the volatile DRAM memory This section of DRAM memory is copied to the internal CompactFlash card on power downs or error resets and then copied back to DRAM on boot up NOTE The SIE format does not support data collection to the RAM Disk Regardless of the data storage setting SIE data is saved to the storage device selecte
14. Checking Current Layer Addresses To check the current layer addresses use TCE to upload the eDAQ lite log Select Upload FCS Log from the FCS Diagnostics sub menu of the FCS Setup menu Choose to view the file in Microsoft Notepad and then scroll to the end of the log file where there is a list of the installed hardware and their jumper address An example list is below lt LogBook End gt Slot Jumpers 00 01 02 03 04 05 06 07 0 nF FN FP MPSELO1 BRGELO1 BRGELO1l DIOELO1 GPSELO1 HLSELO1l Type MPBELO1 PWRELO1 Name Version Serial MPB v5 4 ELMPB 01 1632 MPBSer ELMPB 01 1632 Power v2 2 ELPWR 03 1632 Brg 1 v1 2 ELBRG 02 0702 Brg 2 v1 2 ELBRG 02 1235 DIO 1 v1 7 ELDIO 02 1097 GPS I v1 7 ELDIO 02 1097 HLSS 1 v1 1 ELHLS 03 2378 24 Layer Address Jumpers On all eDAQ lite layers except the ELCPU there is a set of three jumper locations used to assign a physical layer address Each jumper location consists of two associated pins labeled 1 2 3 4 or 5 6 where pins 1 2 represent the least significant digit and pins 5 6 represent the most significant in a three digit binary number A jumpered pair results in a logical 0 An illustration of all possible logical addresses follows 12773 2 0 en I ey SoMat eDAQ lite 12773 2 0 en IZ me Nr _ IS FEN Figure 2 1 Possible jumper configurations for addressing eDAQ lite layers All layer address
15. SAC TRAN MP VO Signal GND Shield Figure 13 1 Wiring diagram for the preferred switch configuration on an ELDIO input Alternate Switch The following diagram shows the circuit wiring for an alternate digital input involving a switch closure function An open switch as shown is TRUE a closed switch is FALSE This circuit is adequate for most applications VO Signal SAC TRAN MP GND Shield Figure 13 2 Wiring diagram for the alternate switch configuration on an ELDIO input Digital Output Use the SoMat SAC TRAN MP Transducer Cable 1 SAC TRAN MP 2 2 or 1 SAC TRAN MP 10 2 to wire ELDIO digital outputs 185 SoMat eDAQ lite I D Operating a 12 volt Incandescent Bulb The following diagram shows an incandescent bulb 3 watts maximum used as an indicator in the digital output circuit An external 12 volt DC power supply provides power for the bulb A three watt bulb uses the current capacity of all lines in an ELDIO bank The light turns on when the output is set to FALSE Light 3W max VO Signal ELDIO vo SAC TRAN MP GND Shield Figure 13 3 Wiring diagram for using an incandescent bulb on an ELDIO output Operating a Light Emitting Diode LED The following diagram shows the use of an LED as an indicator in the digital output circuit A FALSE output causes the diode to light The total of all diode currents must be less than 250 mA for the an ELDIO bank The resistor R limits the current thr
16. SMSTRB4 ns to internal completion resistor brown Figure 13 8 Wiring diagram for a quarter bridge configuration using a Strain SMART Module Vly NOTE N a For the SMSTRB4 the brown lead wire is routed to the internal completion resistor CF For the older fixed quarter bridge SMART modules i e modules with serial numbers starting with SMSTROB the white lead wire is routed to the internal completion resistor 13 3 ELBRG Bridge Layer 13 3 1 Bridge Transducers Use the SoMat SAC TRAN MP Transducer Cable 1 SAC TRAN MP 2 2 or 1 SAC TRAN MP 10 2 to wire ELBRG bridge transducer inputs Excitation ELBRG SAC TRAN MP Excitation black Signal white Figure 13 9 Wiring diagram for a full bridge configuration on an ELBRG layer 188 12773 2 0 en SoMat eDAQ lite I Excitation ELBRG SAC TRAN MP Excitation black Figure 13 10 Wiring diagram for a half bridge configuration on an ELBRG layer Excitation ELBRG ay SAC TRAN MP green to internal completion resistor brown Figure 13 11 Wiring diagram for a quarter bridge configuration on an ELBRG layer 13 3 2 Analog Input Use the SoMat SAC TRAN MP Transducer Cable 1 SAC TRAN MP 2 2 or 1 SAC TRAN MP 10 2 to wire ELBRG analog inputs Vly NOTE a Do not use this wiring diagram for ELHLS channels a N Signal white ELBRG SAC TRAN MP green Shield Ground bare Figure
17. desired suppression in engineering units to zero degrees set the suppression value to zero integer counts However there is no way to set the desired suppression in engineering units to exactly 7 degrees since 7 degrees is equivalent to 39 822 counts which is not an integer value To avoid this problem set the calibration intercept to 7 0 degrees and then use a suppression value of zero Bitmap Trigger The Bitmap Trigger computed channel produces a logical output based on the match of the input bitmap channel and the user specified bitmap mask Use with an Anomaly Detect computed channel to generated a trigger when the eDAQ lite detects a defined anomaly For more information on the Anomaly Detect computed channel see Anomaly Detect on page 142 Input Channel The input channel data type must be the output of an Anomaly Detect computed channel which is the only eDAQ lite channel with an output data type of 8 bit unsigned bitmap Output Data Type The output channel data type is 8 bit unsigned logical Bitmap Check Mode Select the desired bitmap check mode from the two available options Bitmap Check Mode Description Any bit in mask set If any bit in the specified bit mask is set the output value is TRUE otherwise it is FALSE All bits in mask set If all of the bits in the specified bit mask are set the output value is TRUE otherwise it is FALSE Bit Mask Specify the desired bit mask in hexadecimal format
18. labels Store the TCE channel description fields in the data file for use as labels on plot windows When selected empty or duplicate channel descriptions prompt warnings from TCE Modifying this option is not available after test initialization NOTE Although TCE description fields allow 63 characters data file labels are limited to 31 characters Because the Rainflow and Peak Valley Matrix DataModes add prefixes to the labels it is recommended to limit the description field to 24 characters when using these DataModes Require user to verify test control selections Force TCE to issue a verification prompt after every Test Control menu command Chain auto range options to stop test run Require TCE to open the auto range options dialog after each test run stops For more information on auto range options see Auto Range Options on page 53 Chain SIF frame demultiplex to upload consolidate SIF Only Force TCE to demultiplex all multiplexed SIF file data records after successful upload or SIC consolidation This option significantly improves data analysis performance by products such as InField Note that TCE does not perform the demultiplexing if there are any abnormalities in the upload or consolidation 12773 2 0 en SoMat eDAQ lite x e z Prompt user for run descriptions on test run starts Force TCE to issue a prompt for a test run description at the start of every test run As this option is the only method of enteri
19. 13 12 Wiring diagram for a standard analog input on an ELBRG layer 12773 2 0 en 189 x ey SoMat eDAQ lite 190 12773 2 0 en HBM SoMat eDAQ lite 14 Data Synchronization 12773 2 0 en 14 2 This section describes the limitations on the synchronization of the data samples eDAQ lite data acquisition synchronization across channels is accomplished by using a single master clock source that drives the data acquisition hardware The term lag indicates that in a Time History plot the data appears later than it should while the term lead indicates that the data appears earlier than it should NOTE Unless otherwise noted the following discussion and numerical examples assume a 100000 Hz master clock rate Data Synchronization Characterization Method To characterize eDAQ lite data synchronization a 5000 millivolt triangle function generator waveform is fed in parallel into all channels to be characterized The frequency of the waveform is set at the sample rate divided by 1000 to yield 1000 sample points per cycle For each reversal all data samples that fall between 2000 millivolts are least squares fit to provide a very accurate measurement of the zero crossing time The differences in these zero crossing times from one channel to the next represent the data skew from one channel to the next For each test run the data skew on at least 200 consecutive reversals is measured and then averaged At least 3 test runs
20. 83 x gt 0 amp amp x lt 50 s4 x lt 0 The second step is to define the required set of arithmetic Desk Calculator channels y1 y2 y3 y4 as follows yl 2 1 x 100 y2 2 2 x 90 y3 2 3 x 80 y4 2 4 x 70 The third step is to define the final Desk Calculator channel y as follows y yl float s1 y2 float s2 y3 float s3 y4 float s4 Note that it is not necessary to define the intermediate variables and in fact it is less efficient from a processing point of view to use intermediate variables when they are not used more than once in the set of computed channels However they have been used above to clarify the general approach 7 2 2 Engineering Scaler The Engineering Scaler channel generates a 32 bit float output channel scaled to engineering units from an integer data type input channel Input Channel The input channel data type must be 8 bit integer 8 bit unsigned 16 bit integer 16 bit unsigned 32 bit integer or 32 bit unsigned Output Data Type The output channel data type is 32 bit float 7 2 3 Integer Scaler The Integer Scaler channel generates an integer data type output channel from any 32 bit float input channel 12773 2 0 en 119 I D SoMat eDAQ lite 120 7 2 4 Input Channel The input channel data type must be 32 bit float Output Data Type The output data type must be 8 bit integer 8 bit unsigned 16 bit integer 16 bit unsigned 32 bit integer or 32 bit unsigned Int
21. Channels 111 6 7 1 Simulation File 111 6 7 2 Simulation Function Generator 112 6 7 3 Simulation Message 113 7 Computed Channels 115 7 1 Common Computed Channel Parameters 115 7 2 Arithmetic Computed Channels 116 7 2 1 Desk Calculator 116 7 2 2 Engineering Scaler 119 7 2 3 Integer Scaler 119 7 2 4 Integrator 120 7 2 5 Pulse Counter 122 7 2 6 Directional Velocity 123 12773 2 0 en 7 SoMat eDAQ lite HBM 7 2 7 State Mapper 124 7 2 8 Statistical Analysis 125 7 2 9 Damage Equivalent Load 127 7 2 10 Fatigue Damage 128 7 3 _ Triggering Computed Channels 131 7 3 1 Interactive Trigger 132 7 3 2 Trigger Generator 132 7 3 3 Timed Trigger 133 7 3 4 Triggered Zero Suppression 134 7 3 5 Bitmap Trigger 135 7 3 6 Test Run Stopper 135 7 4 Time Sample Rate and Filter Computed Channels 136 7 4 1 Time Channel 136 7 4 2 Time Base Shifter 137 7 4 3 Down Sampler 137 7 4 4 Up Sampler 138 7 4 5 Smoothing Filter 138 7 4 6 Digital Filter 139 75 Tracking Computed Channels 140 7 5 1 Max Track 140 7 5 2 Min Track 141 7 5 3 Range Track 141 7 5 4 Anomaly Detect 142 7 5 5 Valid Data Gate 143 8 DataModes 145 8 1 DataMode Memory Consumption 145 8 2 Common DataMode Parameters 145 8 12773 2 0 en SoMat eDAQ lite HBM 8 3 Sequential DataModes 147 8 3 1 Time History 147 8 3 2 Burst
22. DVM display depends on the e display mode selected in the Group DVM Display Preferences For more information on these preferences see Group DVM Display on page 52 Notes on Run Time Displays Run time data is acquired using two different methods depending on the display mode The digital readout bar chart and strip chart displays use the min max data acquisition method while the scope and spectrum plots use the contiguous block data acquisition method Min Max Method e When the run time display starts the eDAQ lite continuously monitors each channel tracks the minimum and maximum signal values and holds those values in a buffer Periodically TCE polls the eDAQ lite to get the minimum and maximum values After the eDAQ lite sends the values to TCE it resets the min max search so that the next read gives the minimum and maximum values since the last read A min max display runs continuously on the eDAQ lite while the display is opened and examines all data samples in the min max search Though the display was designed to minimize the overhead on the eDAQ lite it does add to the eDAQ lite processing load and can result in a DeviceOverFlow error reset for tests running at the edge of the eDAQ lite processing limit Minimum and maximum values are not time stamped and the TCE polling loop results in reads that are only approximately equally spaced in time When using PC Card data storage the time interval between TCE polls is typi
23. For a transducer that has not been calibrated indicated by a No as its calibration date select Cal in the transducer channel setup window to begin calibration For calibrated transducers select Cal to perform one of several calibration control options NOTE For some channel types TCE completes the calibration date parameter when the channel is created To calibrate these channels first delete the calibration by selecting Cal and choosing the Delete Calibration option Calibration Modes Modify the calibration mode on the second page of the channel definition window accessible with the Edit option or by double clicking the channel The two mode parameters define the two steps required to uniquely determine the calibration line which represents the linear relationship of engineering units to the input signal Define either two calibration points values or one calibration point value and a calibration slope span With the two calibration steps properly defined select Calibrate to perform the actual calibration Upon completion TCE sets the calibration date to the current date and disables the parameters related to calibration 59 SoMat eDAQ lite x u General Calibration Modes Select one of four available calibration modes for generic transducers Cal Mode Description External Value Define a single point on the calibration line When prompted during the actual calibration run apply the transducer signal valu
24. For more information on vehicle bus message channels see Vehicle Bus Message on page 89 12773 2 0 en x e z SoMat eDAQ lite 6 7 Simulation Input Channels Use a simulation transducer to simulate transducer input into the eDAQ lite This type of transducer is independent of the signal conditioning hardware on the eDAQ Iite Simulation transducers are used extensively in the product development cycle at HBM primarily to test computed channel and DataMode functionality There are two types of simulation transducers available NOTE The full scale min and max values are required only if the simulation transducer data is stored in an integer format DataMode i e 16 bit or 8 bit storage modes Simulation File The file based simulation transducer provides the capability to simulate input based on an ASCII file definition of the data stream allowing completely arbitrary input data streams Because TCE reads the ASCII file using a C fscanf function in float format the data entries must be separated by white space only There is no limit on the number of points however be aware that the data points are stored in the eDAQ lite RAM disk consuming data storage memory Example Simulation Files The following examples define the same data stream but use white space differently Example 1 100 0 Example 2 100 0 500 0 700 0 300 0 500 0 700 0 300 0 12773 2 0 en Output Data Type The output da
25. HBM customer service The following actions are recommended Document the problem If possible make a detailed note of the conditions under which the problem occurs It is particularly helpful to know if the problem is repeatable happens occasionally or happened only once and cannot now be repeated Providing a test setup file can also expedite the troubleshooting Check known problems Check for the symptom in Known Problems and perform the recommended action If the problem is not solved note the results for communication with HBM customer service Use the eDAQ lite error reporting tools The eDAQ lite has a significant amount of built in checks to flag error conditions and provide information back to the user or HBM customer service Use the following eDAQ lite reporting tools 1 Take note of the eDAQ lite front panel LEDs When the eDAQ lite detects an abnormal situation it responds by turning the red LED on For more information on the status LEDs see Status LEDs on page 23 2 With the eDAQ lite connected to the PC get the test status using TCE or the web interface Note any error or status flags and check the eDAQ lite Flags section for their meaning In a few cases the flags may provide sufficient information to understand the problem For more information on getting the test status see Monitoring Test Status on page 68 3 View the eDAQ lite log using TCE or the web interface The log usually provides more deta
26. In 2 sqrt In _1 2 In_2 2 Here is a much more efficient usage Temp _1 sqrt In _1 2 In 2 2 Comp 1 In 1 In 2 Temp 1 Comp 2 In 1 In 2 Temp 1 Also although probably much less obvious the Temp_1 expression is more efficient when written as follows Temp_1 sqrt In 1 In 1 In 2 In 2 For more information on the Desk Calculator computed channel see Desk Calculator on page 116 Minimize the number of defined DataModes For a test with 20 transducer channels defined at the same sample rate it is much more efficient to store all 20 channels in a single Time History DataMode rather than storing each channel in a separate DataMode The reason for this is that there is only one PC Card file opened and manipulated for each Time History DataMode and having just one file to manipulate is much more efficient than having to manipulate 20 PC Card files at the same time Up sample digital input channels used for triggers Often a digital input channel is used to manually trigger DataMode storage If the input channels are defined for a 2500 Hz sample rate and storage rate it is more efficient to define the digital input channel at 100 Hz and then up sample by a factor of 25 to get to the 2500 Hz sample rate required for the DataMode trigger For more information on the Up Sampler computed channel see Up Sampler on page 138 Do not use min max tracking The enable min max tracking prefe
27. In general when the eDAQ lite reads and time stamps the data samples the time stamps fall somewhere between eDAQ lite sample periods For example for a thermocouple channel output at 1 0 Hz the input data samples almost always have fractional time stamps such as 1 345 seconds or 3 360 seconds The eDAQ lite runs its resampling algorithm to generate data outputs at one second intervals in this example While the specific details of the current resampling algorithm are beyond the scope of this document the general characteristics are as follows First the resampling function is biased towards introducing a synchronization lead i e the resampled time is always less than or equal to the time stamp time In the example case the data output associated with the 1 0 second time slot is set with the last data sample that has a time stamp of at least 1 0 seconds and less than 2 0 seconds Because of this the resampled channels can lead by up to one full sample period If the data samples are sourced at a much higher rate than the resampled output rate e g 50 Hz to 1 Hz then the synchronization lead will be almost one full second consistently 193 I SoMat eDAQ lite 194 14 4 1 14 4 2 14 5 14 5 1 14 5 2 Bus Oriented Channel Synchronization The vehicle bus serial bus and GPS messages are time stamped as they are received by the eDAQ lite The time stamps are synchronized to the same eDAQ lite MSR clock used for all
28. Networked eDAQ lite eDAQ System Synchronization on page 194 Hardwired Network This section describes how to set up the eDAQ lite eDAQ hardware for networking For information on using TCE to manage an eDAQ lite eDAQ network see Networking eDAQ lite eDAQ Systems on page 81 Required Hardware For n eDAQ lite eDAQ systems the following hardware is required and assumes Ethernet communications mode A hardwired network consists of one master eDAQ lite eDAQ and 1 slave units e n Networking Adapter Cables 1 SAC ESYNCADAPT 2 e 1 Networking Sync Cables 1 SAC ESYNC 2 2 Networking Termination Connectors 1 SAC ESYNCTERM 2 e 1 100BASE T Ethernet hub with 7 1 ports Hardware Connections Referring to the diagram below the SoMat SAC ESYNCADAPT Networking Adapter Cable 1 SAC ESYNCADAPT 2 is a communications cable that includes two cable stubs with LEMO connectors which provide a tee connection to the data synchronization clock The master eDAQ lite eDAQ supplies the clock and distributes it to each slave through the SoMat SAC ESYNC Networking Sync Cables 1 SAC ESYNC 2 For the each of the end units connect one side of this tee to a SoMat SAC ESYNCTERM Networking Termination Connector 1 SAC ESYNCTERM 2 eDAQ2 eDAQn Comm Comm SAC ESYNC SAC ESYNC TERM SAC ESYNCADAPT SAC ESYNCADAPT 2 5 2 1 2 00 Ethernet hub Figure 2 6 Cable connections for networking multiple eDAQs Wireless Network With a GPS modu
29. Option Use the voltage divider option to increase the full scale input range from 10 0 volts to 74 9 volts This option uses a resistive voltage divider circuit with an input impedance of only 100 kilohms compared to 10 megohms without the divider circuit Ensure that the transducer output is not dragged down by this relatively low input impedance when using this option Transducer Power Set the power supply voltage from 4 to 15 volts in integral steps of one volt The power is limited to approximately 400 milliwatts for each channel If the transducer does not require power set the power to 0 Alternatively select the ICP adapter power option to provide 10 milliamps at 24 volts for each channel NOTE For certain types of SMART modules the transducer power is restricted to the following 13 volts for the Strain SMART Module with ten volt excitation eight volts for the Strain SMART Module with five volt excitation and eight volts for the SMITC NOTE To supply power greater than 400 milliwatts to a single transducer define multiple channels and tie their power sources together All the channels used for a single transducer must have the same voltage settings SMART Module Input Channels Add a SMART module channel to any ELHLS connector with an installed SMART module Complete the parameters for the ELHLS parent channel as well as the SMART module specific parameters Configure the SMART module parameters by selecting the configure opt
30. Processor eDAQ lite High Level Analog Layer ELBRG 1 ELBRG 350 2 eDAQ lite Bridge Layer 350 Ohm 1 ELBRG 120 2 eDAQ lite Bridge Layer 120 Ohm ELDIO 1 ELDIO B 2 eDAQ lite Digital Input Output Layer 1 ELDIO 5HZGPS 2 eDAQ lite Digital Input Output Layer with GPS ELNTB 1 ELNTB 2 eDAQ lite Non Isolated Thermocouple Layer ELBAT 1 ELBAT 2 eDAQ lite Battery Layer Equipment This section describes the provided equipment and the support equipment necessary to set up the eDAQ lite system and run a test Provided Equipment The initial shipment of a basic eDAQ lite contains the hardware listed below additional hardware may be included based on options ordered The eDAQ lite also comes with SoMat Test Control Environment TCE software NOTE If any items do not arrive as expected contact your system supplier nearest HBM sales representative or HBM immediately SoMat eDAQ lite HBM Item Order No Description SoMat eDAQ lite SoMat eDAQ lite base layer and any optional layers SoMat Communications 26 pin HDD Sub male plug with two connector cables one Cable labeled E ETHERNET which ends in an RJ 45 connector 1 SAC ESR9 XO 2 or and the other labeled RS232 which ends in a 9 pin D Sub 1 SAC ESR9 HUB 2 female plug The XO cable is used for connection directly to the host computer while the optional HUB cable is used for network operation SoMat Power Cable 15 pin D Sub female plug with
31. TRUE to FALSE If the sum on trigger option is not selected then the output sample after the TRUE to FALSE edge is the sum of the initial value and the scaled input sample NOTE When using the sum on trigger option the trigger condition is limited to on a TRUE to FALSE edge 12773 2 0 en SoMat eDAQ lite x e z Reset on Sum Exceed Select the reset on sum exceed option to reset the integrator to the initial value when the absolute value of the integrator sum exceeds the value specified in the sum exceed value field ly NOTE S rey 7 If using the reset on sum exceed option the eDAQ lite does not allow any other trigger a or reset options Initial Value Specify the value for the integration sum at the start of each run and on a reset if using the reset enable option NOTE Kl N Rn a For an input data type of 32 bit unsigned or 32 bit signed the initial value is fixed at Fu zero Scale Factor Specify the value to scale each input sample before adding it to the previous integration sum Setting the scale factor to the sample period results in the time integral of the input channel ely NOTE N WV For an input data type of 32 bit unsigned or 32 bit signed the scale factor is fixed at ANY one Use 64 bit Float for Sum Select the 64 bit float for sum option to ensure that the integration is not subject to the inherent limitations of using a 32 bit float to accumulate the integration sum This is p
32. Type The output channel data type is 8 bit unsigned logical 12773 2 0 en HBM SoMat eDAQ lite 8 DataModes 12773 2 0 en ae lt A N ik 8 1 This chapter details the available DataModes and their associated parameters and discusses data storage and memory considerations DataModes determine how the eDAQ lite stores and displays test data A DataMode definition consists of a list of input channels a data storage processing rate triggering conditions and other parameters specific to the DataMode DataMode Memory Consumption The defined DataModes determine the rate at which the eDAQ lite consumes memory There is some overhead for storing the test setup file and other eDAQ lite files but typically these files require much less that 1 MB for most large channel count test setups and proportionately less for tests with fewer channels For SIE data files there is additional overhead for the data file internal linkage and consistency check parameters The overhead is usually insignificant consuming only a few percent of the data file For SIF data files there is additional overhead for the data file header information and internal pointers This overhead is usually fairly insignificant consuming only a few percent of the data file However there are some situations where this overhead can become very significant In particular the overhead in storing burst data records in the Burst History Da
33. V black eDAQ Remote Power V red 4 Vehicle firewall Figure 2 4 Vehicle battery connection for switching battery to ground The figure below shows an example of improper powering that may result in a short and damage the eDAQ lite 32 12773 2 0 en HBM SoMat eDAQ lite V Vehicle Battery Main Power SAC EPWR15 black Power V black gt eDAQ Remote Power a V red Vehicle firewall Figure 2 5 Improper vehicle battery connection for switching battery to ground 2 4 Data Storage 2 4 1 Data Formats The eDAQ lite offers two formats for storing recorded data SIE and SIF Select which data format to use in the TCE network setup window A summary of the differences between the SIE and SIF data formats follow SIE SIF Unlimited file size Files limited to slightly less than 4 GB eDAQ lite can store multiple data files eDAQ lite can only store one data file Data is readable during testing Data is readable only after test completion No support for RAM disk data storage RAM disk data storage available No support for max bursts mode for the Burst Max bursts mode available for the Burst History DataMode History DataMode No support for accumulating histogram data Support for accumulating histogram data across test runs across test runs For more information on using SIE and SIF in TCE see Default data option on page 48
34. a data type of 8 bit unsigned logical Initial State For each digital output select the initial state as either high TRUE or low FALSE The eDAQ lite imposes the initial state at the start of the test run 157 SoMat eDAQ lite HBM Stop Run Action For each digital output select the desired action when the test run stops Stop Run Action Description No Action Do not change the output line when the test run stops Set Hi Set the output line to high TRUE when the test run stops Set Lo Set the output line to low FALSE when the test run stops Output Mode Each digital output has five available output modes The sample interval is the time period associated with the sample rate of the input channels Since the input channels defined in the data mode can have different sample rates the sample interval can vary from channel to channel The abbreviation used in the channel definition is in parentheses Output Mode Description Normal Unlatched N U Output TRUE if the sample interval contains a TRUE value otherwise output FALSE Invert Unlatched I U Output FALSE if the sample interval contains a TRUE value otherwise output TRUE Normal Latched N L Output TRUE and hold through the end of the test if the sample interval contains a TRUE value Invert Latched I L Output FALSE and hold through the end of the test if the sample interval contains a TRUE value Toggle Latched T L Togg
35. a user defined triggering event occurs The term burst refers to a set of contiguous data samples The Burst History DataMode is particularly useful for characterizing rare events at high data sampling rates The eDAQ lite uses a circular buffer to allow storage of data both before and after the specified trigger NOTE The total number of points stored is the sum of the post trigger and pre trigger time periods multiplied by the selected data sampling rate plus one since the trigger sample is always stored Input Channel The input channels can be any data type Data Type For 32 bit float input channels select one of three available formats for data storage and conversion 12773 2 0 en x e z SoMat eDAQ lite 12773 2 0 en Ky l 7 a me k N IS IS ZN FIN Data Type Description 32 bit float No conversion is necessary Use the 32 bit float mode for computed channels where full scale estimates are uncertain or unknown 16 bit integer Maintain the resolution of both the 12 bit and 16 bit A D converters 8 bit integer Lose significant resolution in both the 12 bit and 16 bit A D converters Use the 8 bit integer mode only for a rough picture of channel behavior NOTE Using the integer data types requires that valid full scale minimum and maximum values are defined for each input channel selected for the DataMode Post Trigger Time Specify the desired period o
36. and ELBRG layers in general 12773 2 0 en I SoMat eDAQ lite 12773 2 0 en 14 3 14 4 Number of Channels oo 2 0 0 22 0 125 0 025 0 075 0 175 0 275 0 375 0 475 0 575 Data Skew microseconds Figure 14 1 Typical data skew distribution of 64 EHLS channels for several sample rates Digital Channel Synchronization The ELDIO digital input channels are synchronized to the analog channels as closely as possible The eDAQ lite reads the state of the digital input status register for each digital channel on each edge of the sample clock signal i e when the analog channel A D converters are read However because the digital status registers are updated when a digital input channel changes states the precise time when a digital input channel changes state is in general somewhere in between sample clock edges and hence is not known exactly Because of this the digital input channels are expected to lag the analog channels by about half of the sample period on average Resampled Channel Synchronization Resampled channels include vehicle bus serial bus GPS and thermocouple channel inputs The common aspect of all of these channels is that the data is not sourced from the MSR clock As such the data synchronization of these channels to the channels that are sourced from the eDAQ lite MSR is always somewhat less deterministic The major issue in dealing with these channels is referred to as resampling
37. and eDAQ lite information Keyword Extraction Options The keyword extraction options provide the opportunity to extract some of the global keyword data sets that are embedded in the SIE or SIF data file To access an available option select the corresponding radio button and click OK Keyword Data Set Description TCE Setup File Extract the TCE setup file to a PC file FCS Log File Extract the eDAQ lite log file to a PC file Test Run Descriptions Extract the TCE test run descriptions to a PC file State Mapper File Extract the specified by index State Mapper ASCII definition file to a PC file The file index starts from 1 TCE appends the original source ASCII file name to the extracted file Delete this file name from the extracted file to reuse the ASCII file in a State Mapper computed channel see State Mapper on page 124 Reference Shunt Check Info Extract the TCE reference shunt check information and display itin the same reference shunt checks TCE dialog window used during active test control For more information see Reference Shunt Checks on page 66 Run Rezero File Extract the run number indexed TCE transducer rezero ASCII file to a PC file The run number index starts from 1 The first line of the file specifies the run number The following lines contain the transducer channel ID and the zero offset value in engineering units There is one line for every transducer channel that can be rezero
38. area double click the desired logical channel to complete each digital output definition DIO Bitwise Digital Output Control amp Data Mode ID Corrector edaad DIO_1 abmo zj Cortrol Channel Select Cortrol Chart Mode Initial Stop Aun M 60 in NU Lo No Action iris Siste On Stop Aun Lo LA No Action v 03 Output Mode n 7 Nomat Oriatched sm en Target Bi Logcal Channels m fi doni 07 gt 4 oa 5 6 Tex Cancet Help Figure 8 1 TCE Digital Output DataMode definition window Use the Test button to open a window for testing the digital output bits and the devices tied to the output lines The test window contains a set of check boxes corresponding to the set of available digital output lines Check or uncheck the desired bits and select Set Bits to set the digital output lines based on the bit selections A checked box sets the output to high TRUE and an unchecked box sets the output to low FALSE Target Bit Select the desired digital output bit on the selected connector A bit must be configured as an output using the ELDIO configuration options If a selected bit is configured as an input TCE issues a warning For more information on configuring digital bits as outputs on the ELDIO layer see Configuration Options on page 86 Control Channel The control channel specifies the logical input channel to drive the digital output Use the presented list to select any defined logical channel with
39. battery is changed or disconnected and reconnected the eDAQ lite detects the new connection and assumes the battery to be discharged The eDAQ lite initiates the charge cycle upon connection to a power supply and runs until it detects a full charge NOTE The eDAQ lite web browser interface provides a status indicator that shows the level of battery charge as either low medium or high and indicates whether the recharging circuit is currently on or off Remote Power The remote power switch cable from the eDAQ lite power connector acts as a three way switch in conjunction with the front panel power push button Use the remote power cable with a single pole single throw contact switch The two physical switches the front panel switch and the user installed remote power switch act to invert the switching logic of the other Choose to power the eDAQ lite with either an open or closed remote power switch by simply toggling the front panel switch If not using remote power ensure that the red and black wires are either fully insulated from each other or solidly connected to each other to prevent accidentally turning the power off If the wires are connected to each other and there is any chance of magnetic induction do not coil the cable in a loop NOTE Do not apply any voltage source to the auxiliary power switch cable It is designed for use with a single pole single throw contact switch only Application Note Using Remote Power to Star
40. bit integer 32 bit unsigned Interactive Trigger all 8 bit unsigned logic Max Track 32 bit float same as input 16 bit integer Min Track 32 bit float same as input 16 bit integer Pulse Counter 8 bit unsigned logic 32 bit float Range Track 32 bit float 16 bit integer 32 bit float for 32 bit float input 16 bit unsigned for 16 bit integer input 12773 2 0 en SoMat eDAQ lite HBM Category Channel Type Input Data Type Output Data Type Computed Channel Smoothing Filter 32 bit float same as input continued 16 bit integer State Mapper 32 bit float 32 bit float Statistical Analysis 32 bit float 32 bit float Test Run Stopper 8 bit unsigned logic 8 bit unsigned logic Time Base Shifter all same as input Time Channel all 32 bit float 32 bit unsigned Timed Trigger 8 bit unsigned logic 8 bit unsigned logic Trigger Generator all 8 bit unsigned logic Triggered Zero Suppression 32 bit float same as input 32 bit integer 32 bit unsigned Up Sampler all same is input Valid Data Gate all 8 bit unsigned logic DataMode Burst History all Digital Output 8 bit unsigned logic Event Slice all Message Logger 8 bit unsigned msg Peak Valley 8 bit integer 16 bit integer 32 bit float Peak Valley Matrix 32 bit float 16 bit integer evenly divided bins only Peak Valley Slice master 8 bit integer 16 bit integer 32
41. channel that tracks the minimum value of the input channel A logical channel specified as a trigger can reset the output channel tracking Input Channel The input channel data type must be 32 bit float or 16 bit integer Output Data Type The output data type is the same as the input data type Enable Triggered Reset Select the triggered reset option to enable triggered resets of the tracker Vly NOTE N ah a Resetting the tracker sets the minimum value to the current sample value 7 Trigger Channel If using the reset enable feature specify the desired trigger channel Trigger Mode If using the reset enable feature specify one of three available trigger reset modes Trigger Mode Description When TRUE Reset when the trigger channel is TRUE On FALSE TRUE edge Reset when the trigger transitions from FALSE to TRUE On TRUE FALSE edge Reset on the sample after the trigger channel transitions from TRUE to FALSE 7 5 3 Range Track The Range Track channel generates an output channel that tracks the range of the input channel A logical channel specified as a trigger can reset the output channel tracking Input Channel The input channel data type must be 32 bit float or 16 bit integer 12773 2 0 en 141 SoMat eDAQ lite x u Output Data Type The output data type is 32 bit float if the input channel data type is 32 bit float and 16 bit unsigned if the input channel data type is 16 bit integer Enable Triggered Reset Sele
42. connectors on an ELHLS layer Each independent channel contains programmable transducer power an eight pole Butterworth analog guard filter a 16 bit A D converter software selectable digital filtering and output sample rate options of up to 100 kHz The ELHLS also provides 400 milliwatts of transducer power supply with an adjustable supply voltage of 4 15 volts for every channel Use the transducer power supplies in parallel for larger loads For more information on setting up ELHLS input channels see Simultaneous High Level on page 104 For information on wiring ELHLS inputs see ELHLS High Level Analog Layer on page 186 SMART Modules SMART module adapters act as an interface between a transducer and an ELHLS input channel which powers the module Each SMART module provides specialized signal conditioning as a front end to the ELHLS signal conditioning and includes independent self identification capabilities and self calibration parameters The following table lists the available SMART modules 91 I SoMat eDAQ lite 92 5 8 SMART Module Order Number Description SMSTRB4 Strain 1 SMSTRB4 120 2 or The SMSTRB4 supports full half and SMART Module 1 SMSTRB4 350 2 quarter bridge transducers and includes 5 and 10 volt excitation options and internal shunt calibration using either 50 or 100 kilohm shunt resistors with both upscale and downscale shunting options SMITC 1 SMITC 2 The SMITC supports f
43. control at each test initialization 12773 2 0 en x e z SoMat eDAQ lite i ZTN D 3 2 5 12773 2 0 en Input bit assignment Select the desired run stop control bit If the line for this bit is high logical 1 a test run starts when the line goes low logical 0 the test run stops NOTE With the remote control mode in use all digital input lines for the ELDIO can function as normal digital inputs Optional output bit assignments There are four status outputs available all are optional Output Description Running Indicates the test running state Flashing indicates running steady on indicates starting or stopping a run and steady off indicates no test run in progress Alarm Indicates a serious error or user alarm TCE always reports the specific error or warning condition on the next interaction with the eDAQ lite Note that running out of either RAM or PC Card memory sets this alarm RAM Low Indicates when the available RAM disk memory falls below the user specified limit PCM Low Indicates when the available PC Card memory falls below the user specified limit NOTE To support remotely powered LED indicators the eDAQ lite switches output lines to ground for the on state and to open circuit for the off state NOTE When using any of the optional output bits for eDAQ lite remote control operation digital outputs are always available but cannot be assigned to any bits used for r
44. cycle mean value dimension Range Only Accumulate cycle counts in bins with only a cycle range dimension To From Accumulate cycle counts in bins with both a to dimension and a from dimension The eDAQ lite assigns to and from designations to the first reversal instead of the second on which the cycle actually closes Hysteresis Enter the desired hysteresis level for the peak valley processing algorithm Number of Bins Specify the desired number of bins up to 500 for the histogram For the range mean and the to from histogram modes the value is for both histogram dimensions The total number of bins per dimension is the user specified number of bins plus two for underflow and overflow bins For the range mean and to from histogram modes which have two dimensions the total number of bins for the DataMode is the product of the total number of bins for each dimension Time at Level One Dimensional The Time at Level 1D DataMode stores one dimension Time at Level histograms in the output data file Specify multiple input channels to generate multiple one dimensional Time at Level data channels Input Channel The input channel data type must be 32 bit float or 16 bit integer If using the user defined bins option the input channel data type must be 32 bit float Number of Bins Specify the desired number of bins The total number of bins is the user specified number of bins plus two for underflow and overflow bins Time at Level
45. error becomes more significant for tests of long duration Time Base Shifter The Time Base Shifter channel generates an output channel that either leads or lags the selected input channel by a user defined number of samples Note that the channel fills the first 7 1 output samples with the initial value of the input channel Input Channel The input channel can be any data type Output Data Type The output data type is the same as the input data type Shift Direction Select the output channel shift direction to either lag or lead the input channel by the specified shift count Shift Count Specify the number of samples between 1 and 1000 for the output channel to lead or lag the input channel Down Sampler The Down Sampler channel reduces the number of samples taken from the input channel by a user defined factor simulating a lower sample rate and decreasing the amount of memory needed data storage For example a factor of three causes the channel to output one out of three input samples as illustrated below Figure 7 1 An illustration of the Down Sampler computed channel NOTE Use the Down Sampler only when data values in the input channel change slowly and the possibility of losing significant data is minimal Input Channel The input channel can be any data type 137 I D SoMat eDAQ lite 138 7 4 4 1 7 Saar 7 4 5 Output Data Type The output data type is the same as the input data
46. excitation range selection and the nominal gain which is determined by the calibration curve and not directly configurable For a 5 volt excitation range the inputs are limited to 180 millivolts for the nominal gain of 10 or 18 millivolts for the nominal gain of 100 For a 10 volt excitation range the inputs are limited to 360 millivolts for the nominal gain of 10 or 36 millivolts for the nominal gain of 100 NOTE The output voltage is always proportional to the excitation voltage The eDAQ lite makes minor corrections required to deal with slight differences in the calibrated excitation voltage and the nominal excitation of 5 or 10 volts Bridge Type Select the bridge type to match the transducer The available types are full bridge half bridge and quarter bridge NOTE For older SMART bridge modules the bridge type is fixed at production Bridge Resistance For quarter bridge configurations the value defaults to the provided completion resistor If necessary modify the value if the actual strain gage has a slightly different resistance For either full or half bridge configurations select any resistance in the range of 100 to 10000 ohms Gage Factor Define the gage factor for the specific strain gages used TCE uses this value only in the shunt tool calibration option that defines an equivalent strain based on the gage factor and bridge factor values 12773 2 0 en I e z SoMat eDAQ lite 12773 2 0 en l a
47. for each of the four parameters 6 After entering all the parameters enter y to confirm the settings or n to cancel 7 Reboot the eDAQ lite to complete the procedure and allow the modifications to take effect NOTE For complete access to all system tasks login as root with no password The command line prompt character is displayed Issue Unix based command lines to perform required tasks CAUTION All system firmware files and user data files can be deleted or corrupted by misuse of commands at the root interface level Only use the commands provided here or by customer service to solve or troubleshoot eDAQ lite problems Power Considerations The eDAQ lite requires an adequate power supply for the duration of all test runs Consult the following notes for important eDAQ lite power considerations CAUTION If operating the equipment on a DC supply network take additional precautions to discharge excess voltages Input Power Voltage Maximum Input Power Voltage The maximum input power voltage is 55 volts for the ELCPU PLUS processor and 18 volts for the ELCPU processor Exceeding the maximum input voltage for the eDAQ lite causes a programmed shutdown 12773 2 0 en x e z SoMat eDAQ lite 12773 2 0 en Ky lv ne 7 AN D FUN 2 3 2 The ELCPU PLUS processor supports nominal 12 24 and 42 volt vehicle battery systems while the ELCPU processor supports nominal 12 volt vehicle ba
48. input channels to a single DataMode must have the same sample rate and be defined for the same network node For a summary of the data types compatible with each DataMode see Data Types on page 175 Network Node This field displays the defined network node for the DataMode Triggering Option Select one of four available triggering options Triggering provides a mechanism for eliminating undesired segments of the input data stream before it is processed by any particular DataMode algorithm Triggering Option Description Always On Do not use triggering Data sampling is always on from the start of the test Trigger Data sampling starts when the trigger channel becomes TRUE Once the trigger channel is TRUE data sampling runs continuously irrespective of any future changes in the trigger channel Gate Data sampling occurs if and only if the trigger channel is TRUE Data sampling stops when the trigger channel is FALSE One Shot Take a single data sample when the trigger channel transitions from FALSE to TRUE or if the trigger channel is TRUE on the first sample of any run Trigger Channel Specify the trigger input when using a trigger option other than always on NOTE The optional trigger channel must have the same sample rate as the set of input channels to the DataMode 12773 2 0 en x e z SoMat eDAQ lite a ar t 8 3 8 3 1 12773 2 0 en Data Storage Select whether to store t
49. integer data type is required since the 32 bit float data type starts to lose resolution around this count To put this in some perspective a 2048 counts per revolution quadrature encoder on a shaft rotating at 3000 RPM accumulates 16000000 counts in about 2 5 hours however it takes about 350 hours to accumulate 2147483647 counts the maximum value of the 32 bit integer data type Mode There are several operational modes available for the pulse counter channel 99 I D SoMat eDAQ lite Mode Description Pulse Time Period Output the pulse period in microseconds The unsigned 32 bit counter can measure pulse widths from 200 nanoseconds to approximately 850 seconds Because this mode is the most efficient from a processing point of view consider using it for measuring the same types of parameters as the frequency mode when the eDAQ lite is near its performance limit or when post test processing can perform the calculations Pulse Frequency Output the instantaneous frequency of the input signal computed as the reciprocal of the period between the last two falling edges of the signal Use this mode for applications including measuring vehicle speed and engine RPM The output data type must be 32 bit float For important application information see Pulse Frequency Mode Notes on page 100 Pulse Rate Output the number of pulse counts in one sample period in units of pulses per second Hz Use this mode in conjunction
50. jumper sets are on the side of the bus connector receptacle i e opposite the side with the bus connector bare pins The jumper is labeled JP1 on all layers Valid Layer Addresses From the factory the ELCPU layer is hardwired with the address 0 and is always positioned at the bottom of the stack The stack can include any combination of additional add on layers stacked on top of the ELCPU layer Each add on layer must have a unique address An eDAQ lite stack may have a maximum of eight add on layers not accounting for power and temperature limitations NOTE For eDAQ lite stacks with more than one ELDIO layer any ELDIO layer with a GPS module must have a lower layer address than all ELDIO layers without a GPS module Stacking Order There are hardware IDs associated with each layer as displayed in TCE or the web interface For all layer types that can appear more than once in an eDAQ lite stack the hardware IDs have numbered suffixes starting with 1 and are assigned starting with the layer that has the lowest layer address For example if there are two ELBRG layers in the stack with layer addresses 3 and 4 the layer with address 3 is referenced as Brg_1 and the layer with address 4 is referenced as Brg_2 HBM has adopted the convention of assembling the stack so that the hardware ID suffix increases as the layer is positioned further away from the ELCPU In the example above the ELBRG addressed at 3 with hardware ID of Brg_1 is closest
51. may only be used as specified in the operating manual It is also essential to follow the respective legal and safety regulations for the application concerned during use The same applies to the use of accessories Each time before starting up the equipment you must first run a project planning and risk analysis that takes into account all the safety aspects of automation technology This particularly concerns personal and machine protection Additional safety precautions must be taken in plants where malfunctions could cause major damage loss of data or even personal injury In the event of a fault these precautions establish safe operating conditions This can be done for example by mechanical interlocking error signaling limit value switches etc General dangers of failing to follow the safety instructions The eDAQ lite complies with the state of the art and is safe to operate Inappropriate use and operation by untrained personel can give rise to remaining dangers Anyone responsible for installing starting up maintaining or repairing the equipment needs to have read and understood the operating manual and in particular the safety instructions Maintenance and cleaning The eDAQ lite is maintenance free Please note the following when cleaning the housing e Before cleaning disconnect the equipment from the power supply e Clean the housing with a soft slightly damp not wet cloth Never use solvents since these could damage
52. mean gate bit 2 of the output byte is set to 1 Limit Detect Select the limit detect routine to enable limit detection If any data sample in the analysis window is greater than the specified maximum limit or less than the specified minimum limit bit 3 of the output byte is set to 1 Kurtosis Detect Select the kurtosis detect routine to enable kurtosis detection If the kurtosis coefficient for the data in the analysis window is greater than the specified maximum limit then bit 4 of the output byte is set to 1 The eDAQ lite uses the following equation to calculate the kurtosis coefficient N N p 7 yd y u u 212 K N gt zi Zmean DIE tmean f i l i l where Nis the number of data samples in the analysis window and Xnean is the mean of the data samples in the analysis window Valid Data Gate The Valid Data Gate channel generates a logical channel data stream on a sample by sample basis marking samples containing invalid data The output sample is TRUE if and only if the data samples for all input channels are valid otherwise the output sample is FALSE Use the Valid Data Gate channel by itself or in conjunction with other logical channels as a gate trigger for DataModes to eliminate any invalid data samples 143 x u SoMat eDAQ lite 144 Input Channel The only channels that currently use invalid flags are vehicle bus serial bus GPS and temperature channels All data types are supported Output Data
53. modifications are permitted Type Define the type of measurement associated with the transducer or computed channel Typical types include strain load and acceleration Select a type from the list or directly key in a user defined type Since TCE uses the type definition in subsequent sections of the test setup process completing the field is recommended Units Define the units of measurement for the computed channel Since TCE uses the units definition in subsequent sections of the test setup process completing the field is recommended 115 I SoMat eDAQ lite 116 7 2 7 2 1 Input Channel Select the desired input channel s to the computation The number of input channels permitted depends on the computed channel type Output Data Type Depending on the channel type the eDAQ lite provides several data type options When choosing the data type consider factors such as data resolution mass storage consumption and what computed channels or DataModes use the channel as an input For a summary of the compatible data types for all computed channels and DataModes see Data Types on page 175 Full Scale Min and Max The min and max full scale fields define the expected extreme values of the computed channel expression When storing a 32 bit float in a DataMode that uses an integer data type the eDAQ lite uses the full scale limits when converting from the floating point format to the integer format The eDAQ lite al
54. more information on calibrating channels see Calibrating Input Channels on page 59 Ampl Report the selected signal conditioner amplifier settings This option is provided primarily for HBM development SMART Utils Open the SMART module utilities window This option is applicable for a SMART module transducer channel For more information on SMART utilities see Using SMART Utilities on page 105 For more information on setting up an input channel see Creating Channels and DataModes on page 57 For information on specific input channel types see Input Channels on page 95 Computed Channel Setup Use the computed channel window to define any computed channels required for the test Acomputed channel is derived from one or more transducer or previously defined computed channels Defining computed channels in a test setup is optional ly NOTE N PEN a A computed channel referencing a previously defined computed channel must be P o listed below the referenced channel in the setup window 12773 2 0 en 39 I SoMat eDAQ lite 40 ly NENI ei Option Description Add Add a new computed channel definition to the setup TCE adds the new computed channel above the selected entry Del Delete the selected computed channels Edit Modify the selected computed channel definition Copy Copy the selected computed channel definition into a new computed
55. must be in the range of the full range min and max values specified for the channel in the database definitions Bus channel inputs can be invalid for a number of reasons The data may be marked as invalid when the eDAQ lite interface receives the data e g the data may not be available at the source the data may be marked as out of range at the source etc NOTE The invalid value is defined in terms of the raw signal units as specified in the database definition Subsequently scaling the output e g by using calibration definitions that convert units also scales the invalid value accordingly Raw Data Type The raw data type is typically the data type defined in the database i e 8 bit unsigned 16 bit unsigned or 32 bit unsigned However for database bit sizes other than 8 16 or 32 the eDAQ lite promotes the raw data type to one of these three bit lengths For example a 1 bit unsigned is promoted to 8 bit unsigned and a 24 bit unsigned is promoted to 32 bit unsigned Convert Raw Data to 32 Bit Float Select the convert option to set the output data type to 32 bit float The conversion adds some computational overhead but this is relatively insignificant to overall eDAQ lite performance at the low sample rates typically used for bus inputs Vehicle Bus Message Channel Use vehicle bus message channels to acquire raw vehicle bus packets After selecting the desired channel type complete the ID connector and description fields
56. new run a channel display or any calibration task For networked eDAQ lite eDAQ systems the shunt resistors are installed sequentially from one network node to the next ly NOTE WwW a Although this task requires a fairly small amount of eDAQ lite processing it can result gr Le in a DeviceOverFlow error reset for tests running at the edge of the eDAQ lite processing limit e An internal shunt resistor applied across the Ex to Sig leg of the bridge results in a downscale shunt In other words the voltage output from the bridge swings in the negative direction when the shunt is applied Take this into consideration when setting the sign of the associated engineering value e Ifthe measured voltage span and the theoretical ideal voltage span do not agree within the specified percentage found in the TCE General Preferences TCE issues a warning message Preshunt Value Specify a preshunt value to define a single point on the calibration line in conjunction with one of the shunt span modes e g 40 kilohm span Enter the engineering units equivalent The voltage used is the preshunted voltage measured in the shunt span step This mode is recommended to reduce the entire calibration to one step Shunt Tools For a bridge channel use the shunt tools option as a guide to indirectly select a shunt span mode e g 40 kilohm span with an associated engineering equivalent value The two options for shunt calibration are based on a known s
57. of bins for each DataMode Peak Valley Matrix The Peak Valley Matrix DataMode stores multiple channels of peak valley reversal histograms in the output data file The eDAQ lite acquires peaks and valleys from triggered or un triggered time history data streams using the user specified hysteresis value and the peak valley processing algorithm The resulting peak valley stream 12773 2 0 en x e z SoMat eDAQ lite 12773 2 0 en 8 4 3 defines the set of peak valley reversals which are histogrammed using the user defined options for the type and size of histogram For more information on the peak valley processing algorithm see Peak Valley Processing Algorithm on page 203 Input Channel The input channel data type must be 32 bit float or 16 bit integer If using the user defined bins option the input channel data type must be 32 bit float Histogram Mode Select one of three available histogramming modes Mode Description Range Mean Accumulate reversal counts in bins with both a reversal range dimension and a cycle mean value dimension Range Only Accumulate reversal counts in bins with only a reversal range dimension To From Accumulate reversal counts in bins with both a to dimension and a from dimension The eDAQ lite assigns to and from designations to each reversal Hysteresis Specify the desired hysteresis level for the peak valley processing algorithm Number of Bins Specify the desired num
58. retains its current value Input Channel The velocity input channel data type must be 32 bit float The direction input channel data type must be either 32 bit float or 32 bit integer Output Data Type The output channel data type is 32 bit float NOTE It is strongly recommended that the direction input channel have a data type of 32 bit integer which is the raw data type of the quadrature decoder Pulse Counter channel Using a 32 bit float works only if the quadrature decoder output stays in the approximate range of 16000000 counts The 32 bit integer data type allows use of the full range of the quadrature decoder pulse channel of 2147483647 to 2147483648 counts Check for Int32 Rollover If the direction input channel is a 32 bit integer channel use the int32 rollover check to detect rollover of the signed 32 bit counter If the counter jumps by more than 24000000 counts from one sample to the next the eDAQ lite assumes that the counter has rolled over For example if the counter jumps from 2100000000 to 2140000000 the eDAQ lite detects a rollover and sets the sign to positive NOTE Use the rollover check option on an as needed basis as it does add some processing overhead to the channel 123 SoMat eDAQ lite I Pulse Counter Application Note Quadrature Encoder This Directional Velocity channel was developed primarily to provide a signed RPM output channel using a quadrature encoder connected to a EDIO la
59. sample Thermocouple Channels For standard thermocouple input channels the eDAQ lite uses only one data sample to provide a single signal value for calibration purposes Running a Test Use the controls in the Test Control menu or in the toolbar to perform test run tasks Alternatively use the Control Panel opened from the Test Control menu for quick access to common test run tasks The Control Panel also shows the amount of RAM and PC Card memory available for data storage xi open See re DD nn Gi EA End Upload Available Memory RAM 95 54 PCM 99 06 Run Time Figure 4 1 TCE Control Panel for quick access to test run tasks Running a test using the existing test setup definition consists of the following steps 12773 2 0 en x e z SoMat eDAQ lite 12773 2 0 en 4 3 1 Initializing a Test The initialization process prepares the eDAQ lite for a test run Select Initialize from the Test Control menu or toolbar to begin initialization which consists of the following steps e Verify that the current test setup is saved to a disk file and there are no internal inconsistencies in the test setup such as uncalibrated channels or unresolved ID references e Check that the eDAQ lite real time clock agrees with the real time clock in the support PC within the user specified tolerance e Purge the eDAQ lite RAM disk and PC Card removing previous test setup and SIF data files Transfer the requ
60. setup window F4 Upload test data CTRL 7 ae Open DataMode setup window F3 rm sa vem ag ea ro End test CTRL E 12773 2 0 en x e z SoMat eDAQ lite 3 1 4 3 2 12773 2 0 en Button Command Button Command Open control panel CTRL 0 g Get eDAQ lite log CTRL L L 6 Get test status CTRL 1 a Call Infield EASE DataXplorer Open help CTRL H H Io Status Bar The status bar is at the bottom of the TCE window and displays information about the test setup status The status bar is divided into three sections Communications Mode The communications mode displays the IP address or host name of the active eDAQ lite When TCE is actively communication with the eDAQ lite the background color of the entire status bar changes When communicating with the eDAQ lite specified in the TCE communications settings the status bar turns red When communicating with other eDAQs for network control or monitoring purposes the status bar turns either blue green yellow or orange based on the assigned index to the network node Test Modified The test modified section indicates by displaying the word Modified that the current test setup has been modified from its last saved state General Information The general information indicator provides TCE status information with a brief description of the current action or the action just completed TCE Preferences The TCE Preferen
61. switching for at least this period of time This feature can eliminate state switching transients in the output channel data stream If the latch period is 0 0 then the output state switches on each sample Statistical Analysis The Statistical Analysis channel generates statistical output data from source transducer or computed channel input data Input Channel The input channel data type must be 32 bit float Output Data Type The output data type is 32 bit float Statistic Select one of six available statistical modes The following table defines the algorithms used to compute the statistical values where Vis the number of data samples in the analysis window and X nean is the mean of the data in the analysis window 125 I SoMat eDAQ lite 126 Statistic Algorithm Mean 1 gt ar Xi N i Standard deviation Pr P YX X mean J Zee RMS z 1 N X t 1 Kurtosis N N r r 212 K N Ti Imean ID Ti Imean f i l i l Skewness m er Py a B 1 Py _ _ Xi X mean P EN re ox Xi Xmean 2 3 i 1 N i l Xth percentile TCE sorts the data samples in the analysis window in ascending order and interpolates as required between the array element data values that border the exact Xth percentile array element For more information on processing limitations when using the Xth percentile mode see Xth Percentile Benchmark Tests on page 201 Percentile Specify the X
62. the eDAQ lite and all test data has been safely uploaded from the eDAQ lite Format RAM Disk Format the RAM disk on the eDAQ lite unit and erase all files including some test data files from the RAM disk This option is available at all times even while a test is running Because the eDAQ lite formats the RAM disk in the normal process of test initialization formatting the RAM disk is not typically necessary 10 1 Diagnostics Access commands for troubleshooting purposes 10 1 Test FTP Perform a diagnostic test on the eDAQ lite file transfer process FTP functionality This option is not available when a test is initialized Check RAM Disk Check the integrity of the eDAQ lite RAM disk Upload Log Save the eDAQ lite log which contains messages warnings and errors from TCE and the eDAQ lite to a PC disk file Preferences 12773 2 0 en Communication Preferences Configure the Ethernet communications with the eDAQ lite 3 2 1 General Preferences Configure TCE application preferences 3 2 2 FCS Specific Preferences Configure TCE preferences specific to the target eDAQ lite 3 2 3 Remote Test Run Control Configure the preferences for using remote control 3 2 4 Scope and Spectrum Configure the settings for scope and spectrum displays 3 2 5 Run Time Display Configure the settings for run time displays 3 2 6 Group DVM Display Configur
63. the labelling on the front panel and the display e When cleaning ensure that no liquid gets into the equipment or connections I SoMat eDAQ lite p gt gt gt Remaining dangers The scope of supply and performance of the data acquisition system covers only a small area of measurement technology In addition equipment planners installers and operators should plan implement and respond to the safety engineering considerations of measurement technology in such a way as to minimize remaining dangers Prevailing regulations must be complied with at all times There must be reference to the remaining dangers connected with measurement technology After making settings and carrying out activities that are password protected you must make sure that any controls that may be connected remain in safe condition until the switching performance of the amplifier system has been tested In this manual the following symbols are used to point out remaining dangers DANGER Meaning Maximum danger level Warns of an imminently dangerous situation in which failure to comply with safety requirements will result in death or serious bodily injury WARNING Meaning Dangerous situation Warns of a potentially dangerous situation in which failure to comply with safety requirements can result in death or serious bodily injury CAUTION Meaning Potentially dangerous situation Warns of a potentially dangerous situation in which failure to co
64. the line is high i e logical TRUE or no check when the line is low i e logical FALSE 4 5 4 Scope Plot The scope plot display is similar to that of an analog oscilloscope except that the display is not updated until the eDAQ lite acquires all of the data samples and transfers them to TCE which creates a delay in the data presentation The scope plot is available for a single channel at pre initialization as a prerun option and as a run time display For more information on scope plot display preferences see Scope and Spectrum Display on page 51 12773 2 0 en SoMat eDAQ lite I o M Auto Seale Samples Start Run 2 J Grd Lines 200 Y lolev_1 Note Select the Hold View Mode to Enable other Options 2500 microstrain 2500 milliseconds 2666 Figure 4 4 A TCE scope plot as a run time display Samples Select the desired number of samples to display on each scope scan Auto Scale Select the auto scale option to switch to automatic y axis scaling mode which sets the y axis limits to the maximum and minimum values in the data set for each scope scan Grid Lines Select the grid lines option to add grid lines to the scope display The grid lines divide each axis into ten equal parts If using the auto scale option TCE only displays the x axis grid lines 4 5 5 Spectrum Plot The spectrum plot display shows the frequency content of the signal TCE scales the x axis from 0 Hz t
65. the pulse rate mode the channel must have a large number of pulses in each sample period To cover both low and high frequency inputs route the input signal into two pulse counter channels one configured in frequency mode and the other in rate mode and use the following expression in a Desk Calculator computed channel see Desk Calculator on page 116 X_r gt R_max X_r X_r lt R_max X_f where X_ris the rate mode X_f is the frequency mode and R_max is the crossover point where X_r is used instead of X_f Set R_max to minimize accuracy loss For example if the sample rates are both 100 Hz then set R_max to 25000 Hz where the accuracy of X_f is 0 5 and the accuracy of X_r is 0 4 6 3 Analog Input Channels 6 3 1 Bridge Add a bridge channel to any ELBRG connector For more information on the ELBRG layer see ELBRG Bridge Layer on page 90 NOTE f N L a Each channel on the ELBRG layer can have an independent sample rate and digital gr Su filter selection Output Data Type Select an output data type of 16 bit signed 32 bit float or 8 bit signed The fundamental data type for bridge channels is 16 bit signed which consumes the least amount of data storage while maintaining full 16 bit data resolution The 32 bit float data type adds a great deal of computational overhead and is not recommended for high rate data collection Use the 32 bit floating point option only if the input channel is t
66. to the ELCPU It is strongly advised to follow this convention 25 I D SoMat eDAQ lite 26 Updating Firmware HBM regularly releases updates to the SoMat eDAQ lite firmware that expand functionality and fix known bugs To download compatible firmware and software visit www hbm com somat NOTE The eDAQ lite firmware uses an alpha numeric version number e g 3 11 A while TCE uses a numeric version number e g 3 11 0 For compatibility the first two numbers of the eDAQ lite and TCE version numbers must be identical e g 3 11 After running the installer on the support PC to copy the files to the SoMat directory follow the steps below to upgrade the eDAQ lite firmware Always update the ELCPU firmware before updating any layer level firmware CAUTION If updating from an earlier release version do not attempt to perform the upgrade if the eDAQ lite is in need of time critical testing An upgrade failure of the eDAQ lite firmware can render the eDAQ lite inoperable until it is upgraded at the factory Updating ELCPU Firmware To update the ELCPU MPB firmware 1 Power cycle the eDAQ lite 2 Open the eDAQ lite web interface to the Hardware tab and click on the Code column for the MPB For more information on the eDAQ lite web interface see eDAQ lite Web Interface on page 159 3 Browse to the correct firmware file on the PC and click Update Wait for the eDAQ lite to return to the ready state 4 Refr
67. type Factor Specify the desired down sample factor Up Sampler The Up Sampler channel increases the number of samples taken from the input channel by a user defined factor enabling correlation of input data with that of a channel with a higher sample rate on a point for point basis Each input channel sample repeats a number oftimes during the interval between the first sample and the next one based on a conversion factor value For example a factor of three causes the channel to repeat the sample twice after the original giving three samples per original sample as shown in the graphic below Figure 7 2 An illustration of the Up Sampler computed channel NOTE Storing the output in memory increases the memory required for test data proportional to the up factor Using the output only for intermediate calculations does not affect data storage memory Input Channel The input channel can be any data type Output Data Type The output data type is the same as the input data type Factor Specify the desired up sample factor Smoothing Filter The Smoothing Filter channel generates an output channel that is a smoothed representation of the input channel without generating any phase lead or lag The filter is a simple boxcar filter where each output sample is the linear average of a user specified number of input samples For example for a tap count of five the filter averages the current sample the two samples before and the two s
68. using digital input and output lines For more information or remote control preferences see Remote Test Run Control on page 50 12773 2 0 en T o S SoMat eDAQ lite 12773 2 0 en N INS i 4 8 ZN Networking eDAQ lite eDAQ Systems Networking allows multiple eDAQ lite eDAQ systems to acquire data synchronously using a single master sample rate MSR clock source TCE supports defining the test setup configurations for networked systems in a single test setup file and coordinates most test control tasks for the network For information on setting up the networked systems see Networking eDAQ lite eDAQ Systems on page 35 NOTE When an eDAQ lite is configured as either a master or a slave and a power failure or an error reset occurs the eDAQ lite does not attempt to start a new test run The first step is to define the set of eDAQ lite eDAQ systems used in the test in the network setup window The networked nodes can consist of any combination of eDAQ and eDAQ lite systems Configure one node as the master or the GPS master and the rest of the nodes as slaves The choice of which system is the master is largely arbitrary NOTE All nodes in a network configuration must have the same master sample rate value Proceed to define the transducer channels computed channels and DataModes for the test in the same manner as for a single eDAQ lite Multiple channel interactive setup tasks such as the group DVM
69. vehicle bus module if any is defined in the current hardware setup Input Output Configuration bank Configure the eight channels on connectors 1 4 and 5 8 as either inputs or outputs Configure a line as an input by checking the corresponding box or as an output by deselecting the corresponding box The channels on connector 9 12 are input only Input Threshold Mode bank Select the desired mode for defining the input threshold limits Selecting either the TTL or zero crossing options results TCE assigning specific upper and lower limits Selecting the user defined option allows for a user configurable upper limit Input Threshold Limits bank When using the user defined threshold mode specify the upper input threshold limit to determine when an input channel switches from a logical value of TRUE to a logical value of FALSE and vice versa The difference between the upper and lower limits is fixed at nominal one volt The maximum upper limit is 4 8 volts and the minimum upper limit is one millivolt The input threshold value assigned for any given bank applies to all input bits for that bank Individual input bits in the same bank cannot have different input threshold values NOTE If a vehicle bus module is connected the eDAQ lite configures bank A with a 2500 millivolt upper input threshold 86 12773 2 0 en I SoMat eDAQ lite 12773 2 0 en Ky ne Ky ne A N AIN Power Vol
70. 5 3 2 TCE Preferences 45 3 2 1 Communications 46 3 2 2 General 46 3 2 3 FCS Specific 48 3 2 4 Remote Test Run Control 50 3 2 5 Scope and Spectrum Display 51 3 2 6 Run Time Display 52 3 2 7 Group DVM Display 52 3 2 8 Auto Range Options 53 4 Using TCE 55 4 1 Defining a Test 55 4 1 1 Adding a Network Node 55 4 1 2 Configuring the Hardware 56 4 1 3 Creating Channels and DataModes 57 4 1 4 Using Existing Setup Definitions 58 4 2 Calibrating Input Channels 59 4 12773 2 0 en SoMat eDAQ lite HBM 4 2 1 Calibration Modes 59 4 2 2 Calibration Control 62 4 2 3 Calibration Specifications 64 4 3 Running a Test 64 4 3 1 Initializing a Test 65 4 3 2 Prerun Options 65 4 3 3 Previewing a Test Run 66 4 3 4 Starting a Test Run 67 4 3 5 Using Interactive Triggers 67 4 3 6 Stopping a Test Run 67 4 3 7 Ending a Test 68 4 4 Monitoring Test Status 68 45 Viewing Channel Displays 68 4 5 1 Displays Overview 69 4 5 2 Common Display Options 70 45 3 DVM 71 4 5 4 Scope Plot 72 4 5 5 Spectrum Plot 73 4 5 6 Digital Readout 74 4 5 7 Bar Chart 75 4 5 8 Strip Chart 76 4 6 Uploading Test Data 77 4 6 1 Uploading SIE Data Files 78 4 6 2 Uploading SIF Data Files 78 4 6 3 Extracting Data from SIE or SIF Files 79 4 7 Using Remote Control Operation 80 4 8 Networking eDAQ lite eDAQ Systems 81 12773 2 0 en 5 SoMat eDAQ lite
71. EPWR15 2 has a 15 pin D Sub connector for connection to the Power port on the eDAQ lite and two sets of pigtail wires one for main power and one for remote power The following table lists the pinouts for the EPWR15 cable 12773 2 0 en SoMat eDAQ lite 12773 2 0 en _ aon owt ODN 12 3 12 3 1 Cable Function Pin Wire Color Main Power Cable gray Main Power 1 Red Main Power 8 Black Remote Power Control Cable black Remote Power 6 Red Remote Power 14 Black Pin 3 is jumpered to pin 4 NOTE Though the current EPWR15 cables use only one pin each for power and ground the Power connector on the eDAQ lite can receive Main Power on pins 1 2 and 9 and Main Power on pins 7 8 and 15 ELHLS High Level Analog Layer Transducer Cable The ELHLS layer uses a SoMat SAC TRAN MP Transducer Cable 1 SAC TRAN MP 2 2 or 1 SAC TRAN MP 10 2 with an M8 connector and a set of color coded pigtail wires The following table lists the pinouts for the SAC TRAN MP cable when used for an ELHLS input Function Pin Wire Color reserved 1 Brown Signal Input 2 White Shield 3 bare wire Ground 4 Black Power 5 Red Signal Input 6 Green ELBRG Bridge Layer Transducer Cable The ELBRG layer uses a SoMat SAC TRAN MP Transducer Cable SAC TRAN MP with an M8 connector and a set of color coded pigtail wires The following table lists the pinouts for the SAC TRAN MP cable when used for an ELBRG
72. HLS Creating Channels and DataModes Adding Channels and DataModes Transducer channels computed channels and DataModes are all added and modified in much the same way In the appropriate window click add to Add a new channel or DataMode TCE first presents a list of the types of channels or DataModes Selecting the desired type opens the configuration window for that type of channel or DataMode When adding a transducer TCE presents a list of common channel configurations Select a pre defined or blank configuration from the list Either option allows modification For more information on specific parameters for each channel and DataMode see chapters Input Channels on page 95 Computed Channels on page 115 and DataModes on page 145 Copying Channels and DataModes When creating many channels or DataModes with similar properties use the Copy option available in each window For computed channels and DataModes TCE only allows the creation of one copy at a time For transducers TCE allows the creation of multiple copies The number of copies defaults to the maximum allowed TCE automatically assigns a connector to each a new channel Choose the default IDs mode as detailed below 57 x SoMat eDAQ lite Default IDs Mode Description All Fields Blanked Create the copies with blank ID names Manually enter the ID names in the next window All Fields Same as Create the copies with ID names identical
73. History 148 8 3 3 Event Slice 151 8 3 4 Message Logger 152 8 3 5 Peak Valley 152 8 3 6 Peak Valley Slice 152 8 4 Histogram DataModes 154 8 4 1 Common Histogram Parameters 154 8 4 2 Peak Valley Matrix 154 8 4 3 Rainflow 155 8 4 4 Time at Level One Dimensional 156 8 4 5 Time at Level Multidimensional 156 85 Digital Output 157 9 eDAQ lite Web Interface 159 9 1 Main Page 159 9 2 System Tab 159 9 2 1 System Setup 160 9 2 2 System Status 161 9 2 3 System Maintenance 161 9 3 Hardware Tab 161 9 3 1 Hardware Table 162 9 3 2 Select Storage Device 163 9 4 Channels Tab 163 95 Test Tab 163 9 6 Data Tab 163 9 6 1 SIE Test Data 164 12773 2 0 en 9 x u SoMat eDAQ lite 9 6 2 SIF Test Data 164 9 7 Custom Tab 164 9 8 Help Tab 165 10 Troubleshooting 167 10 1 Troubleshooting Procedure 167 10 2 Known Problems 168 10 3 eDAQ lite Flags 168 10 3 1 Status Flags 168 10 3 2 Error Flags 170 10 4 Corrupt SIF File Data Recovery 171 10 5 Tips on Eliminating eDAQ lite OverFlow Errors 172 11 Data Types 175 12 Cable Pinouts 179 12 1 ELCPU Main Processor 179 12 1 1 Communications Cable 179 12 1 2 Power Cable 180 12 2 ELHLS High Level Analog Layer 181 12 2 1 Transducer Cable 181 12 3 ELBRG Bridge Layer 181 12 3 1 Transducer Cable 181 12 4 ELDIO Digital I O Layer 182 12 5 Vehicle Bus Modules VBM 182 12 5 1 Transducer Cable for VPW Interface 183 12 5 2 Transd
74. I file for this example is as follows 0 60 60 120 120 180 180 240 240 300 300 360 ou amp amp N PE Input Channel The input channel data type must be 32 bit float Output Data Type The output channel data type is 32 bit float 124 12773 2 0 en I SoMat eDAQ lite 12773 2 0 en Soy ne 7 2 8 ASCII File Specify the full path name of the ASCII file that defines the mapping conditions Use the Browse button to select the desired file Use the Check File option to parse the ASCII file and verify that the format is valid NOTE Because TCE parses the ASCII file at test initialization any changes to the file prior to initialization are effective for subsequent test runs Use Default Output Select the default output option to output a default value when the input channel does not meet any of the mapping conditions If not selected the output remains in its existing state Default Out Specify the default value for the output The channel outputs the value if the first input sample does not meet any mapping conditions Also when using default out the channel outputs the default value throughout the test run when the input does not meet any mapping conditions Latch Period Specify the time in seconds that the input channel must consistently map to the same output state before the output state switches The latch period is similar to a duty cycle on the output state preventing the output state from
75. Mat eDAQ lite 114 12773 2 0 en HBM SoMat eDAQ lite 7 Computed Channels 12773 2 0 en 7 1 This chapter details the available computed channels and their associated parameters A computed channel is a data channel derived from one or more transducer channels or from previously defined computed channels For example a computed channel can generate a channel having a higher or lower sample rate using Up Sampler or Down Sampler be constructed from data using a mathematical formula or expression using the Desk Calculator or integrate data samples using the Integrator Define computed channels in the computed channel setup window NOTE Defining computed channels in a test setup is optional Common Computed Channel Parameters The following parameters are common to all computed channels Network Node This field displays the IP address or host name of the eDAQ lite for which the channel has been defined ID Enter a unique identifier for the channel The name must conform to ID naming conventions Valid ID names e are case sensitive e are limited to a maximum of 12 characters e contain only valid characters i e letters a z A Z digits 0 9 and the underscore _ character e start with a letter e are not duplicates of system reserved names sin cos log etc Description Enter a more detailed description of the computed channel TCE sets the description field to match the input channel description but
76. Multidimensional The Time at Level mD DataMode stores a multiple dimension Time at Level histogram in the output data file Input Channel The input channel data type must be 32 bit float or 16 bit integer If using the user defined bins option the input channel data type must be 32 bit float Number of Bins Select the desired number of bins for each dimension Separate the individual bin count specifications by spaces or commas The total number of bins for each dimension is the user specified number of bins plus two for underflow and overflow bins The total number of bins for the DataMode is the product of the total number of bins for each dimension For example defining the number of bins for four input channels as 10 20 5 and 15 results in 31416 i e 12 22 7 17 total number of bins 12773 2 0 en T o SoMat eDAQ lite 12773 2 0 en 8 5 Digital Output A Digital Output is a pseudo DataMode Digital outputs are compatible with the first eight bits on the ELDIO bank For more information on ELDIO digital outputs see Digital Input Output on page 85 Use the Digital Output definition window to define all desired digital outputs For each desired output target bit specify the associated logical control channel output mode initial state and stop run action Use the control channel select area of the window or type the desired values directly into the digital output list NOTE When using the control channel select
77. OC OD OE OF 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27 28 29 2A 2B andsoon RX 8 0000000 00 01 02 03 04 05 06 07 08 09 OA OB OC OD OE OF 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27 28 29 2A 2B andsoon 80 Generate Quickview Log File SIF only The generate quickview log file option parses the SIF file channel list and generates an ASCII log file that summarizes the channel list with presentation of some of the channel header information combined with a small amount ofthe actual data for each channel This option is provided primarily for troubleshooting corrupt SIF data files 4 7 Using Remote Control Operation Start and stop test runs remotely using the remote control operational mode The remote control mode uses digital I O lines for control inputs and status outputs The eDAQ lite uses the digital lines on the lowest addressed ELDIO layer i e DIO_1 Use one digital input line to control test run starts and stops and up to four digital output lines for status indications Configure the digital input and output line assignments in the TCE Remote Control Preferences dialog The remote control mode is enabled at test initialization and remains in effect until the test ends unless manually suspended When the remote control mode is active many of the test control tasks are disabled The Remote Control Setup preferences configure the eDAQ lite for remote control of test runs
78. PC Serial Communications The eDAQ lite supports an RS232 communications option The default baud rate is 115200 configurable to lower baud rates to support serial bus modules The serial port can also be configured as a data input port using hardware and transducer channel interfaces similar to vehicle bus inputs Changing the eDAQ lite IP Address and Host Name In order to change the IP address or host name of the eDAQ lite first establish communication between the eDAQ lite and the support PC The following sections describe the appropriate steps to follow for each of the methods of communication Using an Ethernet connection 1 Open a web browser on the support PC 2 Enter the IP address of the eDAQ lite in the address field The default IP address programmed into the eDAQ lite nonvolatile memory during production is noted on a tag attached to the eDAQ lite typically 192 168 100 100 NOTE The support PC must be configured to be able to reach 192 168 100 100 from the Ethernet port on the PC This typically requires reconfiguration of the network interface Refer to your operating system documentation or see your network administrator for help 3 Click the System tab to open the eDAQ lite system setup page Select Network Setup to open the eDAQ lite network setup page 5 Make changes to the hostname IP address netmask and gateway Check with the network administrator for the appropriate settings for these fields Use the
79. Pole Filter The Butterworth digital filter closely matches the attenuation and step response characteristics of a conventional analog Butterworth filter The magnitude phase and step responses are shown below Magnitude dB Solid Blue Theoretical 90 Dashed Green FIR approximation Dash Dot Red 3dB alle 2 3 4 10 10 10 10 Frequency Hz Figure 15 1 Magnitude response of an approximate eight pole Butterworth filter The 3 dB frequency break frequency is 1500 Hz The sharper than exact roll off in the transition band is achieved by filtering the data stream using linear phase filters before applying the approximate Butterworth filter 12773 2 0 en SoMat eDAQ lite I o 100 200 300 400 Phase Angle Degrees 500 Solid Blue Theoretical 600 Dashed Green FIR approximation 10 10 10 10 Frequency Hz Figure 15 2 Phase response of an approximate eight pole Butterworth filter Note that the phase error is reasonably small up to the break frequency 1500 Hz The phase match between any two ELHLS channels using this filter is exact 12773 2 0 en 197 I D SoMat eDAQ lite 198 Sample Solid Blue Theoretical Dashed Green FIR approximation 0 10 20 30 40 50 60 Sample Number Figure 15 3 Unit step response of an eight pole Butterworth filter approximated by a 35 coefficient FIR filter The unit step response closely resembles that of an analog Butterworth filter Lin
80. Q lite system For more information on eDAQ lite capabilities contained in the ELCPU such as battery power Ethernet communications and on board memory see Using the eDAQ lite on page 23 Available Inputs The ELCPU includes a serial port Comm which can be used as an input for serial bus data HSS Comm Power Figure 5 1 Diagram of the connectors on an ELCPU PLUS or ELCPU layer including the 9 pin D Sub Comm port used for serial bus inputs Serial Bus The RS232 serial port can be configured as a data input port to acquire serial data streams from various sources Specialized code must be written to deal with the specifics of the particular serial data streams Therefore serial data sources are supported on a custom basis for such things as serial GPS or customer specific vehicle buses Refer to the installation instructions in the firmware installation directory for more information on installing custom modules Connect serial data source to the eDAQ lite using the Comm connector on the front panel of the ELCPU layer Configuration Options The ELCPU offers several configuration options through the hardware setup window The serial bus port appears as a separate entry in the hardware setup window and has its own configuration options which are identical to the vehicle bus configuration options For more information on these options see Configuration Options on page 90 83 x u SoMat eDAQ lite 84 5 2 Pip
81. SoMat P N DOC 0005 01 12773 2 0 en SOMAT English SoMat eDAQ lite with TCE Software I W S x SoMat eDAQ lite 12773 2 0 en SoMat eDAQ lite HBM Contents Page Safety Information 13 1 Getting Started 17 1 1 Overview 17 1 1 1 eDAQ lite Layers 17 1 2 Equipment 17 1 2 1 Provided Equipment 17 1 2 2 Support Equipment 18 1 3 Setting Up the System 18 1 8 1 Installing SoMat Test Control Environment TCE 19 1 3 2 Getting Familiar with the eDAQ lite System 19 1 3 3 Setting Up the eDAQ lite 20 1 4 Test Process 20 2 Using the eDAQ lite 23 2 1 eDAQ lite Base System 23 2 1 1 Status LEDs 23 2 1 2 eDAQ lite Layer Addressing 24 2 1 3 Updating Firmware 26 2 2 Communications 27 2 2 1 Communications Methods 27 2 2 2 Changing the eDAQ lite IP Address and Host Name 27 2 3 Power Considerations 28 2 3 1 Input Power Voltage 28 2 3 2 Battery Power 29 2 3 3 Remote Power 30 2 3 4 Powering an eDAQ lite from a Vehicle 31 2 4 Data Storage 33 12773 2 0 en 3 SoMat eDAQ lite HBM 2 4 1 Data Formats 33 2 4 2 Data Storage Options 34 2 5 Networking eDAQ lite eDAQ Systems 35 2 5 1 Hardwired Network 35 2 5 2 Wireless Network 35 3 Test Control Environment TCE 37 3 1 TCE User Interface 37 3 1 1 Setup Windows 37 3 1 2 Pull Down Menus 40 3 1 3 Toolbar 44 3 1 4 Status Bar 4
82. a preview run When starting a test run TCE presents a start test run dialog window displaying the next run number and allowing the input of a short run description up to 63 characters per run NOTE Use TCE General Preferences to suppress the start test run dialog window The data acquired on multiple runs is stored in a single SIF data file Each channel of acquired data is tagged with the designated run number Run descriptions are stored in a fixed 2048 character record of the SIF data file allocated when the test is initialized The run descriptions can be extracted from the SIF data file using an EASE procedure file that is resident in the TCE installation directory Using Interactive Triggers TCE interactive triggers allow user input from the software to control a computed channel or DataMode through the use of an Interactive Trigger computed channel There are eight Boolean logic controls available which must be assigned to an Interactive Trigger computed channel When the test is initialized TCE sets all the triggers to FALSE Select Interactive Triggering from the Test Control menu to control the trigger states before or during a test run Use the check box by each trigger index and clack Apply Triggers Now to change the trigger state A check indicates a TRUE state TCE grays out the triggers not defined in the test setup To invert the trigger logic i e a check for a FALSE state use the invert trigger parameter in the Interactiv
83. age NOTE SIE file data always uses the DRAM buffering option mh IN CAUTION All test data in DRAM memory is lost if the eDAQ lite powers down or resets for any reason Selecting the DRAM buffering option is advised as long as the DRAM allocations required are not too large Updating the circular buffer allocated in DRAM is very efficient as is copying the circular buffer filled with a burst record to the PC Card memory in a linear manner Allocating the circular buffer directly in the PC Card file system memory is somewhat less efficient in general because of the overhead in constantly writing to the PC Card memory Furthermore for rotating disks the seeks required when the circular buffer wraps around will adds a periodic burden to performance efficiency Also note that repetitively overwriting the same flash memory area produces wear and reduces the life of the flash memory NOTE N aN a When considering DRAM buffering note that the eDAQ lite can only copy full burst pA Au records for DRAM to PC Card memory Not using the DRAM buffering mode allows the eDAQ lite to store partial burst records if for example the test run stops before the burst is full Application Note Guidelines for Setting the DRAM Buffering Option If the total DRAM allocation for all Burst History channels for a single burst record is 500 kB or less selecting the DRAM option is advised for maximum throughput efficiency If the total DRAM all
84. al update rate The receiver continuously tracks and uses up to 12 satellites to compute and update position The receiver has a serial interface connection routed to the ELDIO front panel Another feature available with the GPS receiver is GPS based master sample rate clock generation Use the configuration options of the parent layer ELDIO to enable GPS clock generation Notes on the Old GPS Module The old GPS module has an antenna connection routed to the ELDIO front panel This GPS module is a low power consumption 12 channel GPS receiver that is WAAS enabled Navigational updates are fixed at a rate of 1 Hz At highway driving speeds this older GPS module does not always maintain sufficient communications lock on the GPS satellites to consistently acquire GPS updates at a reasonable rate This results in the GPS data going stale with invalid data fills brought into play This appears to happen more frequently at highway speeds but has been observed in other test scenarios Furthermore it can sometimes take a very long time for the GPS module to re acquire satellite communications lock several minutes in some cases 5 3 1 Available Inputs GPS Available GPS channels include latitude longitude altitude speed m s mph or knots heading year month day hour minute second nanosecond and number of satellites For more information on setting up GPS inputs see Bus Oriented Input Channels on page 108 NOTE fan Positio
85. am of the M8 connectors on an ELBRG layer Each independent channel contains programmable excitation an eight pole Butterworth analog guard filter a 16 bit A D converter software selectable digital filtering and output sample rate options of up to 100 kHz The ELBRG layer supports full and half bridge types with a resistance from 100 to 10000 ohms and quarter bridges with a resistance of either 120 or 350 ohms All bridge configurations are accomplished using programmable switches i e there are no jumpers however the quarter bridge choice of 120 or 350 ohm completion resistor is a factory installed option A set of internal shunt resistors with selectable shunt direction is available for calibration purposes For more information on setting up ELBRG input channels see Bridge on page 101 For information on wiring ELBRG inputs see ELBRG Bridge Layer on page 188 ELHLS High Level Analog Layer The ELHLS offers four simultaneously sampled high level differential analog inputs through independent connectors The ELHLS layer supports a wide variety of inputs including thermocouples strain gages accelerometers microphones and amplified and unamplified transducers Single channel IEPE Integral Electronics Piezoelectric adapters and a variety of SMART modules are also available Connect transducers to the ELHLS individually using the M8 connectors located on the front panel HLS 1 2 3 4 Figure 5 4 Diagram of the M8
86. amples after Note 12773 2 0 en SoMat eDAQ lite x e z that the channel backfills the initial output samples with the first fully filtered output value For example if the tap count is nine the first four output samples are assigned the same value as the fifth output sample value Vly NOTE N A d The Smoothing Filter can result in loss of data significance if not used properly In DA eJ general it should not be necessary for analog input channels that use digital anti aliasing filters It is provided primarily for digital pulse counter inputs Input Channel The input channel data type must be 32 bit float or 16 bit integer Output Data Type The output data type is the same as the input data type Filter Length Specify the desired length of the boxcar filter The number must be an odd number between 3 and 201 7 4 6 Digital Filter The Digital Filter computed channel generates an FIR digitally filtered output channel based on an ASCII file The file format conforms to the conventions used by MATLAB to generate ASCII filter files including the following e All fields are floating point values using only whitespace delimiters e g spaces tabs newlines etc e The first field is the number of tap coefficients There must be at least two taps e The second field is the filter delay which synchronizes the filtered output data with the input data The value can range from zero to the number of taps minus one e The
87. are performed and the average data skew over the set of test runs is the characterized data skew value Analog Channel Synchronization The ELHLS and ELBRG channels all employ pre start periods to compensate for their analog guard filters In addition to the guard filter skew there are some other secondary factors that influence data synchronization such as A D converter conversion time and transport delays through gain amplifiers NOTE This discussion assumes no digital filtering Ideally linear phase digital filters do not result in phase shifts For the ELHLS and ELBRG channels however the linear phase filters for sample rates at or below 10000 Hz result in a five microsecond lead data skew The Butterworth digital filters are designed to match their analog equivalents and therefore these filters do generate significant phase shifts which in turn significantly affect synchronization with other transducer channels Following is a table that contains actual data skew characterization test results in microseconds for one eDAQ lite stack The data in this table is consistent with the data skew times discussed in this section The first channel on the first ELHLS layer was arbitrarily used as the data sync time reference channel The test covered the channels on two ELHLS layers and the channels on one ELBRG layer The data sync was characterized using three different sample rates for both the 100 kHz and the 98 304 kHz master sample rates
88. articularly critical for long term or high sample rate testing where relatively small values are added to an ever increasing sum It is strongly recommended to use the 64 bit float for sum option whenever possible Using the Integrator to Measure Accumulated Pulse Counts The use of the Integrator computed channel to yield accumulated counts varies based on the selected output data type e 32 Bit Unsigned The most efficient way to use the Integrator computed channel is with this data type the integrator can then accumulate up to 4294967295 counts This is the suggested approach for simply counting pulses or events The scaling to hertz is performed by an associated scale factor used only when needed such as for DataMode storage Therefore the output data stream is the stream of unsigned integer counts 12773 2 0 en 121 HBM SoMat eDAQ lite 32 Bit Float If the this output mode is used then the scale factor field in the Integrator should be set to the reciprocal of the pulse counter sample period to yield counts additional scaling can be incorporated into the scale factor field for conversion to distance revolutions etc It should also be kept in mind that a 32 bit float can only accumulate about 16 7 million counts before it saturates as an integral counter The scaling to hertz is performed on a sample by sample basis as the data is acquired For more information on pulse counter inputs see Pulse Counter on page 99 122
89. ata RainFlow The Rainflow flag indicates a rainflow stack overflow in a Rainflow DataMode channel The eDAQ lite shuts down the channel on which the overflow occurred and proceeds in an otherwise normal manner 169 I D SoMat eDAQ lite 170 10 3 2 RAMDiskFull The RAMDiskFull flag indicates that there is no more RAM Disk memory available for storing test data DataModes that require additional memory e g Time History or Peak Valley are suspended but histogram DataModes keep running normally Let the test run continue or stop the test as desired Note that attempting to start a new test run without sufficient RAM Disk memory to start causes the eDAQ lite to reboot itself SmartModuleError The SmartModuleError flag indicates that there is an error in eDAQ lite communications to a SMART module or there is an error in the SMART module factory or user data parameters The eDAQ lite also sets this flag when detecting an unknown type of SMART module based on the serial number Error Flags The eDAQ lite error flags are set only when the eDAQ lite detects a serious error When such an error occurs the eDAQ lite automatically resets If a test run is in progress a new test run may start based on the user specified FCS Reset Options BadRequest The BadRequest error flag indicates that a serious error condition exits on the eDAQ lite unit most likely resulting from a hardware failure or a software deficiency It is unlikely
90. be achieved NOTE For quadrature decoder channels the eDAQ lite resets the internal counter value to zero before rezeroing Display Control Scope Select the Scope button to open a scope plot display for the input channel Note that the Scope Plot is similar to an analog oscilloscope except that the display is not updated until the eDAQ lite acquires all of the data samples and transferred them to the host computer which creates a delay in the data presentation For more information on the scope plot see Scope Plot on page 72 DVM Select the DVM button to open a DVM display of the input channel In this display mode the transducer signals are repetitively sampled and displayed in a digital format For more information on the DVM display see DVM on page 71 Digital Input Channels Digital Input Add a digital input channel to any bit on an ELDIO layer The eDAQ lite uses standard switching logic to determine the boolean state of the channels For more information on ELDIO digital inputs see Digital Input Output on page 85 NOTE The last four bits 9 12 on each ELDIO bank are dedicated to wide range input channels Output Data Type The output data type for digital inputs is always 8 bit unsigned logical 12773 2 0 en x e z SoMat eDAQ lite 12773 2 0 en 17 OR 1 7 SN 7 Pd me z In N 6 2 2 Pulse Counter For the ELDIO the eDAQ lite a
91. ber of bins up to 500 for the histogram For the range mean and the to from histogram modes the value is for both histogram dimensions The total number of bins per dimension is the user specified number of bins plus two for underflow and overflow bins For the range mean and to from histogram modes which have two dimensions the total number of bins for the DataMode is the product of the total number of bins for each dimension Rainflow The Rainflow DataMode stores multiple channels of rainflow cycle histograms in the output data file The eDAQ lite acquires peaks and valleys from triggered or un triggered time history data streams using the user specified hysteresis value and the peak valley processing algorithm The resulting peak valley stream runs through the rainflow cycle counting algorithm to yield the set of closed cycles The closed cycles are histogrammed using the user defined options for the type and size of histogram For more information on the data processing algorithms used see Data Processing Algorithms on page 203 Input Channel The input channel data type must be 32 bit float or 16 bit integer If using the user defined bins option the input channel data type must be 32 bit float Histogram Mode Select one of three available histogramming modes 155 I D SoMat eDAQ lite 156 8 4 4 8 4 5 Mode Description Range Mean Accumulate cycle counts in bins with both a cycle range dimension and a
92. bit float slave all Rainflow 32 bit float 16 bit integer evenly divided bins only Time at Level 1D 32 bit float 16 bit integer evenly divided bins only Time at Level mD 32 bit float 16 bit integer evenly divided bins only Time History all 12773 2 0 en 177 x ey SoMat eDAQ lite 178 12773 2 0 en HBM SoMat eDAQ lite 12 Cable Pinouts 12773 2 0 en 12 1 12 1 1 ELCPU Main Processor Communications Cable The eDAQ lite is compatible with several different communications cables each of which provide a 26 pin D Sub connector for connection to the eDAQ lite Comm port The following table lists the communications cables and their connectors Ethernet Ethernet Communications Cable X O HUB Serial Sync 1 E ETHERNET X O 2 X 1 E ETHERNET HUB 2 X 1 SAC ESR9 XO 2 X 1 SAC ESR9 HUB 2 1 SAC ESYNCADAPT 2 1 SAC ESYNCADAPT SC 2 X x The 26 pin D Sub connector has dedicated pins for each type of available connector As shown in the diagram below pins 1 4 are for Ethernet communication pins 5 9 are for the networking sync connectors and pins 10 18 correspond to the serial 9 pin connector Sync Ethernet mr 18 17 16 15 14 13 12 11 10 26 25 24 23 22 21 Jb Serial Figure 12 1 Diagram of the 26 pin D Sub connector on the communications cables for connection to the eDAQ lite The following tables list the pinouts for each type of available connector and the cor
93. cable Keep cabling less than 30 meters in length to avoid transmission failures Plug in the VBM with the eDAQ lite power off When power is supplied the eDAQ lite recognizes the VBM during boot up Each VBM supports one type of vehicle bus hardware interface The available VBMs are e CAN e J1850 VPW e J1708 e _1S09141 KWP2000 Available Inputs Vehicle Bus Each vehicle bus module supports up to 254 channels The available channels depend on the vehicle bus type and the selected databases When the eDAQ lite receives vehicle bus message packets they are time stamped processed into individual data streams and re sampled as necessary to the user selected output rate For more information on setting up vehicle bus inputs see Bus Oriented Input Channels on page 108 Vehicle Bus Message A vehicle bus message channel acquires raw vehicle bus packets Every packet is time stamped upon receipt and can subsequently be stored in the specialized Message Logger DataMode For more information on setting up vehicle bus message inputs see Vehicle Bus Message Channel on page 110 89 SoMat eDAQ lite HBM 5 4 2 Configuration Options F NOTE ah a These configuration options also apply to the serial bus port H er N Hardware Interface Select the desired vehicle bus hardware interface Databases Select one or more database files from the presented list The selected databases determine the channel types availab
94. cally more erratic The min max display mode can only be used with one application at a given time If a second application e g InField attempts to run a min max display mode at the same time the data presented in TCE becomes invalid Contiguous Block Method e When the run time display starts TCE requests a contiguous block of data samples from the eDAQ lite for the selected channel The eDAQ lite responds to the request by returning the block of data samples TCE displays the data in the specified format and then requests a new block of data samples e Acontiguous block display adds to the eDAQ lite processing load and can lead to a DeviceOverFlow error reset for tests running at the edge of the eDAQ lite processing limit 70 4 5 2 Common Display Options Start Run run time only For run time displays during a preview run select Start Run to start a test run 12773 2 0 en T o SoMat eDAQ lite 12773 2 0 en 4 5 3 View Select one of the two view modes available for each display View Mode Description Scan Update data in the display as it is received Hold Do not update the display For some displays the Hold mode allows access to certain display options Setup run time only Select setup to exit the current display and return to the run time display setup window Units pre init and prerun only Select one of two units options available Units Description Signal Volts Display
95. ces menu provides a variety of options to modify some aspects of TCE including dialog window displays remote test run control configuration and TCE warning messages TCE saves the preference settings in a file named TceMS ini in the working subdirectory of the installation folder 45 I D SoMat eDAQ lite 46 3 2 1 3 2 2 Communications Connect Timeout Period Specify the desired timeout period in seconds for initiating communications with the eDAQ lite The default value of five seconds should work well for dedicated ethernet communications with an eDAQ lite that is not on a network hub Longer timeouts may be required for communications with an eDAQ lite on a busy or slow network hub or on a wireless ethernet connection NOTE The communications O timeout used for all PC to eDAQ lite communications equals the connect timeout period for periods greater than ten seconds Otherwise TCE sets the I O timeout period to the minimum timeout period of ten seconds Socket Buffer Size Specify the buffer size used for PC to eDAQ lite communications In general leave the default value of 61440 bytes for optimum communications data throughput For situations where timeouts on communications occur increasing the timeout period is recommended over decreasing the socket buffer size IP Address or Host Name Specify the IP address or host name of the desired eDAQ lite General Descriptions not IDs for data file plot
96. cessary to investigate this limit on a case by case basis Most active query requests are for packets that contain more that one bus channel If the active query rate is equal for a set of channels with the same request value the eDAQ lite ensures that the request is generated at the specified rate If different query rates are specified for the channels in the set the eDAQ lite sets the actual query rate as the maximum of the specified query rates NOTE Use the active querying master control setting in the hardware configuration dialog to disable or limit active querying NOTE There is a limit to the amount of active querying which is a function of multiple parameters including the type of bus and the amount of data broadcast on the bus It is recommended to investigate this limit on a case by case basis 109 I SoMat eDAQ lite 110 6 6 2 Stale Data Expiration Set the data expiration time period in seconds If the specified time elapses before the receipt of a data update on the input channel the eDAQ lite flags the data as invalid NOTE If the expiration time period is less than the sample rate period the eDAQ lite overrides the value and sets it such that the data will not expire in one sample period or less Invalid Data Output Value Set the value to substitute for any data flagged as invalid If the data type is 32 bit float the substitution value can be any floating point value otherwise the substitution value
97. cks gt minutes Deviation of Shunt Issue a warning if the measured shunt calibration span in volts Calibration Volts from deviates from the ideal shunt calibration by at least the specified Ideal gt percentage Warn user about unused channels Select one of three options of when TCE should issue a warning about unused channels 12773 2 0 en 47 I D SoMat eDAQ lite 48 3 2 3 Option Description If channel is not used Issue a warning when any defined channel is not either used a in a DataMode or computed channel or stored in a DataMode computed channel If channel is not used Issue a warning when any defined channel is not stored in a in a DataMode DataMode Do not issue Never issue a warning warnings Analog output file format options Not applicable to the eDAQ lite FCS Specific Default pipe frame rate Select the default pipe frame rate from the provided list The first number of each entry is the rate for an MSR of 100000 Hz and the second number is the rate for an MSR of 98304 Hz As data samples are collected from the transducer channels the eDAQ lite places them in blocks of data data frames and routes pipes them into computed channels and DataModes In the flow of data from the transducer inputs through the DataModes the data frames are referred to as pipe frames The lowest pipe frame rate is considerably more efficient from a processing point of view when there are a large numbe
98. computed channel Use a Down Sampler computed channel to achieve the desired data storage rate 12773 2 0 en 93 x ey SoMat eDAQ lite 94 12773 2 0 en HBM SoMat eDAQ lite 6 Input Channels 12773 2 0 en 6 1 6 1 1 This chapter details all of the available input channels and their parameters To acquire data during a test define input channels for each input signal in the transducer setup window Input channels can be transducer channels message channels or data channels derived from various message oriented data sources Each channel definition contains some common information such as the ID tag the hardware connector ID output data type desired full scale range and output sample rate In addition each channel type has specific parameters that must be defined Common Input Channel Parameters Desired Measurement ID Specify a unique identifier for the channel The name must conform to ID naming conventions Valid ID names e are case sensitive e are limited to a maximum of 12 characters e contain only valid characters i e letters a z A Z digits 0 9 and the underscore _ character e start with a letter e are not duplicates of system reserved names sin cos log etc Connector Hardware connector IDs identify connector assignments for transducers The default ID consists of the eDAQ lite IP address or host name layer identifier and the physical logical channel as specified in the hardwa
99. ct the triggered reset option to enable triggered resets of the tracker NOTE L a Resetting the tracker sets the range value to zero Trigger Channel If using the reset enable feature specify the desired trigger channel Trigger Mode If using the reset enable feature specify one of three available trigger reset modes Trigger Mode Description When TRUE Reset when the trigger channel is TRUE On FALSE TRUE edge Reset when the trigger transitions from FALSE to TRUE On TRUE FALSE edge Reset on the sample after the trigger channel transitions from TRUE to FALSE 7 5 4 Anomaly Detect The Anomaly Detect channel generates an output marking possible anomalies in transducer or computed channel data flow The eDAQ lite continuously tracks the selected parameters in the analysis window of a user defined size and outputs a status byte for each window Each bit in the status byte corresponds to a particular anomaly detection routine Use with a Bitmap Trigger computed channel to generate triggers based on the anomaly detection For more information on the Bitmap Trigger computed channel see Bitmap Trigger on page 135 Bit Routine Description Bit 1 Flat line Determine if the data is nearly constant over a user defined time period Bit 2 Drift Determine if the data mean drifts from the start of the test run Bit 3 Limit Determine if the data exceeds user defined maximum or minimum limits Bit 4 Kurtosi
100. cted the ability to upload individual test runs is disabled Use default sample rate filter for all low level calibrations Not applicable to the eDAQ lite Shunt calibration mode options Not applicable to the eDAQ lite Remote Test Run Control The remote control setup preferences configure the eDAQ lite for remote control of test runs using digital input and output lines The eDAQ lite uses the digital input and output lines on the lowest addressed ELDIO layer for remote control operation After selecting Remote Test Run Control from the Preferences menu choose the eDAQ lite option to modify the following preferences For more information remote test control see Using Remote Control Operation on page 80 NOTE Changing these preferences after a test is initialized does not affect the remote control operation for the test currently in progress Modify current test setup settings only Change the remote control parameters in the current test setup only When this option is disabled all parameters are saved as TCE defaults TCE applies the default settings to all new setup files and files without defined remote control parameters Previously defined parameters retain their values taking precedence over the application defaults Control mode Select the desired remote control mode Option Description Disable Do not use remote control Enable Use remote control for all subsequent tests Query Choose whether to use remote
101. d in the web interface DRAM Memory The amount of DRAM memory available for data storage is dependent on the size of the socketed DRAM The DRAM storage media option is applicable for limited testing scenarios only While it provides the maximum throughput compared to all other storage modes the DRAM memory is volatile This means that the test data is lost if the eDAQ lite powers down or resets for any reason such as a power failure or error reset In these cases when the eDAQ lite sets the PCMAccessError flag and begins re initialization use the Format RAM Disk menu option to restore normal operation CAUTION DRAM memory is volatile All test data is lost if the eDAQ lite powers down or resets for any reason Internal CompactFlash The eDAQ lite can use a disk partition on the internal CompactFlash for data storage The size of the internal Flash partition available for data storage is dependent on the size of the internal Flash card Note that about 32 MB of the internal Flash memory is reserved for the eDAQ lite Linux OS 12773 2 0 en T o SoMat eDAQ lite 12773 2 0 en TERM 2 5 2 5 1 eDAQ1 Networking eDAQ lite eDAQ Systems Networking allows multiple eDAQ lite eDAQ units to acquire data synchronously using a single master sample rate MSR clock source The networked system can consist of any combination of eDAQ and eDAQ lite systems For more information on data synchronization in a network of systems see
102. d the remote control and then stop the test This should be done with the run control switch on the master set in the off position so each slave increments the test run number and creates a new set of DataMode channels in the SIF file Suspend and resume the remote control mode using the same TCE interface as a stand alone eDAQ lite NOTE When the master eDAQ lite eDAQ reboots after a power failure or an error reset the system suspends the remote control mode to prevent starting a new test run on the master In this scenario stop all slave eDAQ lite eDAQ systems with test runs still in progress and resume remote control on the master so that all nodes start the next test run in sync It is advised to experiment with using remote control for an eDAQ lite eDAQ network and become thoroughly familiar with the details involved prior to using it in the field 12773 2 0 en HBM SoMat eDAQ lite 5 eDAQ lite Hardware 12773 2 0 en Ny ne AN 5 1 1 5 1 2 The following chapter provides details on the input and output channels and configuration options available on each eDAQ lite layer and module Access the configuration options through the TCE hardware setup window by double clicking a hardware entry or highlighting an entry and selecting Config NOTE For information on data synchronization across channels and hardware see Data Synchronization on page 191 ELCPU Base Processor The ELCPU is the foundation of the eDA
103. data storage option in use then the PC Card file system can become corrupted If this occurs or is suspected immediately attempt to transfer the test data to the PC using the tools in TCE If TCE reports corruption or any other anomalies contact HBM customer service For more details see Corrupt SIF File Data Recovery eDAQ lite Flags Status Flags The eDAQ lite status flags are set only when the eDAQ lite encounters an abnormal operating condition These flags do not result in a reboot of the eDAQ lite BadNVRAM The BadNVRAM flag indicates that the NVRAM flash memory contains invalid data The NVRAM memory area holds a number of eDAQ lite configuration parameters including the master sample rate preference and the eDAQ lite reset options When this occurs the eDAQ lite resets the NVRAM parameters to their default values BootError The BootError flag indicates that the eDAQ lite did not complete the boot process The eDAQ lite writes additional information to the log file when this occurs Please report this error to HBM customer service CharChecksum This CharChecksum flag indicates that the checksum stored with eDAQ lite layer characterization data does not match the checksum computed for the characterization data structure Data acquired using an invalid characterization data structure is not valid data Calibration The Calibration flag indicates that a transducer calibration or rezero was not completed in the expected manner T
104. dent in the data file stored in the eDAQ lite to a user specified PC disk file Upload complete SIE or SIF files after stopping a test run When using SIE data partial files are available for upload during a test run After transferring the file to the support PC use InField or other data analysis software to view and analyze the test data 77 I SoMat eDAQ lite 78 4 6 1 4 6 2 Uploading SIE Data Files From the eDAQ lite To upload SIE data from the RAM disk or PC Card storage in the eDAQ lite select Upload Test Data from the Test Control menu or toolbar Upload SIE test data at any time including during a test run when partial test data is available Use some caution when uploading during a test run as the upload task consumes some processing time and can result in a DeviceOverFlow error reset if the eDAQ lite cannot keep up with the processing requirements Uploading SIF Data Files From the eDAQ lite To upload SIF data from the RAM disk or PC Card storage in the eDAQ lite select Upload Test Data from the Test Control menu or toolbar If using RAM disk storage TCE uploads the SIF file directly to the PC file If the PC Card data storage option is in use the eDAQ lite first consolidates the SIF data file from the RAM disk resident component file and the set of PC Card resident component files A test run cannot be in progress to upload a SIF data file Upload SIF data after a test run or after ending a test The u
105. der of 100 Hz Wireless Network Synchronization For wireless eDAQ lite eDAQ networking using a GPS timing signal test results for the accuracy of the synchronization show that data can be synchronized to 0 1 milliseconds or better assuming all systems maintain consistent GPS lock If an eDAQ lite eDAQ loses GPS lock for only a short period of time i e 10 minutes or less then the synchronization is still maintained to within 1 0 milliseconds or better as long as there are no sudden or significant temperature changes in the eDAQ lite eDAQ GPS hardware 12773 2 0 en HBM SoMat eDAQ lite 15 Digital Filtering 12773 2 0 en 15 1 15 2 The following sections provide information on the user configurable digital filtering available for ELHLS and ELBRG channels For information on the analog filtering for each layer refer to layer data sheet Signal Aliasing In the process of converting analog input signals to digital data representations signal aliasing can occur if the digital sample rate is too low compared to the frequency content of the analog signal This is often referred to as under sampling the analog signal This section discusses how the eDAQ lite handles aliasing The eDAQ lite has analog guard filters that work in combination with user selectable digital filters to provide low pass filters that limit the frequency content of the digitized signal Furthermore if an anti aliasing filter is selected this filtering gua
106. display and parallel transducer calibrations require that the channel set reside on a individual network node However most non interactive features e g group edits and group deletions are supported across network nodes With the test setup definition completed and all transducer channels calibrated initialize and run the test in the same manner as for a single eDAQ lite test TCE coordinates all interaction between network nodes during initializations and test runs NOTE Run time displays can only display channels from one eDAQ lite eDAQ at a time While largely transparent the details of starting or previewing and stopping test runs are discussed briefly below TCE first prepares each slave eDAQ lite eDAQ for a test run start or preview in a serial manner The slave then waits for the master to assert the MSR clock source for the test run to actually begin on the slave During this waiting period the green and yellow LEDs on the slave blink in unison at a fairly slow rate At the start of the test run or preview the master asserts the MSR clock source which starts all test runs or previews synchronously To stop a test run or preview TCE stops 81 I SoMat eDAQ lite 82 4 8 1 l fes ah the test run or preview on the master eDAQ lite eDAQ which results in the de assertion of the MSR clock source When this occurs each slave detects the loss of the MSR clock source and stops the test run or p
107. ditional mode options These modes are all based on an internally applied shunt resistor to simulate strain or load Channel Additional Modes ELBRG 50 kilohm span 100 kilohm span 200 kilohm span 500 kilohm span Strain SMART 50 kilohm span 100 kilohm span Module These options define the slope of the calibration line Enter the engineering units equivalent for the span The eDAQ lite internally applies the selected shunt resistor across one arm of the bridge and measures the preshunt and postshunt signal voltages 60 12773 2 0 en SoMat eDAQ lite I Notes on Shunt Span Modes e The eDAQ lite stores the precise values for each of the shunt resistors in nonvolatile memory on the hardware layer The eDAQ lite performs the necessary computations to compensate for each shunt resistor s deviation from the exact values presented in the above list e For ELBRG or Strain SMART Module channels use the Install Shunts option in the Test Control menu to install the shunt calibration resistors during a test run or preview Use the test run data to quickly verify that all applicable channels are nominally calibrated While this data can also be used to verify calibration accuracy in a strict sense this is a more complicated process that requires knowledge of actual excitation voltage and actual shunt resistor value There is no option to remove the shunt resistors but the eDAQ lite always removes shunt resistors when preparing for a
108. dotted quad format xxx xxx xxx xxx for IP address netmask and gateway 6 Click Reconfigure Network to save the changes to the eDAQ lite 7 Cycle the power on the eDAQ lite for changes to take effect The support PC must be configured to allow continued eDAQ lite communications as noted in step 2 above For more information on the eDAQ lite web interface see eDAQ lite Web Interface on page 159 Using a serial connection 1 Power down the eDAQ lite and connect the serial communications cable to a PC COM port gt 27 I D SoMat eDAQ lite 28 2 3 1 2 Open the HyperTerminal application in Windows and follow the setup entering a name for the connection and selecting the COM port In the Connect To property page use the Configure button to set up the communications protocols to a 115200 baud rate 8 data bits 1 stop bit no parity and no flow control In the Settings property page select the Auto Detect emulation mode 3 Cycle the power on the eDAQ lite 4 After some initial boot log messages a string starting with AT is displayed Press ENTER four times to activate the login prompt Login as setup with no password 5 The eDAQ lite presents four network parameters available for modification host name IP address subnet mask and gateway Each has a separate prompt with the current default value appearing in brackets after the description Enter the new value or press enter to accept the existing value
109. e Remote Control If a test is initialized indicates the status of the remote control mode as either disabled enabled or suspended Run If a test is initialized indicates the current run number or the next run number if no test is running Run or Preview Started Indicates that a test run or preview is in progress Run Time If a test run or preview is in progress indicates the elapsed time since the start of the run The elapsed time display rolls over after 1000 hours Post Run Tasks Indicates that a test run is stopped but the required post run tasks are not completed RAM Disk Files Origin Indicates the original TCE name of the current test setup file Setup Indicates the eDAQ lite reference name of the current test setup file Data Indicates the name of the current SIF data file Note that even when using only SIE data the eDAQ lite retains a very small RAM disk based SIF file for internal purposes RAM Disk Memory Total Indicates the total RAM disk memory on the eDAQ lite in bytes and percent total of A js Be SIF File Indicates the current size of the resident SIF data file Unused Indicates the unused memory available for data file storage PC Card Disk Memory Total Indicates the total memory on the PC Card in bytes and percent of total nn os SIE File Indicates the cumulative size of the SIE data files currently on the PC Card SIF File Indicates the cumulative
110. e 1 4 and 5 8 connectors as either inputs or outputs The input lines can be sampled individually to generate logical i e Boolean data streams for triggering or other logical operations Use the ELDIO bank configuration options to program the input threshold mode and limits for determining the Boolean state of the input channels Connect channels to the ELDIO using the numbered M8 connectors on the front panel of the layer The output lines are updated at a low rate based on the user defined pipe frame size and are designed to drive LED indicators remote switches etc Use the ELDIO configuration options to set the power output at either nominal five volts or nominal 12 volts For more information on setting up digital inputs and outputs see Digital Input on page 98 and Digital Output on page 157 For more information on wiring digital inputs and outputs on the ELDIO layer see ELDIO Digital I O Layer on page 185 Pulse Counter The pulse counter channels share the same input lines as the digital input output channels Two pulse counter channels are provided on each connector 1 4 5 8 and 9 12 Pulse counter channels can measure pulse width count pulses or used in pairs as quadrature encoder inputs typically used to track angular or linear position Connect pulse counter channels to the ELDIO using the numbered M8 connectors on the front panel For more information on setting up pulse counter inputs see Puls
111. e Trigger computed channel For more information on the Interactive Trigger computed channel see Interactive Trigger on page 132 NOTE The eDAQ lite maintains the trigger states through power fail or error reset test run restarts Stopping a Test Run Manually stop the current test run by selecting Stop Run from the Test Control menu or toolbar or use the Test Run Stopper computed channel to automatically stop a test run based on triggering conditions For SIF files certain post run tasks may be required before the test is actually stopped If the PCM storage option is in use the SIF post run tasks consist of ensuring that the SIF component files on the PC Card are completely flushed and closed There are no post run tasks for SIE data files 67 x u SoMat eDAQ lite Category 4 3 7 Ending a Test To end a test run select End Test from the Test Control menu or toolbar Ending a test prevents starting a new test run until after re initializing the eDAQ lite This option is available when a test is initialized and no test run is in progress Data files are still available for upload after ending a test 44 Monitoring Test Status Select Get Test Status from the Test Control menu or toolbar to display the state of the current test and eDAQ lite data storage The provided indicators are described below Indicator Description Test Run Status Test Initialized Indicates that a test is initialized on the eDAQ lit
112. e Counter on page 99 Vly NOTE N ah a Input bits i e channels used for pulse counters can simultaneously be used for yoa E 3 7 digital input channels 12773 2 0 en 85 SoMat eDAQ lite I Limits on ELDIO Input Voltages The four channels on connector 9 12 on each bank of the ELDIO are wide range inputs that can accept steady state voltages in the range of 45 volts These channels can also tolerate short duration spikes up to 100 volts as can be encountered using inductive pickup devices The eight channels on connectors 1 4 and 5 8 of the ELDIO are configurable as either inputs or outputs and can accept steady state voltages in the range of 0 2 to 45 volts These channels can also tolerate short duration spikes up to 100 volts In general it is advised that these channels be used only with positive voltage input sources Exceeding the input ranges described above can result in component damage requiring factory repair Layer damage caused by exceeding input voltage limits is not covered by HBM warranty 5 2 2 Configuration Options Click on the bank button in the configuration dialog for the specific parameters indicated with bank in parentheses available for the bank The ELDIO layer also has several configuration options for the Megadac interface indicated with Megadac in parentheses Vehicle Module Usage bank The vehicle bus module usage parameter displays what type of
113. e Frame Rate Select the eDAQ lite test engine pipe frame rate As data samples are collected from the transducer channels the eDAQ lite places them in blocks of data i e data frames and routes i e pipes them into computed channels and DataModes In the flow of data from the transducer inputs through the DataModes the data frames are referred to as pipe frames The lowest pipe frame rate is considerably more efficient from a processing point of view when there are a large number of channels defined at lower sample rates lt 500 Hz Using the lowest pipe frame rate also modestly improves throughput performance for most tests with sample rates below 10000 Hz At sample rates above 10000 Hz a higher pipe frame rate generally results in the best throughput performance Because TCE run time displays run at the pipe frame rate higher pipe frame rates may be desired NOTE Select the default preference for the pipe frame rate using the FCS Specific preferences in TCE Enable Analog Output Inverting Not applicable to the eDAQ lite Input Output Configuration Not applicable to the eDAQ lite PC Card Options The PC Card options section contains four button controls for performing various tasks for the selected PC Card media PC Card Option Description Status Display a short message detailing the eDAQ lite SIF component file directory status of the installed PC Card Purge Purge the installed PC Card of all files Note t
114. e and the support PC Use TCE to e Create test setup files that define transducer channels computed channels and DataModes for online data analysis e Perform and manage calibrations for input transducers e Initialize run and end tests on a single eDAQ lite or a network of eDAQs e View real time test data with integrated run time displays e Monitor eDAQ lite memory status during data acquisition e Transfer test data from the eDAQ lite to the support PC for analysis e Configure the option to remotely control test runs This chapter describes the TCE user interface and preferences For details on using TCE to perform the listed tasks and more see Using TCE on page 55 TCE User Interface The following sections describe the TCE user interface including the setup windows pull down menus toolbar and status bar Setup Windows Create and modify TCE files using the five setup windows Access any of the button options in the windows using the mouse or the keyboard entry indicated by the underlined character For example select the Add button by either clicking on it or pressing A on the keyboard Select multiple entries using the standard CTRL and SHIFT keystrokes WE TCE v3 11 0 build 2277 Jog Fle Tet Conseil FCSSenp Prelererces Von W Heb olsa wwr e HH 1 DeB Se 12 N O 3S F1 F2 F3 F4 Cj 2 1 212125161216 L H id a 4 ba Data Mode Setup Node ID Data Mode Rate Che Data Made Speotios
115. e check calibration option performs a calibration run and displays a graph and numeric data comparing the original calibration with the one just performed For one channel the calibration check window shows the maximum deviation and the defined and measured calibration values For two or more channels the summary window shows each channel s maximum deviation in both engineering units and percentage of full scale range Click the More Info button to show the calibration check window for the highlighted channel NOTE The calibration check does not account for zero adjustments done after the original calibrations Zero Adjust Calibration The zero adjust calibration allows adjustments for small differences between the original zero setting used in calibration and the zero setting required for actual measurement This is useful to compensate for zero drift common with many input channels First enter the engineering value equivalent to the current input channel states Next the eDAQ lite measures the current input channel outputs and offsets the calibration lines as required to yield the specified engineering value Performing a zero adjust calibration adds a tilde to the end of the transducer s calibration date NOTE Use the zero adjust option only when necessary and then only for very small adjustments Because the zero setting is permanently modified consider recalibrating the channel instead of using this option NOTE For quadrat
116. e display or the last reset The FS min and max columns display the full scale values defined for the channel The bar chart is available as a run time display only For more information on bar chart display preferences see Run Time Display on page 52 12773 2 0 en 75 I SoMat eDAQ lite 76 4 5 8 Run Time Display for FCS Test 192 168 0 16 x View z Set t Start Run Scan Hold seu au Help A Reset pea Channel ID FSMin FSMax Units biti 0 00000 il 00000 logic fb it2 0 00000 77777777727 2727777772 1 00000 logic bt DO 1 00000 logic bts 000000 ZZZZZZZZZZZZZZZZZZA 1 00000 logic bis DO gt 777777777777 ZZ ZZ mpbpe_2 0 npepe 0 1000000 Hz flolew_2 100 000 100 000 Ig s fiolev_1 2500 0 2500 0 microstrain fhiev_1 10000 0 10000 0 millivolts piv 0 0 321 280 faltv_upt 00 0 0 321 28V rilev_1 _up10 10000 0 10000 0 milivolts 1 00000 logic 1000000 Rz Figure 4 7 A TCE bar chart run time display Reset Click the Reset button or use the ALT R keyboard shortcut to reset the tracking and display of the overall minimum and maximum values Strip Chart The strip chart display shows the minimum and maximum readings for up to four channels as a sequence of solid vertical bars along the x axis The chart displays up to 400 most recent min max readings The strip chart is available as a run time display only For more information on strip cha
117. e equivalent to the specified engineering units value The eDAQ lite measures the signal value External Span Define the slope of the calibration line When prompted during the actual calibration run apply two transducer signals that differ by the specified engineering units value The eDAQ lite measures the two signal values and computes the slope of the calibration line in engineering units per signal units Defined Value Define a single point on the calibration line Enter both the transducer signal value and the engineering units equivalent Defined Span Define the slope of the calibration line Enter both the transducer signal value span and the engineering units equivalent of the span NOTE l 7 ah a For ELHLS and ELBRG input channel types TCE supports the option to perform pA j a parallel calibrations if the calibration is defined with either two external values or one external value and one defined span If multiple channels have this calibration definition TCE asks if the calibrations should be performed in parallel or serially Example Calibration Suppose an inductive pickup is used on a flywheel with 180 pickups To output RPM calibrate the channel with the following definitions e Defined Value Eng Units 0 RPM Sig Units 0 Hz e Defined Span Eng Units 60 RPM Sig Units 180 Hz Shunt Span Modes Low level signal conditioner transducers ELBRG and Strain SMART Module offer ad
118. e input channel For example if the input channel sample rate is 2000 Hz a factor of 100 results in an output sample rate of 20 Hz Cal Scale Factor Specify the desired scale factor for converting measured pulse frequency in Hz to the desired engineering units 12773 2 0 en x e z SoMat eDAQ lite 12773 2 0 en Ky l k N IS D 7 2 6 ZN Minimum Frequency Limit Specify the desired minimum frequency limit for the Pulse Counter If there is no new pulse within the period 1 7 the channel outputs this frequency value NOTE The minimum frequency limit parameter provides a solution when a pulse train stops For example if a 50 Hz pulse train stops the Pulse Counter output remains at 50 Hz until there is a new pulse frequency Directional Velocity The Directional Velocity channel generates a signed velocity output from two input channels One input channel is the unsigned velocity the second input channel is a position channel and sets the sign of the output channel The sign of the output channel is determined from the position channel as follows If the position on the current data sample is greater than the position on the previous data sample the sign is positive If the position on the current data sample is less than the position on the previous data sample the sign is negative If the position on the current data sample is equal to the position on the previous data sample the sign
119. e its communications and network configuration select Add in the test ID network node window For a single eDAQ lite test add one network node For a set of networked eDAQ lite eDAQ systems add a network node for each eDAQ lite eDAQ in the test NOTE If using only a single eDAQ lite this step is optional A hardware query updates all required fields in the network node setup according to the current communications preferences IP Address or Host Name Specify the IP address or host name of the desired eDAQ lite Connect Timeout Period Specify the desired timeout period in seconds for initiating communications with the eDAQ lite The default value of five seconds should work well for dedicated ethernet communications with an eDAQ lite that is not on a network hub Longer timeouts may be required for communications with an eDAQ lite on a busy or slow network hub or on a wireless ethernet connection NOTE The communications I O timeout used for all PC to eDAQ lite communications equals the connect timeout period for periods greater than ten seconds Otherwise TCE sets the I O timeout period to the minimum timeout period of ten seconds 55 I SoMat eDAQ lite 56 Socket Buffer Size Specify the buffer size used for PC to eDAQ lite communications In general leave the default value of 61440 bytes for optimum communications data throughput For situations where timeouts on communications occur increasing the timeout period
120. e output channel data type is 8 bit unsigned logical Trigger Start Mode Select the start mode of the trigger from three available trigger start modes Trigger Start Mode Description When TRUE Start when the input channel is TRUE On FALSE TRUE edge Start when the input channel transitions from FALSE to TRUE On TRUE FALSE edge Start on the sample after the input channel transitions from TRUE to FALSE Enable Delay Select the enable delay option to enable the delay mode Delay Period When using the delay option specify the delay period in seconds after the input channel triggers to set the channel output The maximum value for the delay period is 4294967295 times the sample period Delay Conditional Mode Select one of three available delay modes to conditionally set the output channel state based on the behavior of the input channel during the delay period Delay Mode Description Unconditional Set the output to TRUE regardless of the input channel behavior during the delay period If TRUE at end Set the output to TRUE if the input channel is TRUE on the last sample of the delay period Otherwise the search for a new trigger start condition begins If TRUE continuously Set the output to TRUE if the input channel is continuously TRUE on all samples of the delay period If the input channel is FALSE at any point during the delay period the search for a new trigger start condition begins Enable Su
121. e the settings for group DVM displays 3 2 7 43 SoMat eDAQ lite HBM Menu Menu Option Description Section View Toolbar Show hide the TCE toolbar 3 1 3 Status Bar Show hide the TCE status bar 3 1 4 Test ID Network Setup Show hide the test ID network setup window 3 1 1 Hardware Setup Show hide the hardware setup window 31 1 Transducer Channels Setup Show hide the transducer channels setup window Fa D Computed Channels Setup Show hide the computed channels setup window 3 1 1 DataMode Setup Show hide the DataMode setup window 3 1 Window Cascade Cascade all open windows Tile Tile all open windows Arrange Icons Arrange all minimized windows at the bottom of TCE Close All Next Window Close all windows Activate next window Previous Window Activate previous window Toggle Maximized Maximize or restore active window 3 1 3 Toolbar The TCE toolbar provides quick access to commonly used TCE functions Each button also provides a guide to commonly used keyboard shortcuts Button Command El Initialize test CTRL 2 Button Command New setup CTRL N zO 44 Open setup CTRL O Start preview run CTRL P Save setup CTRL S Start test run CTRL 3 Open hardware setup window F1 View run time data CTRL 5 Open transducer channel setup window F2 Stop test run CTRL 6 ae RS 28 lee leu Open computed channel
122. ear Phase Filter The linear phase filter is designed using the well known Remez algorithm This filter provides a much sharper attenuation curve than the corresponding curve for the Butterworth filter Notice that a linear phase filter with a roll off start frequency of 1000 Hz at a 2500 samples per second sample rate is provided for compatibility with the similar low level layer sample rate and filter combination 12773 2 0 en u SoMat eDAQ lite 20 D 20 oO AD a 60 80 100 Solid Blue Theoretical Dashed Green 3 dB Dash Dot Red 96 dB ae 1 0 1 2 10 10 10 10 10 Frequency kHz Figure 15 4 Frequency response of a typical equiripple linear phase FIR filter The filter used for the frequency response is a 37 tap filter used twice to achieve 96 dB attenuation in the stop bands The response is calculated for a sample frequency of 10 Hz the roll off start frequency is 3 33 kHz and the noise floor begins at 6 667 kHz 12773 2 0 en 199 I D SoMat eDAQ lite 200 0 8 0 6 Sample 0 2 10 20 30 40 50 60 70 80 Sample Number Figure 15 5 Unit step response of a typical linear phase filter achieved by using a 37 tap equiripple FIR filter twice Notice that the unit step response of the filter has less overshoot than that of the Butterworth filter The response has a group delay of 37 samples but the eDAQ lite compensates for the delay so that the filtered data displays no phase sh
123. eck file option to parse the ASCII file and verify that the format is valid NOTE Because TCE parses the ASCII file at test initialization any changes to the file prior to initialization are effective for subsequent test runs Normalize Select the normalize tap coefficients option to normalize all tap coefficients for a unity gain Tracking Computed Channels Max Track The Max Track channel generates an output channel that tracks the maximum value of the input channel A logical channel specified as a trigger can reset the output channel tracking Input Channel The input channel data type must be 32 bit float or 16 bit integer Output Data Type The output data type is the same as the input data type Enable Triggered Reset Select the triggered reset option to enable triggered resets of the tracker NOTE Resetting the tracker sets the maximum value to the current sample value Trigger Channel If using the reset enable feature specify the desired trigger channel Trigger Mode If using the reset enable feature specify one of three available trigger reset modes 12773 2 0 en SoMat eDAQ lite HBM Trigger Mode Description When TRUE Reset when the trigger channel is TRUE On FALSE TRUE edge Reset when the trigger transitions from FALSE to TRUE On TRUE FALSE edge Reset on the sample after the trigger channel transitions from TRUE to FALSE 75 2 Min Track The Min Track channel generates an output
124. ected from aliasing indicates whether the current digital filter selection ensures no aliasing TCE automatically updates the field when the digital filter configuration changes For example the 100 kHz sample rate option precludes aliasing because it is well over the Nyquist frequency of two times the 25 kHz analog guard filter However the 50 kHz sample rate option does not fully preclude against aliasing because the guard filter only attenuates about 30 of the 25 kHz input signal content Excitation Range The excitation range setting determines the magnitude of the bipolar voltage applied to the red EXC and black EXC wires of the transducer cables Note that a range of Xvolts DC results in X72 to X2 pin out voltages Select one of the following discrete ranges 10 5 or O volts DC The maximum current which can be supplied is 51 milliamps at either 5 or 10 volts DC If signal excitation is required for the transducer which is always the case when using an actual bridge consult the transducer manufacturer s specifications and or suggestions for excitation settings If signal excitation is not required for a particular transducer leave the excitation in the default initial state and set the excitation proportional parameter to no Bridge Type Select the bridge type to match the transducer or select the differential amplifier option if the transducer does not use a bridge The available types are full bridge half bridge quarter brid
125. ed The offset value is the amount the transducer has been rezero offset since the test was first initialized For more information see Rezero Display on page 65 Power Micro Run Status Extract all of the power micro parameters to a PC file The eDAQ lite stores the power micro parameters just before each test run starts and includes information such as battery change level and battery temperature TCE also records the date and time of the start of each test run 79 I D SoMat eDAQ lite Message Channel Extraction Options The message channel extraction options provide the opportunity to extract message channel data sets that are resident in the SIE or SIF file to a text file on the support PC TCE presents a list box containing all of the message channels in the data file Select one or more of the message channels and then save the message channel data sets to a PC file Example PC Message Channel Files e ASCII Message Channel msg ascii simmsg asc RN 1 Sim Msg simmsg asc RX 10 0000000 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53 54 55 56 57 58 59 5A 41 42 43 44 45 46 47 48 49 AA AB 4C AD 4E 4F 50 51 andsoon RX 20 0000000 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53 54 55 56 57 58 59 5A 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 andsoon Binary Message Channel msg bin simmsg bin RN 1 Sim Msg simmsg bin RX 4 0000000 00 01 02 03 04 05 06 07 08 09 OA OB
126. efault configuration shown below ppp is the remote username and 123 is the password for that user Time Zone Setup Set the current time zone in which the eDAQ lite resides The current time zone local time and universal time UTC are provided 12773 2 0 en x SoMat eDAQ lite 12773 2 0 en 9 2 2 9 2 3 9 3 System Status The system status group of operations provides access to information about the current state of the eDAQ lite system Show Ethernet TCP IP Configuration Display information about the current configuration of the ethernet TCP IP communication system setup Show Running Processes Display a list of the currently running processes on the eDAQ lite System Maintenance Explore eDAQ Files Open the eDAQ lite file system to browse its contents The copy file option opens the interface for transferring a file from the PC to the eDAQ lite The current location within the file system is the default destination path in the copy interface Transfer a File to the eDAQ Open the interface to copy a file from the PC to the eDAQ lite Enter the path and file name of the file to copy and the destination path within the eDAQ lite file system Click Copy to eDAQ to copy the file Command Prompt Open the command prompt interface that allows direct entry of Linux shell commands to the eDAQ lite operating system This operation is for expert use only CAUTION Serious damage to the system can occur thro
127. egrator The Integrator channel generates an output channel that is the integral of the input channel As long as the integrator is not reset or suppressed each output channel sample is the cumulative sum of the current and all previous input channel samples multiplied by a user defined scale factor and added to a user defined initial value A logical channel set as a trigger can reset the integrator or suppress integration The integrator can also reset when exceeding a user defined summation value Input Channel The input channel data type must be 32 bit float 32 bit integer or 32 bit unsigned Output Data Type The output data type is the same as the input channel data type Integrate Only When TRUE Select the integrate only when TRUE option to suppress integration when the trigger channel is FALSE Enable Triggered Reset Select the enable triggered reset option to reset the integrator to the initial value when the trigger channel satisfies the defined condition Trigger Channel Specify the input channel used for the reset enable or sum on trigger options Reset Mode Select how to use the specified trigger channel for the reset enable option The available trigger condition options are below Reset Mode Description When TRUE Reset when the trigger channel is TRUE On FALSE TRUE edge Reset when the trigger transitions from FALSE to TRUE On TRUE FALSE edge Reset on the sample after the trigger channel transitions from
128. el is simply time CAUTION If the setup file has a Time History DataMode that uses any trigger channel and if an eDAQ lite error reset occurs while a test run is in progress some of the acquired Time History data will be lost The maximum amount of data that can be lost is the data frame size for the Time History input channels For example if the sample rate is 100 Hz and the pipe frame size is 2 5 Hz then the frame size is 40 data samples While this is not a big number it can represent significant data losses if using the one shot trigger mode to capture rare events Input Channel The input channels can be any data type 147 I D SoMat eDAQ lite 8 3 2 148 Data Type For 32 bit float input channels select one of three available formats for data storage and conversion Data Type Description 32 bit float No conversion is necessary Use the 32 bit float mode for computed channels where full scale estimates are uncertain or unknown 16 bit integer Maintain the resolution of both the 12 bit and 16 bit A D converters 8 bit integer Lose significant resolution in both the 12 bit and 16 bit A D converters Use the 8 bit integer mode only for a rough picture of channel behavior NOTE Using the integer data types requires that valid full scale minimum and maximum values are defined for each input channel selected for the DataMode Burst History The Burst History DataMode stores one or more bursts of data when
129. emote control outputs Scope and Spectrum Display The scope and spectrum display options allow changes in the color schemes and other presentation parameters for both run time displays and the original displays used when a test is not running For more information on scope and spectrum displays see Viewing Channel Displays on page 68 Trace color Select the desired color for drawing signal trace vectors 51 I D SoMat eDAQ lite 52 3 2 6 Vly SN j A SI 3 2 7 Screen color Select either black or white as the background screen color Auto scale mode Automatically scale the y axis As spectrum displays always use auto scale this option is only applicable to scope displays Show grid lines Activate visible grid lines on the plot Show prerun value Start the display showing the prerun value when present This option is only applicable to the scope displays Run Time Display Use the run time display preferences to set a default run time display type and configure display options for the bar and strip chart display For more information on run time displays see Viewing Channel Displays on page 68 Display mode Select the preferred display mode to use as the default when opening a run time display NOTE To modify the display parameters for scope and spectrum plots use the scope and spectrum display preferences The digital readout display has no display options Trace bar c
130. er of continuous cycles i e passes through the file to output After the outputting the specified number of cycles the eDAQ lite repeatedly outputs the last data value in the file Scale Set the value used to scale the data values as defined in the file on a point by point basis Offset Set the value used to offset the data values as defined in the file on a point by point basis Decay Set the value used to adjust the scale value on a pass by pass basis The scale factor is multiplied by the decay factor on each successive pass which results in an exponential decay of the signal if the decay factor is a positive fraction Note that the default value of one results in a consistent signal from pass to pass with no decay Drift Set the value used to adjust the offset value on a pass by pass basis The drift factor is added to the offset value on each successive pass Note that the default value of zero results in a consistent signal from pass to pass with no drift Simulation Message Output Data Type The output data type is always 8 bit unsigned message Format Select either an ASCII or binary message format The ASCII format pouts a repeating pattern of the 26 letters from A to Z The binary format outputs a repeating pattern of byte values from 0 to 255 Message Size Specify the message size in bytes Message Interval Specify the period in seconds for repetitive generation of the simulated message 113 x ey So
131. erences Use the auto range options to acquire the minimum and maximum values for all channels stored in Time History DataMode in the eDAQ lite resident SIE or SIF file This includes all transducer channels and all computed channels that have the full scale values defined The information is displayed on a run by run basis The initial dialog window presents the results from the last run Select to display other runs as desired The channels are sorted in the order of full scale saturation percent i e how close the channel is to either of the user defined full scale limits This option is available whenever the SIE or SIF data file is resident in the eDAQ lite There are also options provided to auto range the full scale definitions based on the minimum and maximum values reported for each channel for any given run To use this functionality highlight the desired channels in the list box complete the following control fields Range Multiplier Use the range multiplier to set some range padding on the auto range assignments If this parameter is set to 100 the full scale limits are set to the minimum and maximum values acquired for the test run The default value of 200 sets the full scale values so that the resulting full scale range is double the range of the acquired data The minimum value is 10 which might be used if the acquired data exceeds the original full scale limits If ensuing test runs are expected to be very consistent with
132. eriods and off FALSE periods The eDAQ lite ensures that there is at least one output sample for both the on period and the off period Use a Trigger Generator channel to create an elapsed time trigger for DataModes or other computed channels that support triggering For example the eDAQ lite can use a generated trigger channel to store 10 minutes of data every hour The Trigger Generator channel is ideally suited for long term acquisitions such as temperature measurements of civil structures NOTE The upper limit for all periods in seconds is 4 25E 09 divided by the sample rate Input Channel The input channel sets the sample rate of the channel All data types are supported Output Data Type The output channel data type is 8 bit unsigned logical Initial Delay Period Specify the initial delay period in seconds After the delay period the output switches to the on state If set to zero the output starts in the on state On Period Specify the on period in seconds The output switches to the off state after this period Off Period Specify the off period in seconds The output switches back to the on state after this period 12773 2 0 en x e z SoMat eDAQ lite 12773 2 0 en 7 3 3 Timed Trigger The Timed Trigger computed channel generates a logical output based on a logical input and user defined timing parameters Input Channel The input channel data type must be 8 bit unsigned logical Output Data Type Th
133. ermanent ground connection to the vehicle chassis Vehicle Main Power Battery SAC EPWR15 Power x eDAQ Remote Power V 5 red Vehicle firewall Figure 2 2 Vehicle battery connection for non switching battery to ground An alternate method shown below uses a vehicle electrical system or harness which may be a switching supply such as an ignition or a relay type device This method while feasible is not recommended and cannot be guaranteed as safe Results may include unwanted multiple runs of data improper reboots lost data due to multiple power cycles and improper charging of the internal battery pack 31 SoMat eDAQ lite I o V oo Vehicle Main Power Battery Bu SAC EPWR15 black 5 V m eDAQ Remote Power V red a Vehicle firewall Figure 2 3 Alternate vehicle battery connection for non switching battery to ground Negative Battery Terminal Switching For a system with a switched power system that removes the negative battery terminal from the equipment chassis ground carefully follow the illustrated recommendation below CAUTION Failure to follow these suggestions may result in blown fuses and or permanent damage to the eDAQ lite Improper powering of the unit requiring repairs by HBM technicians may be deemed as non warranty usage resulting in service charges V red Vehicle Main Power u Battery black SAC EPWR15 Power
134. es in the output data file Master Input Channels Select the desired set of master input channels using CTRL to select more than one channel The master input channels can be any data type Slave Input Channels Select the desired set of slave input channels using CTRL to select more than one channel The slave input channels can be any data type Data Type For 32 bit float input channels select one of three available formats for data storage and conversion Data Type Description 32 bit float No conversion is necessary Use the 32 bit float mode for computed channels where full scale estimates are uncertain or unknown 16 bit integer Maintain the resolution of both the 12 bit and 16 bit A D converters 8 bit integer Lose significant resolution in both the 12 bit and 16 bit A D converters Use the 8 bit integer mode only for a rough picture of channel behavior NOTE Using the integer data types requires that valid full scale minimum and maximum values are defined for each input channel selected for the DataMode Time Input Channel Optionally select a Time Channel computed channel from the provided list For more information on the Time Channel computed channel see Time Channel on page 136 Store Initial State Set the store initial state parameter to yes to always store the initial state at the start of each test run 151 I D SoMat eDAQ lite 8 3 4 8 3 5 l fes ah
135. esh the web interface as it may change with the new firmware Updating Layer Level Firmware To update layer level firmware 1 Open the eDAQ lite web interface to the hardware table and click on the Code column for the desired layer For more information on the eDAQ lite web interface see eDAQ lite Web Interface on page 159 2 Browse to the correct firmware file on the PC and click Update Wait for the application verified message indicating a successful update 3 If no other firmware updates are required cycle the power on the eDAQ lite to complete the overall firmware update process NOTE For more detailed procedures for each layer type and a listing of the current layer level firmware versions see the instructions for installing eDAQ lite firmware provided with the firmware installation 12773 2 0 en x e z SoMat eDAQ lite 12773 2 0 en 2 2 2 2 1 2 2 2 7 NSN NL Communications Communications Methods Ethernet Communications Data transfer rates of up to 4 MB per second are possible using the 100BASE T Ethernet connection for communications between the eDAQ lite and its support PC A 100BASE T compatible Ethernet card must be installed in the support PC Connect the eDAQ lite to its support PC directly using the provided crossover cable 1 E Ethernet X O 2 or through a network using the optional hub cable 1 E Ethernet HUB 2 Using a network removes proximity restrictions on the eDAQ lite and support
136. est data on the RAM disk or on the PC Card media DRAM or internal Flash as selected in the web interface For more information on data storage options see Data Storage Options on page 34 NOTE The eDAQ lite does not support storing SIE data on the RAM Disk Regardless of the data storage setting the eDAQ lite saves SIE data to the storage device selected in the web interface If the PC Card storage device is selected and there is no PC Card in the eDAQ lite the TCE cannot initialize the test Data Storage Option Description PC Card The eDAQ lite stores all data in a file on the PC Card file system media For SIF data collection other file components such as the header file and keywords are stored on the RAM disk For histogram DataModes the eDAQ lite maintains the histogram data in DRAM memory while the test is running and then copies the data to a file on the PC Card after test completion RAM disk SIF only The eDAQ lite builds the SIF data file in RAM disk memory For more information on data storage options see Data Storage Sequential DataModes Time History The Time History DataMode stores multiple channels of triggered or un triggered time history data streams in the output data file NOTE If using the trigger gate or one shot trigger conditions the x axis label in InField is collection time to distinguish from the time from the start of the test run If using the always on trigger condition the lab
137. etup file stored in the eDAQ lite to a user specified PC disk file USB Display Setup Set up the values to display on the optional USB LCD display Minimal Control Panel Open a test control panel with the ability to start and stop test runs and upload SIF data The panel also includes indicators for run number run time and PC Card memory Data Tab The Data tab provides access to view and save test data 163 I D SoMat eDAQ lite 164 9 6 1 9 6 2 9 7 System Hardware Channels Data ustom Ip SIE Test Data bout the SE file format Read about how to use SIE on the eDAQ Test Modified Size View Get Operate nd_bug_test_ 01 20 15 20 291269 2 B Tast Runs All Channe SE File Extract SE Channels Reitialize Dolot eDAQDLL Test 525 23 49 34 KiB Test Runs All Channels SE File Extract SE Channels Reiitialize Delete A_Trigger 201 27 16 439 11 KiB Test Runs All Channels SE File Extract SE Channels Reinisislize De IA_Tngger 2009 01 27 16 19 s2 a2342 KiB Test Runs All Channels SE File Extract SE Channels Reini A_Trigge 2009 01 27 29 60 KiB Test Runs All Channels SE File Extract SE Channels Rein Le A_Tr oger 2003 01 27 16 2443 33 61 KiB Test Runs All Channels se File Extract SE Channels Rewialize Delete LA _Tngger 2009 01 28 09 1214 7683 28 KiB Test Runs All Channels SE File Extract SE Channels Rewmalize Delete IE Fi Brows Py SIF Test Data SIE File Bts 7 s Cerpereten Fig
138. f time in seconds for data sampling after the trigger Pre Trigger Time Specify the desired period of time in seconds for data sampling before the trigger Number of Bursts Specify an upper limit on the number of bursts the eDAQ lite can store The DataMode effectively turns off after storing this number of bursts NOTE Using the max bursts mode option limits the number of bursts to 250 Max Bursts Mode Select enable max bursts mode to store the most significant burst records according to the following criteria After storing the user defined maximum number of burst records the eDAQ lite compares each new burst record to the least significant burst already stored If the new burst is more significant the eDAQ lite overwrites the least significant burst record with the new burst record retaining the most significant burst records The max bursts mode adds significant processing overhead NOTE The max bursts mode option is not available if using the PC Card data storage mode Max Bursts Reference Value Specify the reference value used in determining burst significance for the max bursts mode 149 SoMat eDAQ lite I D DRAM Buffering Selecting the DRAM buffering mode allocates the circular buffer used for burst data capture in DRAM memory Otherwise the eDAQ lite allocates the circular buffer directly on the Linux file system media DRAM buffering is only available when using the internal CompactFlash memory for data stor
139. fied from its original condition The following cables have been recently modified to be CE compliant All other cables are also CE compliant e SAC EPWR15 Power Cable 1 SAC EPWR15 2 e SAC EXT VBM Vehicle Bus Module Extension Cable 1 SAC EXT VBM 2 208 12773 2 0 en SoMat eDAQ lite x ey 12773 2 0 en 209 Germany Head Office HBM GmbH Im Tiefen See 45 64293 Darmstadt Tel 49 6151 8030 Email info hbm com USA Head Office HBM Inc 19 Bartlett Street Marlborough MA 01752 Tel 1 800 578 4260 Email info hbm com USA HBM Inc SoMat Products 702 West Killarney Street Urbana IL 61801 Tel 1 800 960 3273 Email info hbm com Web http www hbm com somat PR China HBM China 106 Heng Shan Road Suzhou 215009 Jiangsu Tel 86 512 682 47776 Email info hbm com HBM Inc All rights reserved All details describe our products in general form only They are not to be understood as express warranty and do not constitute any liability whatsoever measure and predict with confidence I S SoMat P N DOC 0005 01 12773 2 0 en
140. file before uninstalling the previous version of TCE 12773 2 0 en 1 3 2 Getting Familiar with the eDAQ lite System eDAQ lite Front Panel All of the connectors the power switch and the status LEDs needed to set up the eDAQ lite are on the ELCPU front panel as shown in the following diagram HSS Comm Power 26 Pin D Sub Status LEDs Power Switch 15 Pin D Sub Communications Power Connector Connector HSS Connector for eDISPLAY Figure 1 1 Diagram of the eDAQ lite front panel SoMat Communications Cables The eDAQ lite is compatible with several different communications cables Each cable has a 26 pin D Sub for connection to the eDAQ lite Comm port The cables may also have an Ethernet X O connector for direct communication from the eDAQ lite to the PC an Ethernet HUB connector for communication through an Ethernet hub a 9 pin serial connector for communications through a PC serial port or a set of two LEMO sync connectors for networking eDAQ lite eDAQ systems A summary of the available communication cables is below I D SoMat eDAQ lite 20 Ethernet Ethernet Communications Cable X0 HUB Serial Sync 1 E ETHERNET X O 2 X 1 E ETHERNET HUB 2 X 1 SAC ESR9 XO 2 X 1 SAC ESR9 HUB 2 1 SAC ESYNCADAPT 2 1 SAC ESYNCADAPT SC 2 X X 1 3 3 Setting Up the eDAQ lite To power the eDAQ lite and establish communications with its support PC 1 4 1 Connect the 26 pin D Sub connector of a S
141. formation bar provides access to categories of available operations Open the page for each category by clicking on the appropriate tab The subsequent sections of this chapter describe the available operations System Tab The System tab provides several tools for setting up maintaining and monitoring the eDAQ lite 159 I D SoMat eDAQ lite 160 9 2 1 MOAQ NoTestripabmes Ep 192 16305 2009 03 04 165123 gt System Hardware annels Test Data Custom Help System Setup 2A buti 244 Mt Corporation Figure 9 2 System tab of the eDAQ lite web interface System Setup The system setup group of pages provide methods to modify the network configuration parameters RS 232 communication parameters remote user name and password and the time zone in which the eDAQ lite resides Network Setup Use network setup parameters to modify the host name IP number netmask and gateway as required RS 232 Setup Set the serial communication parameters within the eDAQ lite by modifying file pgetty conf the file containing all configuration information for serial communication CAUTION Errors within pgetty conf can cause all serial communication to cease to function Use extreme caution when modifying this file Remote Username and Password Setup Set the usernames and passwords that are allowed remote access to the eDAQ lite through a dial up connection To make changes to this setup modify the file as needed In the d
142. g a test using the eDAQ lite as outlined below For more information on using TCE to complete these phases see Using TCE on page 55 Plan Test Before any test setup first develop a test plan including the test objective the physical quantities to be measured any signal manipulation or computations to perform during the test the desired data collection method and when and how often data should be recorded 12773 2 0 en I e z SoMat eDAQ lite 12773 2 0 en Prepare Hardware After planning the test install the various gages sensors and cables required for the test This includes attaching the transducers to the components being measured connecting the transducer cables to the transducer and connecting the transducer cables to the appropriate eDAQ lite connectors Define Test The eDAQ lite collects data from transducers and other input sources manipulates the signals using computed channels and stores the data in a variety of DataModes Use the TCE software that comes with the eDAQ lite to fully define the desired test Also during this phase verify that the transducers and data channels are operating as expected using TCE channel display options Run Test Running the test consists of several necessary steps including initializing the eDAQ lite starting the test run collecting the data stopping the test run and ending the test session After a test is initialized the eDAQ lite allows for multiple test runs dur
143. g from a hardware failure or a software deficiency It is unlikely that this error can result from an operator mistake RingBuflnvalid The RingBuflnvalid flag indicates that there is an interruption in the incoming data stream that would result in a missed data sample and the option for an error reset on this event is enabled The eDAQ lite uses this flag only for input data processed using the ring buffer interface scheme e g vehicle bus data TimeOut The TimeOut error flag indicates that a serious error condition exits on the eDAQ lite unit most likely resulting from a hardware failure or a software deficiency It is unlikely that this error can result from an operator mistake Corrupt SIF File Data Recovery NOTE This topic is applicable to the SIF data format only Data stored in the SIF format can be corrupted in the unlikely event of one or more power failures during a test run when there is insufficient charge in the backup battery 171 I D SoMat eDAQ lite 172 10 5 Understanding that these corruptions do happen HBM does attempt to evaluate and if possible recover SIF data file contents This is handled on a case by case basis and is subject to a service charge The SIF component file set i e all of the SIF SIC files must be sent intact There is very limited hope of recovering data from a consolidated corrupt SIF file alone If TCE reports that any test runs have ended abnormally or there is any o
144. ge and differential amplifier Output Proportional to Excitation Select the proportional excitation option if the output signal is linearly proportional to the applied excitation signal as it is for bridge type transducers When using this option the eDAQ lite makes a minor correction for the fact that the set excitation voltage cannot be exact Bridge Resistance For quarter bridge configurations the value defaults to the provided completion resistor If necessary modify the value if the actual strain gage has a slightly different resistance For either full or half bridge configurations select any resistance in the range of 100 to 10000 ohms 12773 2 0 en I SoMat eDAQ lite 12773 2 0 en Gage Factor Define the gage factor for the specific strain gages used TCE uses this value only in the shunt tool calibration option that defines an equivalent strain based on the gage factor and bridge factor values Bridge Factor Define the bridge factor for the specific configuration of strain gages used TCE uses this value only in the shunt tool calibration option that defines an equivalent strain based on the gage factor and bridge factor values The bridge factor is defined here as the arithmetic sum of the active bridge legs for any bridge configuration For quarter bridge applications the bridge factor is normally one for half bridge applications where both active gages are additive it is normally two and for full bridge appl
145. ge of the connection wiring assembly Power Fail Shutdown When a power fail shutdown initiates with a test run in progress the eDAQ lite immediately stops the test run and flushes all data in temporary buffers to the PC Card This can take several seconds It is imperative that the backup battery is sufficiently charged to keep the eDAQ lite running during this time If this is not the case data stored in the SIF format becomes corrupted Battery Power A fully charged eDAQ lite backup battery has at least 100 watt minutes of reserve power It takes about four hours to fully recharge a completely discharged backup battery The battery charging circuit draws four watts maximum while charging The backup battery charger operates on an as needed basis An intelligent charge controller monitors current into and out of the backup battery tracking the current charge state of the battery When the battery has discharged to about 92 of rated 29 I D SoMat eDAQ lite 2 3 3 ty SX 1 SJ gt capacity and the eDAQ lite is connected to a power supply at more than ten volts the charger turns on and runs until fully charged normally a process of about 20 to 30 minutes An eDAQ lite that is turned off and connected to a power supply such as a vehicle battery runs one of these 20 minute charge cycles about once every two days or an average power drain of about 30 milliwatts i e 2 5 milliamps at 12 volts When a
146. gging messages viewing status and resetting the vehicle bus hardware Navigate to the Help tab for more detailed information on vehicle bus options Serial Number The serial number column indicates the unique serial number of the layer in the stack Code The code column displays the version of the code i e firmware that controls the layer To update the code from the web interface click the hyperlink For layers that place more than one entry in the hardware list only one of the entries allows an update to the firmware For more information on updating firmware see Updating Firmware on page 26 CAUTION Failures during a critical point in any upgrade reflash can cause the hardware to malfunction requiring its return to HBM for repair by a qualified HBM technician 12773 2 0 en x e z SoMat eDAQ lite 12773 2 0 en 9 3 2 9 4 9 5 9 6 Hardware Specifics The hardware specifics column includes other pertinent details about the layer such as applicable ECNs the selected storage media or GPS model An ECN is an engineering change notice signifying a physical modification made to the hardware of a layer to correct or improve its performance These changes are recorded in non volatile memory within the layer Click the link to view the ECN number and the date of the change Use the storage link in the MPB row to view details or reformat the PC Card media Select Storage Device Use the pick list to select in
147. hat purged files cannot be recovered Test This function is no longer supported on the eDAQ lite Format Open the eDAQ lite web interface to format the installed PC Card ELDIO Digital Input Output Layer The ELDIO is an extremely versatile layer that supports digital inputs and outputs pulse counters two vehicle bus module interfaces and optional GPS receiver DIO 1 4 5 8 9 12 GPS Sync Sync Figure 5 2 Diagram of the M8 connectors on an ELDIO layer 12773 2 0 en SoMat eDAQ lite T o S 5 2 1 Available Inputs and Outputs The digital I O channels are grouped into one bank A The bank contains three connectors of four digital I O channels i e bits The eight channels on connectors 1 4 and 4 8 are individually configurable to be either inputs or outputs The four channels on connector 9 12 are dedicated wide range input channels Each connector also provides two pulse counter channels for a total of six pulse counter channels per bank One layer also supports up to two independent vehicle bus module interfaces and an optional GPS receiver which appear as separate entries in the TCE hardware setup window For more information on the GPS module see EGPS 5HZ SoMat GPS Receiver on page 88 For more information on setting up vehicle bus modules see Vehicle Bus Module on page 89 Digital Input Output There are 12 digital input output lines available for the ELDIO Use TCE to configure the lines on th
148. he TCE communications preferences 12773 2 0 en SoMat eDAQ lite HBM Menu Menu Option Description Section File New Setup CTRL N Create a new setup file 4 1 Open Setup CTRL O Open an existing setup file 4 1 4 Save Setup CTRL S Save the currently open setup file Save Setup As Save the current setup file with a new name and or location Save Setup Listing Generate a readable listing file containing current setup information 12773 2 0 en Save Setup Tab Delimited Generate a tab delimited text file of current hardware setup Provided primarily for HBM internal use Open SIE or SIF File Extract keyword and message channel data from an existing SIE or 4 6 3 SIF file Consolidate SIC Files Generate a complete SIF file from a set of SIF component files SIC files Call Infield EASE DataXplorer CTRL D Start InField EASE or DataXplorer for displaying and or analyzing test data Exit Quit TCE Recent Files View a list of the five most recently opened TCE files 41 SoMat eDAQ lite HBM Menu Menu Option Description Section Test Control Control Panel CTRL 0 Open the TCE control panel 4 3 Get Test Status CTRL 1 Check the current test status of the eDAQ lite 4 4 Initialize Test CTRL 2 Initialize the eDAQ lite in preparation for the test run 4 3 1 Remote Control CTRL R Suspend or resume remote control operation 4 7 Preview Run Start a te
149. he problem see Tips on Eliminating eDAQ lite OverFlow Errors 12773 2 0 en I e z SoMat eDAQ lite 12773 2 0 en 10 4 NET T TH Missedinterrupt The Missedinterrupt flag indicates that the eDAQ lite unit is interrupt bound i e it cannot service data acquisition interrupts fast enough The only recourse is to reduce the sample rate for the transducers that generated the missed interrupt ParityError The ParityError flag indicates that there is a unrecoverable inconsistency in a RAM Disk pointer structure The RAM Disk pointers are stored in triple redundant fields If none of the three pointers are consistent the eDAQ lite sets the error flag and resets itself It is unlikely that this error can result from an operator mistake QueueOverFlow The QueueOverFlow flag indicates that the defined test exceeds the eDAQ lite units processing capabilities This may occur when many channels are taking data at very high sample rates or large numbers of computed channels are defined For a thorough discussion of this problem see Tips on Eliminating eDAQ lite OverFlow Errors RAMDiskCorrupt The RAMDiskCorrupt flag indicates a corruption of the RAM Disk memory Transfer any existing test data files to the PC and reformat the RAM Disk Consider the test data file suspect RingBuflnterface The RingBuflnterface error flag indicates that a serious error condition exits on the eDAQ lite unit most likely resultin
150. he two main reasons for this status flag are faulty hardware and unexpected signal values such as the voltage exceeding the defined safe limits after rezeroing The eDAQ lite generates Calibration errors only on the channels that have programmable gain and offset capabilities e g ELHLS and ELBRG channels eDAQReset The eDAQReset flag indicates any eDAQ lite reboot As such it is simply an informative message only 12773 2 0 en x e z SoMat eDAQ lite 12773 2 0 en MathException The MathException flag indicates a floating point math exception such as taking the square root of a negative number in a Desk Calculator computed channel While not a fatal error in itself it does indicate a situation that is most likely undesirable ParityStatus The ParityStatus flag indicates that there is a recoverable inconsistency in a RAM Disk pointer structure The RAM Disk pointers are stored in triple redundant fields If only one of the three pointers is inconsistent the eDAQ lite changes it to match the other two and sets this flag If none of the three pointers are consistent the eDAQ lite sets the ParityError flag and resets itself PCMAccessError The PCMAccessError flag indicates that the eDAQ lite cannot access the PC Card during the start of test initialization the start of a test run or the restart of a test run after a power failure or an error reset It is likely that the PC Card has been removed If this is the case re inse
151. hermocouple as T J K or E If the channel is calibrated delete the calibration before selecting a different thermocouple type Hardware Configuration Click the hardware button to view the SMART module user data parameters as they are defined in the hardware setup configuration Note that TCE does not update reprogrammed SMART modules until a hardware query is performed Temperature Input Channels Thermocouple Add a thermocouple input channel to any ELNTB connector For more information on the ELNTB layer see ELNTB Non Isolated Thermocouple Layer on page 92 Output Data Type The output data type is always 32 bit float Thermocouple Type Select the type of thermocouple as T J K E or thermocouple undefined Replace Lost Data Samples Set this field to yes to fill the data samples with a fixed value of 1 0e 06 when the input voltage to an input channel is out of the thermocouple s operating range The most common cause for this is a broken thermocouple or not having a thermocouple plugged into the front panel input connector NOTE Both lost data samples and out of range data samples are flagged as invalid in the test run pipe frames i e the frames of data that are passed to the computed channel and DataMode modules This allows the Valid Data Gate computed channel to keep track of all invalid data samples For more information on the Valid Data Gate computed channel see Valid Data Gate on page 143 Bus Orien
152. hunt calibration or gage and bridge factors For a shunt calibration based on a known shunt enter the shunt resistor and corresponding engineering value e g a 33 2 kilohm shunt that produces a 2200 pound output TCE initially highlights the shunt resistor that results in the closest engineering value Select the desired calibration step definition based on the strain values expected in the field The equivalent engineering values for the shunt resistors use the following equation 7 Ro 2Rsk Ve Ve HR 2R 12773 2 0 en 61 I D SoMat eDAQ lite 62 4 2 2 where Vis the equivalent engineering units value Vis the known engineering units value A is the nominal gage resistance A is the known shunt resistance and Ase is the equivalent shunt resistance NOTE Be careful to ensure that the known shunt calibration applies to the same leg of the bridge circuit that used in the shunt calibration otherwise the polarity of the computed shunt span may be inverted A shunt calibration based on the gage and bridge factors calculates a shunt resister using the gage factor of the active strain gage and bridge factor for the bridge configuration defined with the channel parameters Select the desired calibration step definition based on the strain values expected in the field The shunt tool assumes that the engineering units are microstrain If using dimensionless strain units divide the equivalent strain value by 1000000
153. ications where all active gages are additive it is normally four Because there are special applications where the bridge factor can be a fraction and or a negative value TCE considers any nonzero value valid Leadwire Resistance Correction Select the leadwire resistance correction option to compensate for leadwire resistance effects when using the defined span or external span calibration modes NOTE The eDAQ lite always performs leadwire resistance correction for shunt calibrations Leadwire Resistance Specify the value of the leadwire resistance when using the leadwire resistance correction option The resistance input is the resistance of one lead ideally measured from the ELBRG layer connector pin to the connection at the active bridge leg It is presumed that all lead wires are approximately the same length Quarter bridge applications require the use of all three wires To accurately measure the leadwire resistance use the four wire resistance measurement method Nominal resistance values for transducer cable wires can help to estimate the leadwire resistance see Cable Resistances on page 205 However since contact resistances at mechanical connections are difficult to estimate measure the leadwire resistance for optimum accuracy Resistor to Shunt Across Select either the upscale Sig to Ex shunt option or the downscale Sig to Ex shunt option Note that the downscale shunt option results in a negative span signal va
154. ift in the stored data set Normally decimation occurs after filtering In this case every fifth sample is stored decimation by five The exact pattern of the stored data varies depending on where the decimation occurs relative to the input step edge 12773 2 0 en HBM SoMat eDAQ lite 16 Xth Percentile Benchmark Tests 12773 2 0 en bridge limillivolts The following benchmark tests give an indication of the eDAQ lite processing limitations for the special case of using the Xth percentile mode of the Statistical Analysis computed channel The primary reason for this benchmark testing is that sorting large arrays can become very time consuming as the size of the arrays increase All of the tests have the following configuration properties e An input data signal using a function generator to produce highly unordered data where nearly every data sample represents a reversal as shown in the plot below FEES test percentile 12 2000Hz 20000 samples sif th100fbridge 1 RN 1 1500 1000 in O oO l in Oo oO oO 1000 1500 2000 49 040 49 045 49 050 49 055 Time secs Figure 16 1 Plot of the input signal to the eDAQ lite as sampled by a test bridge channel e Four bridge channels with 32 bit float output data types e Twelve Statistical Analysis computed channels using the Xth percentile mode to compute the 10 50 and 90 percentile values for each of the four bridge channels e Two Time History DataMode
155. iled information about the error or status flags and can be useful to HBM customer service In TCE the eDAQ lite log is available from the FCS Setup menu Perform diagnostic test If the eDAQ lite cannot repeatedly run the FTP diagnostic test without generating any errors there is most likely a problem with the ELCPU the communication cables or the PC hardware or system configuration If the errors occur at the same spot each time the RAM disk memory is the most likely problem Run an FTP diagnostic test from the Diagnostic submenu in the FCS Setup menu Format RAM disk This is a way of resetting the RAM Disk allocations to a known state Formatting destroys all files in the RAM Disk memory including any SIF data file components so use it with caution If eDAQ lite to PC communications can be established format the RAM disk The Format RAM Disk option is available from the FCS Setup menu 167 I D SoMat eDAQ lite 168 10 2 10 3 10 3 1 Known Problems Test data lost or corrupted after power cycling If the eDAQ lite data file is lost or corrupted after a power cycle the main backup battery is most likely not properly charged Test for a proper charge by turning on the eDAQ lite and disconnecting the power source The eDAQ lite should stay powered from the backup battery for about 45 seconds PC Card file system is corrupt If the PC Card is removed or if the eDAQ lite loses power during a test run with the PC Card
156. ing a single test session Use TCE or the integrated web interface to perform these tasks as well as more advanced test run options Upload Display and Analyze Test Data Use TCE or the web interface to upload the acquired test data The web interface also offers simple data displays For more advanced data display and analysis use SoMat InField For more information on InField refer to the InField User s Manual 21 x ey SoMat eDAQ lite 22 12773 2 0 en HBM SoMat eDAQ lite 2 Using the eDAQ lite 12773 2 0 en 2 1 Status LEDs The following chapter describes the setup and operation of the eDAQ lite including the LED status indicators updating firmware eDAQ lite communications power considerations data storage and eDAQ lite networking eDAQ lite Base System Status LEDs There are three LEDs green yellow and red located on the eDAQ lite front panel that are important indicators of eDAQ lite status Initial State When powering on all three LEDs turn on indicating that the main processor is starting the boot up process However the eDAQ lite displays different LED states than this on abnormal conditions as defined by the following table Red Yellow Green Description 4Hz Off Off Bus pins misaligned 4 Hz 4 Hz Off Blown fuse On On Off Power supply failure or voltages not stabilized On On On No problems detected boot up starting NOTE If all three LEDs stay on for more tha
157. ing test after creating an initial test from scratch To open a previously saved file select Open Setup from the File menu or toolbar Modify the setup as desired using the same methods described for creating a file To save the setup to a different file select Save Setup As from the File menu To support setup files generated outside of the TCE software TCE validates the setup file fields on every open setup command Specifically TCE validates all fields associated with the DataMode computed channel transducer channel and test ID modules The hardware modules are not validated under the assumption that they will be updated using a hardware query TCE generates a log file in the TCE working directory that contains a list of warnings and errors found during validation Notes on Using Setup Files from Previous TCE Versions Consider the following when using setup files from previous versions of TCE 58 Serial bus channels defined in TCE setup files prior to V3 8 2 are invalid Delete these channels from the setup file and add them from the new serial bus databases provided with later releases 12773 2 0 en HBM SoMat eDAQ lite e TCE automatically updates J1708 channels created using the original J1587 version of the database Note that TCE removes all vehicle speed latitude longitude and altitude channels if they exist in the TCE setup file 12773 2 0 en 17 me 4 2 Importing a Network Node The network se
158. input 181 x u SoMat eDAQ lite 12 4 182 Function Pin Wire Color reserved 1 Brown Signal Input 2 White Shield Ground 3 bare wire Excitation 4 Black Excitation 5 Red Signal Input 6 Green ELDIO Digital I O Layer Transducer Cable for Digital I O and Pulse Counter The ELDIO layer uses the SoMat SAC TRAN MP Transducer Cable 1 SAC TRAN MP 2 2 or 1 SAC TRAN MP 10 2 with an M8 connector and a set of color coded pigtail wires The following table lists the pinouts for the SAC TRAN MP cable when used for ELDIO inputs The I O pin depends on the bank connector i e 1 4 5 8 or 9 12 Function Pin Wire Color Quad Encoder Usage VO 4 8 or 12 1 Brown Encoder 2 output B VO 3 7 or 11 2 White Encoder 2 output A GND Shield 3 bare wire Return VO 1 50r9 4 Black Encoder 1 output A Power 5 Red Power VO 2 6 or 10 6 Green Encoder 1 output B NOTE The quadrature encoder outputs as specified are for default signal polarity which assigns the positive direction to clockwise rotation To reverse polarity interchange encoder outputs A and B Vehicle Bus Modules VBM The vehicle bus modules use the SoMat SAC TRAN MP Transducer Cable 1 SAC TRAN MP 2 2 or 1 SAC TRAN MP 10 2 with an M8 connector and a set of color coded pigtail wires The following sections list the pinouts for the SAC TRAN MP cable when used with each available VBM interface 12773 2 0 en
159. ion in the SMART module section of the ELHLS channel setup window on page two For more information on SMART modules see SMART Modules on page 91 Using SMART Utilities Access the SMART utilities in the TCE transducer setup window Highlight a SMART channel or a set of SMART channels and select SMART Utils TCE offers the following three options Program Serially program all selected SMART modules with the transducer channel definition that currently exists and with any added pass through keyword value entries Blank Erase the selected SMART modules restoring the user data areas to their original blanked states LED Locate Repetitively toggle the LEDs of the selected SMART modules indicating the physical location of the selected SMART modules This function must be manually aborted 12773 2 0 en 105 I D SoMat eDAQ lite 106 N l ah 2 6 4 1 En SMSTRB4 Strain SMART Module NOTE The parameters for the SMSTRB4 are integral to the channel calibration To edit any of these parameters first delete the existing calibration Excitation Range The excitation range setting determines the monopolar excitation voltage applied across the bridge Select either 5 or 10 volt excitation for nominal bridge resistances of 350 ohms and greater For smaller bridge resistances only the 5 volt excitation range is available The signal input levels for SMSTRB4 transducers are limited by the
160. ired hysteresis level for the peak valley processing algorithm Histogram DataModes Common Histogram Parameters Accumulate Runs Across All Tests Selecting the accumulate runs across all tests option generates one histogram for all test runs Otherwise the eDAQ lite generates a unique histogram for each run NOTE The option to accumulate across all test runs is available only when using the eDAQ lite RAM storage option with the SIF data format Histogram Bin Type Select evenly divided or user defined bin types Each histogram bin can accumulate counts up to 4294967295 Bin Type Description Evenly Divided The width of each bin is equal The default histogram limits for each input channel are based on the defined full scale values for the input channel The bin size is simply the difference between the histogram limits divided by the number of bins Use the slider in the histogram bin editor to select the number of bins User Defined The width of each bin is defined independently Use the buttons in the histogram bin editor to add or delete bins Define the bin boundaries for each dimension of the histogram in the histogram window NOTE For either of the bin types the eDAQ lite uses underflow and overflow bins to count the occurrences that fall outside of the defined histogram limits Number of Bins Select the desired number of bins for each histogram See the entry for each DataMode for specific information on the number
161. ired test setup files to the eDAQ lite e Set up the eDAQ lite signal conditioner excitation circuits allowing the maximum time for the excitation circuits to stabilize before the test run starts e Create the data file and write some of the header fields e For transducer channels with programmable gains and offsets check the actual full scale limits to verify that the over range protection is sufficient TCE issues a warning for any unusual situations as specified in the TCE General Preferences 4 3 2 Prerun Options After initialization and before starting a test run or between test runs there are a number of prerun options available through the Prerun Options sub menu of the Test Control menu Transducer Checks The transducer checks option provides the ability to run the DVM scope or spectrum displays or perform calibration checks Select the desired channel or channels from the list and the preferred option using the radio buttons and then click Run to execute the option for the selected transducer or transducers Option Description Calibration Check Run a calibration check Note that the calibrations are the current transducer calibrations which may differ from the calibrations defined at test initialization if the transducer has been rezeroed Check for this difference using the rezero offset option DVM Display Run the DVM display Scope Display Run the scope display Spectrum Display Run the spectrum display
162. is recommended over decreasing the socket buffer size Network Mode Select one of the available network mode options detailed in the table below There can only be one master Master GPS Master or Megadac Master in the test setup file There can be any number of slaves For more information on networking using TCE see Networking eDAQ lite eDAQ Systems on page 81 Network Mode Description Master The eDAQ lite ELCPU generates the MSR clock for itself and all other connected slaves defined in the test setup Slave The eDAQ lite does not generate the MSR clock A master eDAQ lite eDAQ or other clock source must route the MSR clock to the eDAQ lite Stand Alone The eDAQ lite ELCPU generates the MSR clock for itself only GPS Stand Alone The GPS on the eDAQ lite ELDIO layer generates the MSR clock for itself only The ELDIO layer must be configured to generate the MSR clock Megadac Master The eDAQ lite ELCPU or ELDIO layer generates the MSR clock for itself and all other slaves defined in the test setup and supplies a derived clock to drive the Megadac The ELDIO layer must be configured to generate the MSR clock GPS Master The GPS on the eDAQ lite ELDIO layer generates the MSR clock for itself and all other slaves defined in the test setup The ELDIO layer must be configured to generate the MSR clock For more information on the ELDIO configuration options used for the GPS and Megadac modes see Config
163. isplay control section on page two of the transducer channel definition dialog box e Prerun The DVM scope plot and spectrum plot display modes are available as prerun options after initialization and before the first test run or between test runs To access the displays select Transducer Checks from the Prerun Options sub menu of the Test Control menu e Run Time Run time displays show the raw signals from input and computed channels on a real time basis providing verification that input and computed channels are functioning properly Run time displays are only available while a test is running The available run time display types are bar chart strip chart digital readout scope plot and spectrum plot Access the display modes from the Run Time Displays option in the Test Control menu or toolbar NOTE TCE stores the run time display channel set and display mode in a RAM disk file When restarting a run time display during a test TCE starts the display in the last used configuration The following table presents a summary of the displays in TCE when they are available and the maximum number of channels each supports 69 I SoMat eDAQ lite Display Pre Init Prerun Run time Max Chs DVM yes yes no 16 or 256 Scope Plot yes yes yes 1 Spectrum Plot yes yes yes 1 Digital Readout no no yes 16 Bar Chart no no yes 16 Strip Chart no no yes 4 ly NOTE an a The maximum number of channels allowed for a group
164. ite stores both the sequence of unclosed reversals and the histogrammed set of closed cycles in the Rainflow DataMode NOTE The algorithm requires an allocated memory stack to store the reversals that have not yet closed The eDAQ lite uses a fixed stack size of 1024 which should suffice for the vast majority of applications In the rare event that this allocation is insufficient the eDAQ lite aborts the Rainflow DataMode processing and sets an error flag in the output data file 203 x ey SoMat eDAQ lite 204 12773 2 0 en HBM SoMat eDAQ lite 18 Cable Resistances The following table lists measured resistances for a selection of SoMat cables Length Resistance Cable m Order Number Ohms Transducer Cable 2 1 SAC TRAN MP 2 2 0 27 10 1 SAC TRAN MP 10 2 1 25 Extension Cable 0 4 1 SAC EXT MF 0 4 2 0 06 2 1 SAC EXT MF 2 2 0 23 5 1 SAC EXT MF 5 2 0 61 10 1 SAC EXT MF 10 2 1 20 15 1 SAC EXT MF 15 2 1 84 12773 2 0 en 205 x ey SoMat eDAQ lite 206 12773 2 0 en ahi SoMat eDAQ lite I 19 CE Compliance The following section provides important notes on the CE compliance of the eDAQ lite hardware and cables 19 1 eDAQ lite Hardware CAUTION eDAQ lite systems are CE compliant with new hardware only Do not remove any CE labeled component or modify a CE labeled component from its original condition Never remove a CE compliant layer from its ring to be fitted int
165. ition TCE sets up the transducer channel in a default mode when the module is added 2 The second partition is designed for pass through information not used by TCE Add any desired information such as physical locations of transducers or associated vehicle or system indentifications All pass through keywords must start with the prefix UI UI followed by the underscore character ELNTB Non Isolated Thermocouple Layer The ELNTB provides non isolated thermocouple inputs in one bank A of 16 channels The ELNTB supports the four most common thermocouple types J K T and E The user specified thermocouple type for each channel is independent of the other channels The 16 channels share a common cold junction resulting in high channel to channel accuracy which is particularly valuable when measuring thermal gradients 12773 2 0 en SoMat eDAQ lite x e z TCB A01 A16 Figure 5 5 Diagram of the 37 pin D Sub connector on an ELNTB layer Each channel uses a notched filter processor that generates about seven samples per second Since these channels are not isolated from each other they can only be used in applications where the individual thermocouples are electrically isolated from each other A cold junction box is required for each bank and is connected to the eDAQ lite with the cables provided using the connectors labeled A01 A16 located on the front panel Each thermocouple is connected to the miniature barrier
166. l using the data in a computed channel which requires a 32 bit floating point input data type For more information on the Engineering Scaler computed channel see Engineering Scaler on page 119 Calibration Table The calibration area of parameters includes the fields necessary to set up a calibration for an input transducer Some transducer types have extra options not covered in this section For more information on calibrating transducers see Calibrating Input Channels on page 59 Mode Select the desired calibration mode 12773 2 0 en x SoMat eDAQ lite 12773 2 0 en 17 me Engineering Value Specify the calibration value in engineering units Input Signal Value Specify the corresponding signal value for the defined value and defined span calibration modes Calibrate Select calibrate to begin calibration for the selected channel If the transducer is already calibrated TCE presents more calibration options NOTE Calibration is only available for defined channels on a connected eDAQ Iite Calibration Date TCE automatically enters the calibration date upon transducer calibration Prerun Rezero Mode Select the prerun rezero mode for the transducer Interactive rezeroing is available for all modes except Not applicable Prerun rezeroing does not affect the fundamental transducer calibration definition Prerun zero offsets are effective for the duration of the test only NOTE The eDAQ
167. lative damage sum NOTE 17 N These basic damage models do not provide any corrections for the mean values of the lt load ranges affecting the cumulative damage NOTE N IT a Existing material databases may be defined in terms of either reversals to failure 2 4 eJ load amplitude A2 or stress amplitude 5 2 Convert to the required parameters as necessary 130 12773 2 0 en x e z SoMat eDAQ lite 12773 2 0 en 7 3 Edit Model Parameters Depending on the model selected several parameters used in the computation are available for modification by clicking the Edit Model Parameters button The following table lists the available model parameters and their corresponding variables in each damage model Parameter Load Life Stress Life Strain Life Elastic modulus E Fatigue strength coefficient Pj So Sf Fatigue strength exponent b b b Fatigue ductility coefficient ef Fatigue ductility exponent c Fatigue limit load limit stress limit NOTE TCE accumulates no damage if the applied load or stress range is less than the fatigue limit parameter Hysteresis Specify the desired hysteresis level for the peak valley processing algorithm Damage Units Select the desired output channel damage units The available units are damage percent life or microdamage Note that the output channel full scale estimates are automatically assigned based on this selection Window Samp
168. le in an ELDIO layer it is possible to configure the eDAQ lite to generate the MSR clock synchronized with the GPS timing signal This mode of operation allows multiple eDAQ lite eDAQ systems to wirelessly synchronize data Use this option only when the GPS module can maintain consistent GPS lock 35 I o SoMat eDAQ lite 36 x a P N s D To set up GPS MSR clock generation select the network mode as GPS Stand Alone see Adding a Network Node on page 55 configure the ELDIO hardware to enable GPS clock generation see Configuration Options on page 86 and define at least one GPS channel in the test setup see Bus Oriented Input Channels on page 108 The test run start time is required to align the data acquired from different eDAQ lite eDAQ units The eDAQ lite logs the start time in terms of GPS time in the data file under the global keyword DF_GPSStartRunTime_ where is the run number The format for the date and time follows the ISO 9161 standard in the format YYYY MM DDThh mm ss ssssthhmm NOTE Because the eDAQ lite writes the start time based on UTC Universal Time Coordinates the final hhmm of the start time which is the signed offset from UTC is always 0000 12773 2 0 en HBM SoMat eDAQ lite 3 Test Control Environment TCE 12773 2 0 en 3 1 The SoMat Test Control Environment TCE software provided with the eDAQ lite is an interface between the eDAQ lit
169. le output between TRUE and FALSE for every sample interval containing a TRUE value The toggle rate is nominally one second 158 12773 2 0 en HBM SoMat eDAQ lite 9 eDAQ lite Web Interface 9 1 9 2 12773 2 0 en The eDAQ lite web interface provides controls to activate saved test initializations start and stop test runs monitor test status and end initialized tests The web interface can also perform a number of system configuration and other utility operations including formatting PC Cards modifying ethernet and serial communication settings and upgrading eDAQ lite firmware with new version releases Main Page With a TCP IP connection between the support computer and eDAQ lite enter the eDAQ lite s IP address into any web browser to access the main page of the eDAQ lite web interface System Hardware Channels Test Data Custom Help e DAQ 11 0 aipha buss 0 SoMat Corporation Figure 9 1 Main page of the eDAQ lite web interface The information bar across the top of the page displays the eDAQ lite s IP address the date and time that the page was loaded and a battery status indicator When a test is initialized the information bar also indicates the name of the test setup the run number and either a go control when the test is stopped or a stop control when a test is running Refresh the page to update the displayed information as the interface does not automatically refresh The tab menu just below the in
170. le when adding a vehicle bus channel to the test setup Hardware Specifics Configure parameters that are applicable to specific vehicle bus hardware interfaces Option VB Interface s Description Baud Rate CAN PWM Specify the desired baud rate ISO9141 KW2000 Internal Termination CAN Select to provide internal vehicle bus termination Disable Active Querying Select the disable active querying option to disable active querying for all vehicle bus input channels Max Rate If the disable active querying option is not selected specify the maximum active query rate which overrides any higher query rates defined in the individual vehicle bus input channel setups Override Database Definitions Select the override database definitions option to modify the default source address i e vehicle bus node address Source Address If the override option is selected specify the desired source address byte in hexidecimal format 5 5 ELBRG Bridge Layer The ELBRG offers four simultaneously sampled low level differential analog inputs through independent connectors The ELBRG layer works with both amplified and unamplified transducers including strain gauges accelerometers pressure transducers load cells and other general analog signals Connect transducers to the ELBRG individually using the M8 connectors located on the front panel 90 12773 2 0 en x SoMat eDAQ lite 12773 2 0 en 5 6 5 7 BRG 1 2 3 4 Figure 5 3 Diagr
171. les Specify the number of input samples used to generate one output sample This sets the analysis window size and associated output sample rate Specify any positive integer value greater than one NOTE There can be some fairly significant computational overhead in generating each output sample particularly when the residual peak valley sequence is relatively long i e 100 residual peak valleys or more Consider this fact when setting the window samples parameter Triggering Computed Channels Trigger computed channels generate a logical channel data stream useful for triggering DataModes or other computed channels 131 I D SoMat eDAQ lite 132 7 3 1 732 Ll NT Interactive Trigger The Interactive Trigger channel provides a means to trigger DataModes and computed channels directly from TCE Up to eight Interactive Triggers are supported For more information on interactive triggering see Using Interactive Triggers on page 67 Input Channel The input channel sets the sample rate of the channel All data types are supported Output Data Type The output channel data type is 8 bit unsigned logical Trigger Index Set the trigger index from 1 to 8 Invert Trigger Select the invert trigger option to reverse the logic of the trigger Trigger Generator The Trigger Generator channel generates a trigger channel that consists of an optional initial delay period followed by a repetitive cycle of on TRUE p
172. lite never performs rezeroing on test runs started after a reset caused by an exception error e g Timeout Calibration or DeviceOverFlow Mode Description Not applicable No rezeroing required Interactive only Rezero interactively only no automatic rezeroing First run only Automatically rezero immediately prior to the start of the first test run only All runs except Automatically rezero immediately prior to the start of every test run power fails except test runs initiated by eDAQ lite power fail resets All runs Automatically rezero prior to the start of every test run This option is not advised for low level inputs 97 I D SoMat eDAQ lite 98 ly NS P sh a EX o l fes t 6 2 6 2 1 Vly N r a t dd EX Value Specify the engineering value associated with the transducer when rezeroed NOTE There is a limitation on rezeroing low level signal conditioners when using high level input levels If the rezero results in the situation where the full scale values exceed the voltage limits of the signal conditioner a calibration error occurs before the test run starts For example suppose the full scale values are 10 0 volts for a signal conditioner with a range of 10 2 volts If the rezero offset is 0 5 volts the eDAQ lite attempts to set limits of 9 5 and 10 5 volts causing a calibration error to occur because the 10 5 volt limit cannot
173. llows two pulse counter channels on each of the three connectors i e bits 1 4 5 8 and 9 12 Note that the quadrature decoder mode requires two adjacent input bits i e 1 2 or 3 4 for the first connector and the odd numbered input connector pin is typically designated encoder output A while the even numbered input connector pin is typically designated encoder output B For ELDIO pulse counters the connector selection is different from other input channels For each pulse counter select the ELDIO layer from the board drop down list bank and connector using the corresponding radio button and input bit from the provided drop down list For more information on ELDIO pulse counters see Pulse Counter on page 85 NOTE Because the quadrature decoder mode requires two input bits it is recommended to define these pulse counter first before other types of pulse counter channels Output Data Type Select an output data type of 32 bit float 32 bit unsigned or 32 bit integer The 32 bit float data type allows any of the operational modes The 32 bit unsigned type limits the available operational modes to time period on time and pulse rate while the 32 bit integer type is available only with the quadrature decoder mode The 32 bit unsigned and integer data types are considerably more efficient from a processing point of view NOTE If the quadrature decoder input channel is expected to exceed about 16000000 counts then using the 32 bit
174. local time _local_minute _local_minute a The minute 0 59 in local time _local_hour _local_hour a The hour 0 23 in local time _local_day _local_day a The day 1 31 in local time _local_month _local_month a The month 1 12 in local time _local_year _local_year a The year in local time _local_day_week _local_day_week a The day of the week 1 7 in local time _local_day_year _local_day_year a The day of the year 1 366 in local time Vly NOTE SES The second time functions can return a value of 60 which indicates the rare case of a p 2 leap second The resulting time sequence in this case is 23 59 59 23 59 60 00 00 00 118 12773 2 0 en SoMat eDAQ lite x e Vly NOTE N m The subsecond time functions return the fractional part of a second at a resolution Aa dependent on the sample rate of the Time Channel input For example a sample rate of 100 Hz results in a resolution of 0 01 seconds and a sample rate of 1000 Hz results in a resolution of 0 001 seconds Application Note Piecewise Linear Relationships In the following example the desired output of the Desk Calculator channel y is defined as follows based on the value of the input channel x 2 1r 100 r gt 100 _ J 2 2r 90 50 lt r lt 100 Y 237480 0 lt 7r lt 50 2 4r 70 r lt 0 The first step is to define the required set of logical Desk Calculator channels s1 s2 3 s4 as follows sl x gt 10e0 s2 x gt 50 amp amp x lt 100
175. lue 103 I D SoMat eDAQ lite 104 6 3 2 Simultaneous High Level Add a simultaneous high level input to any ELHLS connector For more information on the ELHLS layer see ELHLS High Level Analog Layer on page 91 NOTE Each channel on the ELHLS layer can have an independent sample rate and digital filter selection Output Data Type The fundamental data type for ELHLS channels is 16 bit signed which consumes the least amount of data storage while maintaining full 16 bit data resolution The 32 bit float data type adds a great deal of computational overhead and is not recommended for high rate data collection Use the 32 bit floating point option only if the input channel is to be used in subsequent computed channels or DataModes that require the input channels to be 32 bit floating point The 8 bit signed data type adds some computational overhead but may be useful when only a rough picture of the transducer data is required and or data storage limitations are a major concern Digital Filter Type Select the desired type of digital filtering for the channel Digital filters ensure that aliasing of the input signal does not occur Always use a digital filter unless absolutely certain of the frequency content of the input signal The filter options are an eight pole Butterworth filter or a linear phase filter For more information on digital filtering see Digital Filtering on page 195 Break Frequency Specify
176. m value then the minimum value is the first valley and the algorithm state switches to peak search If the maximum value preceded the minimum value then the maximum value is the first peak and the algorithm state switches to valley search Peak Search The algorithm searches for a peak tracking the maximum and minimum values since the last stored valley until their difference exceeds the hysteresis level At this point the maximum value is output as the next peak and the algorithm state switches to valley search Valley Search The algorithm searches for a valley tracking the maximum and minimum values since the last stored peak until their difference exceeds the hysteresis level At this point the minimum value is output as the next valley and the algorithm state switches to peak search Rainflow Cycle Counting Algorithm Rainflow counted cycles are typically used in low cycle fatigue damage analyses The rainflow counting algorithm is based on the one pass algorithm described in the paper Simple Rainflow Counting Algorithms International Journal of Fatigue January 1982 by D Socie and S Downing The algorithm described in this paper generates the set of closed cycles for the input peak valley sequence assuming that the sequence repeats itself However to support proper rainflow histogram addition i e generating a composite rainflow histogram from multiple rainflow histograms defined in a specific sequence the eDAQ l
177. mply with safety requirements could result in death or serious bodily injury Meaning Electrostatic sensitive devices Devices marked with this symbol can be destroyed by electrostatic discharge Please observe the precautions for handling electrostatic sensitive devices 12773 2 0 en x e z SoMat eDAQ lite 12773 2 0 en Symbols pointing out notes on use and waste disposal as well as useful information NOTE Points out that important information about the product or its handling is being given Meaning CE mark The CE mark enables the manufacture to guarantee that the product complies with the requirements of the relevant CE directives the declaration of conformity is available at http www hbm com HBMdoc Meaning Statutory marking requirements for waste disposal National and local regulations regarding the protection of the environment and recycling of raw materials require old equipment to be separated from regular domestic waste for disposal For more detailed information on disposal please contact local authorities or the dealer from whom you purchased the product Working safely Error messages may only be acknowledged if the cause for the error has been removed and no further danger exists Conversions and modifications HBM s express consent is required for modifications affecting the SoMat eDAQ lite design and safety HBM does not take responsibility for damage resulting from unauthorized modifications In
178. n about 10 seconds the boot has failed at a very early stage or the boot was interrupted in the serial loader which should not happen accidentally Possible States After all three LEDs are on the main processor boot up begins The LED states that can exist after the boot up starts are defined as follows Red Yellow Green Description On On On Normal for early in boot up process Off On On Normal for later in boot up process Off Off On Ready no test initialized no error status flag On Off On Ready no test initialized error status flag Off 0 5 Hz On Ready test initialized no error status flag On 0 5 Hz On Ready test initialized error status flag Off 1 Hz 1Hz Ready waiting for sync no error status flag On 1 Hz 1Hz Ready waiting for sync error status flag Off 8 Hz On Ready test running no error status flag On 8 Hz On Ready test running error status flag 23 I D SoMat eDAQ lite Red Yellow Green Description 2Hz On On Updating firmware do not power down 4 Hz 4 Hz 4Hz Power microprocessor not communicating with main processor On On 2Hz Powering down Off Off Off Powered down For more information on error and status flags see eDAQ lite Flags on page 168 eDAQ lite Layer Addressing The eDAQ lite stack is configured at the factory with the layer address jumpers properly set Follow the guidelines below to reconfigure an eDAQ lite stack
179. n accuracy varies with several factors including but not limited to GPS receiver tt a j pe configuration location geographic latitude as it influences HDOP and surrounding objects possibly blocking reception or causing multi path reception satellite constellation status and ionosphere conditions 88 12773 2 0 en T o S SoMat eDAQ lite 12773 2 0 en ly ak 5 3 2 5 4 5 4 1 NOTE There is an anomaly in the acquisition or processing of the GPS time that results in some small discontinuities in the absolute GPS time data This occurs when the nsec channel rolls over and persists for about 20 of the time until the nsec channel rolls over again which takes about 4 hours As such there is at least one second of uncertainty in the GPS time data stored in the data file whether or not the nsec channel is stored Configuration Options Hardware Interface Select the desired GPS hardware interface Databases Select one or more database files from the presented list The selected databases determine the channel types available when adding a GPS channel to the test setup Vehicle Bus Module The ELDIO layer supports vehicle bus modules VBM Only connectors 1 4 and 5 8 support a VBM Use a SAC EXT VB Extension Cable 1 SAC EXT VB 2 to connect the VBM and eDAQ lite If using an additional extension cable make sure the cable connected directly to the eDAQ lite is the SAC EXT VB
180. n number channel number DataMode type sample rate and number of data points Click on the channel name to view basic channel information and the actual data collected during the test run Currently Time History and message channels are the only data types viewable via the web interface Custom Tab Use the Custom tab to install custom modules such as a serial bus module in the eDAQ lite system See the installation instructions provided with the firmware installation for information on specific modules 12773 2 0 en SoMat eDAQ lite x e z When custom modules are installed in the eDAQ lite the page displays a table with the name and installation path of the module the current status enable or disabled and a list of operations available for the module enable disable and remove To discuss a custom module created specifically for your company s needs contact your HBM sales representative 9 8 Help Tab The help tab contains links to help topics on using SIE data and vehicle buses 12773 2 0 en 165 x ey SoMat eDAQ lite 166 12773 2 0 en HBM SoMat eDAQ lite 10 Troubleshooting 12773 2 0 en 10 1 Troubleshooting Procedure When experiencing unusual problems with the eDAQ lite contact HBM customer service for assistance in resolving the situation Expedite this process by being aware of the tools and indicators available for tracking down problems and performing some actions prior to calling
181. nd digital filters cannot eliminate this type of signal corruption which is not aliasing in the strict definition In this scenario the 60 Hz noise must be eliminated before it enters the eDAQ lite signal conditioner All of the above discussion on the use of anti aliasing filters to ensure that the digital data acquired accurately represents the input signal refers to accurately representing the frequency content of the input signal It by no means ensures that the digital data will represent the input signal in terms of providing accurate peak valley data that is critical to time domain analyses such as fatigue analysis In fact to get peak valley data that is guaranteed to provide 1 amplitude accuracy the sample rate must be over 20 times the maximum frequency content of the input signal Digital Filter Characteristics TCE provides two types of digital filters for analog input channels One type emulates an eight pole analog Butterworth filter The second type is an equiripple linear phase finite impulse response FIR digital filter 195 I SoMat eDAQ lite 196 15 2 1 The linear phase filter provides superior performance and is recommended over the Butterworth filter Use the Butterworth filters when it is required to match results with other test systems The characteristics of these filters are shown in the following sections according to the input channel type ELHLS and ELBRG Digital Filters Butterworth Eight
182. ng test run descriptions deselecting it ensures blank test run description fields Require user to verify PC card purge during test initializations Force TCE to issue a verification prompt in order to purge the PC Card during test initialization If not selected TCE purges the PC Card automatically NOTE 7 7 If multiple SIE files exist on the eDAQ lite TCE issues the verification prompt mire regardless of the preference setting r Allow test initializations with channels that are not calibrated Allow TCE test initializations with non calibrated transducer channels This option is not applicable to strain transducer channel types Auto set current communication preference on TCE setup file open When opening a TCE setup file automatically set the current communication preferences If the existing preference matches any network node defined in the opened file the preference remains unchanged Otherwise TCE sets the active eDAQ lite to the master network node or if no master exists the first defined network node Warn user if Warn user if Description Ratio of Calibration Issue a warning if the calibration span is less than the specified Span to Full Scale percent of the full scale span for a transducer channel or vice versa Span lt Difference Between Issue a warning if the difference between the host PC real time clock Host PC and FCS and the eDAQ lite real time clock exceeds the specified number of Clo
183. nnels are used in a Desk Calculator computed channel it is usually more efficient to use the 16 bit integer data type in the transducer channel definition and create an Engineering Scaler computed channel to generate the floating point data needed for most calculator expressions The main advantage of this is that the eDAQ lite can store the original transducer channel as a 16 bit integer instead of as a 32 bit float For more information on the Engineering Scaler computed channel see Engineering Scaler on page 119 Use the large pipe frame size option Using the larger pipe frames significantly improves throughput performance particularly when there are a large number of transducer and or computed channels running at slower sample rates i e 500 Hz or slower Using the larger pipe frames modestly improves throughput performance for most tests with sample rates below or around 10000 Hz At sample rates above 10000 Hz the small pipe frame size option generally results in the best throughput performance This option is selectable on a per test setup basis using the ELCPU configuration options see Pipe Frame Rate on page 84 12773 2 0 en T o SoMat eDAQ lite 12773 2 0 en Avoid redundant calculations in calculator computed channels This is illustrated by the following example of an inefficient usage of eDAQ lite Desk Calculator computational resources Comp 1 In 1 In 2 sqrt In_1 2 In_ 2 2 Comp 2 In 1
184. nput channel selected for the DataMode Hysteresis Specify the desired hysteresis level for the peak valley processing algorithm Peak Valley Slice The Peak Valley Slice DataMode stores a set of master channels and a set of slave channels in the output data file The set of master channels provides a peak valley sequence acquired using the user specified hysteresis value and the peak valley processing algorithm For each peak or valley on any master channel the eDAQ lite 12773 2 0 en T o SoMat eDAQ lite 12773 2 0 en it ZTN D stores data samples for all channels master and slaves in the output data file For more information on the peak valley processing algorithm see Peak Valley Processing Algorithm on page 203 NOTE If no slave channels are required it is more efficient to use the Peak Valley DataMode see Peak Valley on page 152 Master Input Channel Select the desired set of master input channels using CTRL to select more than one channel The master input channel data type must be 8 bit integer 16 bit integer or 32 bit float Slave Input Channel Select the desired set of slave input channels using CTRL to select more than one channel The slave input channels can be any data type Data Type For 32 bit float input channels select one of three available formats for data storage and conversion Data Type Description 32 bit float No conversion is necessary Use the 32 bit fl
185. nput signal pulse frequency is greater than the sample rate the eDAQ lite latches the first pulse frequency measured until it reads the value effectively ignoring subsequent pulses that occur in the sample period after the latched pulse When the input signal pulse frequency is less than the sample rate the eDAQ lite uses the stored pulse frequency for the previous output sample When the input signal pulse train stops for an extended period of time the following occurs The ELDIO counters use 32 bit registers which saturate in about 850 seconds and keep track of the last output pulse period value and the time elapsed since the last pulse was detected If sufficient time passes with no new pulse detected the output is adjusted downward to account for the fact the pulse period is greater than what was previously latched This results in the output pulse frequency value continuously decaying until a new pulse is detected 100 12773 2 0 en SoMat eDAQ lite I High Frequency Inputs in the Pulse Rate Mode Use the pulse rate mode to cover the high frequency input range that cannot be accurately covered using the frequency or time modes i e 50 KHz to 1 MHz The resolution of the average input frequency is equal to the input sample rate For example for an input with a 100 Hz sample rate and 6543 pulses in one sample period the average input frequency over the sample period is 654300 Hz i e the resolution is 100 Hz To make use of
186. o an older eDAQ lite ring Do not disassemble individual layers HBM cannot ensure the CE compliance of any hardware that has been modified or mixed with older hardware The following diagram shows a representative CE compliant eDAQ lite system with current modifications for identification Illustration Modifications oa Generic ir a System T lor CE mark Compliance Electrically conductive o fing gasket gland on system lid replaces original foam gasket All alignment post mating surfaces finished with class 3 chromate Magnetic shielding plate added A oll expansion rings Electrically conductive o ring gasket gland reploces original foom gasket on al expansion rings Heat spreader plate enlarged to completely enclose main processor and finished with class 3 chromate for mproved electrical conductivity O ring gasket added to heot spreader plate to mprove electrical conductivity to the ring Biectrically conductive o ring gasket giand between base and base ring replaces original foam gasket Magnetic shielding plate installed between main processor and moin power supply boards inner surfaces of all system rings and all o ring mating surfaces finished with class 3 chromate Figure 19 1 Exploded diagram of an eDAQ lite system showing all modifications for CE compliance 12773 2 0 en 207 SoMat eDAQ lite I D 19 2 Cables CAUTION HBM cannot ensure the CE compliance of any cable that has been modi
187. o be used in subsequent computed channels or DataModes that require the input channels to be 32 bit floating point The 8 bit signed data type adds some computational overhead but may be useful when only a rough picture of the transducer data is required and or data storage limitations are a major concern Digital Filter Type Select the desired type of digital filtering for the channel Digital filters ensure that aliasing of the input signal does not occur Always use a digital filter unless absolutely certain of the frequency content of the input signal The filter options are an eight pole Butterworth filter or a linear phase filter For more information on digital filtering see Digital Filtering on page 195 12773 2 0 en 101 I D SoMat eDAQ lite 102 l N fa Ps j i ie Break Frequency Specify the break frequency in hertz for the selected digital filter For a Butterworth filter this is the approximate frequency at which the signal attenuation is 3 dB or 70 7 of the unfiltered signal voltage at that frequency For a linear phase filter the field is named the roll off start frequency and is the approximate frequency at which the signal starts to attenuate The eDAQ lite automatically selects a default break frequency value to ensure that no aliasing occurs The selection is based on the A D converter rate and the choice of digital filter type NOTE The check box field labeled data is prot
188. o the Nyquist frequency i e half the sample rate and the log y axis to cover up to six decades The data points are the approximate sine amplitude of the signal components at each frequency The data point at 0 Hz in the DC level of the signal The spectrum plot is available for a single channel at pre initialization as a prerun option and as a run time display For more information on spectrum plot display preferences see Scope and Spectrum Display on page 51 12773 2 0 en 73 I o SoMat eDAQ lite 74 4 5 6 Cumulative Spectrum Analyzer Gripper i E x FrameAverages g amples Wols FS Units View Mode For Da Reset 52 gt Critr a y Eng Sean ca Half Life fo I Games Ampl Z Volts Hold Opts Help Note Select the Hold View Mode and then Reset to Enable other Options DC 98 8832 1e 882 Sine Amplitude Frequency Hz 508 Figure 4 5 A TCE spectrum plot as a prerun option display Samples Select the desired number of samples used in the FFT algorithm to generate the frequency spectrum Grid Lines Select the grid lines option to add grid lines to the spectrum display The grid lines divide the x axis into 10 equal parts and the y axis on a log scale in decades Half Life Select the desired half life value The spectrum half life specifies the amount of old data to combine with the newly acquired data For example if the half life is one the contribution of the
189. oMat Communications Cable to the Comm connector on the eDAQ lite For Ethernet communication connect the RJ 45 connector either directly to the PC or to an Ethernet hub depending on the communications table For serial communication connect the 9 pin D Sub connector directly to the PC The serial connection may be removed once the setup process is complete but it may be helpful in network setup should difficulties arise with Ethernet communication Connect the appropriate cable s to the eDAQ lite for the desired type of transducers or sensors Make sure the power supply for the eDAQ lite is turned off and connect the SoMat Power Cable 1 SAC EPWR15 2 between the eDAQ lite Power connector and the power supply Use the red and black pigtails on the cable labeled POWER for the main power connection black to the negative or ground terminal and red to the positive terminal The remote cable labeled REMOTE POWER is for remote control of the eDAQ lite To use remote power connect a single pole single throw switch to the pigtails If not using remote power make sure the pigtail wires are well insulated as shorting the two wires together turns the eDAQ lite off For more information on remote power usage see Remote Power on page 30 Turn on the power supply If the status LEDs do not light press the power switch on the front panel to apply power to the eDAQ lite Test Process There are several phases to conductin
190. oat mode for computed channels where full scale estimates are uncertain or unknown 16 bit integer Maintain the resolution of both the 12 bit and 16 bit A D converters 8 bit integer Lose significant resolution in both the 12 bit and 16 bit A D converters Use the 8 bit integer mode only for a rough picture of channel behavior NOTE Using the integer data types requires that valid full scale minimum and maximum values are defined for each input channel selected for the DataMode Time Input Channel Optionally select a Time Channel computed channel from the provided list For more information on the Time Channel computed channel see Time Channel on page 136 Plateau Size Specify the criterion for storing a peak or valley candidate slice as a plateau event The size refers to the minimum number of peak and valley slices in the holding queue that must exist before the eDAQ lite stores the blocking peak or valley candidate slice as a plateau event For example if the plateau size is 50 then at least 50 peak and valley slices must exist in the holding queue before treating the blocking peak or valley 153 I D SoMat eDAQ lite 154 N ty 1 8 4 8 4 1 i 8 4 2 candidate slice as a plateau Note that for most typical usages of the Peak Valley Slice DataMode using multiple master channels there will be very few if any slices stored on this plateau criterion Hysteresis Specify the des
191. ocation is 4 MB or more then selecting the DRAM option is not advised and can cause a DeviceOverFlow error when the eDAQ lite attempts to copy the DRAM buffers to the PC Card memory For the gray area in the 500 kB to 4 MB range first try not using the DRAM buffers Examples e Do not use DRAM buffering One Burst History DataMode defined with 16 channels of 16 bit integer data sampled at 1000 Hz for 600 seconds requires 9200000 bytes 16 2 1000 600 per burst record 150 12773 2 0 en HBM SoMat eDAQ lite e Use DRAM buffering One Burst History DataMode defined with 16 channels of 16 bit integer data sampled at 500 Hz for 20 seconds requires 320000 bytes 16 2 500 20 per burst record Try not using DRAM buffering One Burst History DataMode defined with 16 channels of 16 bit integer data sampled at 500 Hz for 10 seconds requires 320000 bytes 16 2 500 20 per burst record and a second burst DataMode defined with 8 channels of 32 bit float data sampled at 2000 Hz for 10 seconds requires 640000 bytes 8 4 2000 10 per burst record for a total of 960000 bytes 12773 2 0 en l7 me 8 3 3 Event Slice ZN The Event Slice DataMode stores a set of master channels and a set of slave channels in the output data file The set of master channels provides a sequence of events which are defined as changes in the state of any master input channel For each event the eDAQ lite stores data samples for all channels masters and slav
192. old spectrum data is half of the contribution from the new data If the half life is ten it takes ten new frames of data before the old data is at half its influence The default value is zero which results in no data accumulation For situations with stable signal content a larger half life produces a display with fewer fluctuations and a better representation of signal content Digital Readout The digital readout display continuously shows two sets of minimum and maximum readings in a digital format for up to 16 channels The last reading min and max columns display the minimum and maximum values from the latest reading The since reset min and max columns show the overall minimum and maximum values since the start of the display or the last reset The digital readout is available as a run time display only 12773 2 0 en We SoMat eDAQ lite Run Time Display for FCS Test 192 168 0 16 start Hur Figure 4 6 A TCE digital readout run time display Reset Click the Reset button or use the ALT R keyboard shortcut to reset the tracking and display of the overall minimum and maximum values 4 5 7 Bar Chart The bar chart display uses solid horizontal bars to continuously show the most recent minimum and maximum data values for up to 16 channels TCE uses an arrow head to point to the bar when the bar is very thin The chart also uses cross hatched horizontal bars to show the overall minimum and maximum values since the start of th
193. olor Select the desired color for drawing the signal traces or bars Screen color Select either black or white as the background screen color Strip chart plot mode Select the desired behavior when the signal trace reaches the right edge of the plot Option Description Normal The signal trace begins again at the left side of the plot Scroll The signal trace scrolls continuously to the left at the rate at which data is received and with the current value at the right edge Mixed The right half of the signal trace moves to the left half of the plot and the signal trace continues from the middle of the plot Show strip chart grid lines Activate visible grid lines on the strip chart plot Group DVM Display Select one of three display modes for group DVM displays 12773 2 0 en x e z SoMat eDAQ lite 12773 2 0 en Option Description Original Static Use static control fields and limit to a maximum of 16 channels Scroll List Use a scrollable list control with sizable fields channel ID current value and units Limit to a maximum of 256 channels Scroll List Extended Use a scrollable list control with sizable fields network connector ID channel ID current value saturation bounds and units Limit to a maximum of 256 channels Auto Range Options NOTE Access the auto range options from the Test Control menu NOTE Automatically chain this task to the stop run task using TCE General Pref
194. other inputs As such the inherent skew always a lag for vehicle bus inputs is dependent on how much time elapses between the actual data sampling on the vehicle computer s and the time it takes for the vehicle bus message to be posted by the source processor and read and time stamped by the eDAQ lite Thermocouple Channel Synchronization The ELNTB channels source from a clock on these layers that is not synchronized to the eDAQ lite MSR clock There is a latency of about 70 milliseconds between the actual time the data is sampled and the time the data is made available to the eDAQ lite for reading and time stamping Networked eDAQ lite eDAQ System Synchronization Hardwired Network Synchronization Master Mode For a set of hardwired networked eDAQ lite eDAQ systems the data acquired on all of the slave nodes lead the data acquired on the master node by approximately one to two microseconds The reason for this is that there is a one to two microsecond delay in the propagation of the sample clock signal from the master to the slaves GPS Master Mode When using the GPS master network mode the slave data channels lead the master by the following e ELDIO GPS clock 100 kHz MSR 90 microsecond lead time e ELDIO GPS clock 98 304 kHz MSR 112 microsecond lead time Because of these limitations on GPS master data synchronization it is recommended to use the GPS master mode with ELDIO GPS clock generation only at low sample rates on the or
195. ough the diode when the LED is on For more information on output current limitations refer to the ELDIO data sheet Power 5 V red s ELDIO SAC TRAN MP vo R VO Signal Figure 13 4 Wiring diagram for using an LED on an ELDIO output 13 2 ELHLS High Level Analog Layer 13 2 1 Analog Input Use the SoMat SAC TRAN MP Transducer Cable 1 SAC TRAN MP 2 2 or 1 SAC TRAN MP 10 2 to wire ELHLS analog inputs NOTE N N Do not use this wiring diagram for ELBRG channels I 186 12773 2 0 en SoMat eDAQ lite I o Signal white ELHLS SAC TRAN MP v Signal green Figure 13 5 Wiring diagram for a standard analog input on an ELHLS layer 13 2 2 SMSTRB4 Strain SMART Module Use the SoMat SAC TRAN MP Transducer Cable 1 SAC TRAN MP 2 2 or 1 SAC TRAN MP 10 2 to wire SMSTRB4 inputs The following diagrams are also applicable to older SMART bridge modules that support one fixed bridge type Excitation ELHLS SAC EXT MF SAC TRAN MP s Signal s SMSTRB4 Cu Excitation black Signal white Figure 13 6 Wiring diagram for a full bridge configuration using a Strain SMART Module Figure 13 7 Wiring diagram for a half bridge configuration using a Strain SMART Module Excitation ELALS SAc ExT MF SAC TRAN MP SMSTRB4 green Excitation black 12773 2 0 en 187 SoMat eDAQ lite I o Excitation ELHLS SAC EXT MF SAC TRAN MP
196. own 1 Ng D CANH 2 White 6 AGnd 3 bare wire Power 5 Red 12 V REF 5 Red SWC CANL 6 Green 12 5 4 Transducer Cable for IS09141 KW2000 Interface The following table lists the pinouts for the SAC TRAN MP cable when used with the IS09141 KW2000 interface Ly NOTE N ah a Always provide the VBAT voltage for the ISO9141 KW2000 module to function 4 Function Pin Wire Color x 1809141 K Line 2 White X I 3 AGnd 3 bare wire 6 4 VBAT 5 Red 1S09141 L Line 6 Green 184 12773 2 0 en HBM SoMat eDAQ lite 13 Device Wiring 13 1 13 1 1 ELDIO vo ELDIO vo 13 1 2 12773 2 0 en The following sections provide device wiring diagrams for all applicable layer types For more information on using each transducer see eDAQ lite Hardware on page 83 and Input Channels on page 95 For complete pinouts for the cables used in the following sections see Cable Pinouts on page 179 ELDIO Digital 1 0 Layer Digital Input Use the SoMat SAC TRAN MP Transducer Cable 1 SAC TRAN MP 2 2 or 1 SAC TRAN MP 10 2 to wire ELDIO digital inputs Preferred Switch Whenever possible a single pole double throw switch wired as shown below should be used for switched inputs This circuit solidly switches the input line to either ground or 5 volts and prevents coupling of the input line to other digital input lines Moving the switch to the ground side is identified as FALSE Power 5 V red
197. particular any repair or soldering work on motherboards is prohibited When exchanging complete assemblies it is essential to use original HBM parts only The product is delivered from the factory with a fixed hardware and software configuration Changes can only be made within the possibilities documented in the manuals Qualified personnel The equipment may be used by qualified personnel only the specifications and the special safety regulations need to be followed in all cases This means people who meet at least one of the three following requirements e Knowledge of the safety concepts of automation technology is a requirement and as project personnel you must be familiar with these concepts e As automation plant operating personnel you have been instructed how to handle the machinery and are familiar with the operation of the equipment and technologies described in this documentation e As commissioning engineers or service engineers you have successfully completed the training to qualify you to repair the automation systems You are also authorized to activate to ground and label circuits and equipment in accordance with safety engineering standards It is also essential to comply with the appropriate legal and safety regulations for the application concerned during use The same applies to the use of accessories The term qualified personnel refers to staff familiar with the installation fitting start up and operation of
198. pliance 207 19 1 eDAQ lite Hardware 207 19 2 Cables 208 12 12773 2 0 en I e z SoMat eDAQ lite 12773 2 0 en Safety Information The supply connection as well as the signal and sense leads must be installed in such a way that electromagnetic interference does not adversely affect device functionality Automation equipment and devices must be covered over in such a way that adequate protection or locking against unintentional actuation is provided such as access checks password protection etc When devices are working in a network these networks must be designed in such a way that malfunctions in individual nodes can be detected and shut down Safety precautions must be taken both in terms of hardware and software so that a line break or other interruptions to signal transmission such as via the bus interfaces do not cause undefined states or loss of data in the automation device Before connecting the device make sure that the mains voltage and current type specified on the type plate correspond to the mains voltage and current type at the site of installation and that the current circuit used is sufficiently safe The maximum permissible supply voltage for the eDAQ lite is 18 V DC for the ELCPU processor and 55 V DC for the ELCPU PLUS processor Appropriate use The eDAQ lite and its connected transducers may be used for measurement tasks only and directly related control tasks To ensure safe operation the transducer
199. plications require the use of all three wires To accurately measure the leadwire resistance use the four wire resistance measurement method Nominal resistance values for transducer cable wires can help to estimate the leadwire resistance see Cable Resistances on page 205 However since contact resistances at mechanical connections are difficult to estimate measure the leadwire resistance for optimum accuracy Resistor to Shunt Across Select either the upscale Sig to Ex shunt option or the downscale Sig to Ex shunt option Note that the downscale shunt option results in a negative span signal value NOTE For older SMART bridge modules the resistor to shunt across is fixed at production Hardware Configuration Click the hardware button to view the SMART module user data parameters as they are defined in the hardware setup configuration Note that TCE does not update reprogrammed SMART modules until a hardware query is performed 107 I D SoMat eDAQ lite 108 6 4 2 6 5 6 5 1 6 6 SMITC Thermocouple SMART Module NOTE The eDAQ lite uses the full scale min and max values defined in the ELHLS parent channel to configure the converter that outputs analog voltage as a function of computed thermocouple temperature To optimize the temperature measurement accuracy set the full scale values as close as possible to the temperature extremes expected in the test Thermocouple Type Select the type of t
200. pload option becomes unavailable as soon as a new test is initialized since the eDAQ lite deletes the RAM disk SIF component file upon initialization NOTE If there is a communications failure between the PC and the eDAQ lite during an upload of the files on the PC Card TCE enters a loop of making repeated attempts to re establish communications so that the upload process can recover and continue This recovery scheme handles most types of communication failures such as power lost to the eDAQ lite temporarily or Ethernet connections broken temporarily If necessary abort the communications loop using the Abort option in the upload progress window NOTE To increase data analysis performance chain frame demultiplexing to the upload process using TCE General Preferences 12773 2 0 en x SoMat eDAQ lite 12773 2 0 en IL Tk 4 6 3 Extracting Data from SIE or SIF Files SIE an SIF files contain more information than what is available when viewing uploaded data To access this information select Open SIE or SIF File from the File menu NOTE When opening a SIF file TCE checks the file for any frame multiplexed data records If they are present TCE presents the option to demultiplex all frame multiplexed data records Analysis routines that run on a channel by channel basis typically execute significantly faster using fully demultiplexed data records Select one of the following options to access additional test
201. r of channels defined at lower sample rates lt 500 Hz Using the lowest pipe frame rate also modestly improves throughput performance for most tests with sample rates below 10000 Hz At sample rates above 10000 Hz a higher pipe frame rate generally results in the best throughput performance Because TCE run time displays run at the pipe frame rate higher pipe frame rates may be desired Default data option Select the default option for how the eDAQ lite stores data For more information on the SIE and SIF data formats see Data Formats on page 33 12773 2 0 en x SoMat eDAQ lite 12773 2 0 en Option Description SIE delete old SIE files on test init Collect data in the SIE file format and limit the number of SIE files on the eDAQ lite to one emulating the behavior of SIF files SIE Collect data in the SIE file format and allow multiple SIE files on the eDAQ lite at the same time SIF Collect data in the SIF file format Only one SIF file is allowed on the eDAQ lite at one time SIE and SIF Collect data in both the SIE and SIF file formats and limit the number diagnostic delete SIE of SIE files on the eDAQ lite to one This option consumes eDAQ lite storage twice as fast and places significantly increased demand on the eDAQ lite processor SIE and SIF Collect data in both the SIE and SIF file formats This option consumes diagnostic eDAQ lite storage twice as fast and places
202. ranging from 0x1 to OxFF Invert Output Logic Select the invert output logic option to invert the output logic defined in the bitmap check mode Note that using inversion can identify anomaly marked data segments and output a trigger stream to gate out these data segments in any desired computed channels or DataModes Test Run Stopper The Test Run Stopper channel stops a test run when the input channel becomes TRUE NOTE To automatically start a test run after the Test Run Stopper stops a run use the remote control option with the run control switch always in the run position For more information on remote control see Using Remote Control Operation on page 80 135 I D SoMat eDAQ lite NOTE The test run does not stop immediately when the input channel becomes TRUE Because the input channel is processed in frames that can be buffered the test run typically stops in a fraction of a second after the input channel becomes TRUE In the worst case assume that several seconds could elapse before the test run actually stops Input Channel The input channel data type must be 8 bit unsigned logical Output Data Type The output channel data type is 8 bit unsigned logical Application Note Stopping a Test After a Defined Time Period To stop a test run after a certain amount of run time do the following Define a Time Channel computed channel see Time Channel on page 136 and select the 32 bit float data
203. rantees that the digitized signal is not aliased by higher frequency content components of the analog signal In other words the digitized signal accurately represents all frequency content of the analog signal below the nominal low pass filter cut off value Note that the analog and digital filters do not have infinitely sharp low pass characteristics The amount of filter attenuation as a function of frequency is highly dependent on the type s of digital filters used Use of these filters is most critical for low level signal conditioning e g for low level Strain SMART Module channels Low level signal conditioners are more susceptible to both eDAQ lite external and eDAQ lite internal electronic noise aliasing since the strain signals are typically in the millivolt range The signal conditioner gain amplifiers amplify the noise components as well as the actual strain signal components In harsh electromagnetic interference EMI environments the noise contributions can even be larger in magnitude than the actual strain signal contributions Fortunately these EMI contributions often have much higher frequency content than the actual strain contributions and can therefore be eliminated with the use of the appropriate analog and digital filters Note that there are situations where the EMI frequency content is in the same range as the actual signal frequency content One classic example of this is 60 Hz AC power line noise induction The analog a
204. re information on quadrature encoder inputs see Pulse Counter on page 99 Input Channel The input channel data type must be 32 bit float 32 bit integer or 32 bit unsigned Output Data Type The output data type is the same as the input data type Trigger Channel Select the input channel used to determine when to zero suppress the input channel based on the trigger condition Trigger Mode Select from three available trigger modes to specified the trigger channel behavior The available trigger mode options are below Trigger Mode Description When TRUE Suppress when the trigger channel is TRUE On FALSE TRUE edge Suppress when the trigger transitions from FALSE to TRUE On TRUE FALSE edge Suppress on the sample after the trigger channel transitions from TRUE to FALSE Suppression Value Define the desired suppression value The default suppression value is zero Keep in mind that if the input channel is a 32 bit float the suppression value is in engineering units but if the input channel is either a 32 bit integer or a 32 bit unsigned the suppression value is in integer counts For clarification suppose a quadrature decoder 12773 2 0 en x e z SoMat eDAQ lite 12773 2 0 en 4 a In 7 3 5 7 3 6 Fi channel uses the 32 bit integer data output option the calibration slope is defined such that 2048 counts equals 360 degrees and the calibration intercept is zero To set the
205. re setup The following examples illustrate the eDAQ lite conventions e ELBRG For an ELBRG layer with an ID of Brg_1 connector IDs Brg_1 c01 through Brg_1 c16 denote the set of 16 bridge transducer connections e ELDIO For an ELDIO layer with an ID of DIO_1 connector IDs DIO_1 apc1 through DIO_1 apc6 denote the set of 6 pulse counter connections on Bank A Description Use up to 63 characters to more fully identify the transducer Type Specify the type of measurement such as strain load or acceleration associated with the transducer or computed channel Select a type from the list or directly enter a user defined type Since TCE uses the value of the type field throughout the test setup process always complete this field Units Specify the measurement units for the transducer Since TCE uses the value of the units field throughout the test setup process always complete this field 95 I D SoMat eDAQ lite 96 Output Sample Rate Output Sample Rate Select the sample rate for the input channel The sample rate options are factors of the defined master sample rate 100 kHz or 98 04 kHz The sample rate should be at least two times the maximum frequency content of the input signal to ensure that the bandwidth of the signal is completely characterized When available using a digital filter can limit the frequency content of the input signal Full Scale Values Full Scale Min and Max Specify the expected extreme val
206. red directly by HBM Contact your sales representative or visit www hbm com somat for more information 1 3 Setting Up the System Setting up the eDAQ lite data acquisition system involves installing TCE on the support PC and setting up the eDAQ lite hardware 18 12773 2 0 en x SoMat eDAQ lite 1 3 1 Installing SoMat Test Control Environment TCE To install TCE 1 Run the TCE installer found on the TCE eDAQ lite distribution CD or downloaded from the www hbm com somat Follow the instructions on screen 2 When prompted enter the desired destination folder for the installation By default the TCE installation program places each new software release in a unique folder 3 If updating to a new version of TCE copy or move the file TceMS ini from the Work subdirectory of the previous TCE installation folder to the Work subdirectory of the new TCE installation folder This process transfers the current TCE preference settings into the new version of TCE Using a Common Installation Folder Previous versions of the TCE installer used a common destination folder for all releases To continue using a common folder uninstall the previous TCE version before starting the new installation Change the installation program default folder name to the common folder name previously C Program Files SoMat Tce_eDAQ during the installation process To keep TCE preference settings be sure to save the TceMS ini
207. rence for Time History DataModes is in the TCE Preferences menu Min max tracking can consume significant CPU cycles with a lot of Time History DataMode storage Use a second eDAQ or eDAQ lite in networked mode If another eDAQ or eDAQ lite is available use it in networked mode with the first eDAQ lite and split the processing load as evenly as possible between the two eDAQ lite eDAQ systems For more information on networking see Networking eDAQ lite eDAQ Systems on page 35 and Networking eDAQ lite eDAQ Systems on page 81 Reduce the scope of the test As a last resort reduce the scope of the test by reducing sample rates reducing channel counts or eliminating computed channels and DataModes 173 x ey SoMat eDAQ lite 174 12773 2 0 en HBM SoMat eDAQ lite 11 Data Types The eDAQ lite supports the following data types e 32 bit float e 32 bit integer e 32 bit unsigned e 16 bit integer e 16 bit signed e 16 bit unsigned e 8 bit integer e 8 bit signed e 8 bit unsigned logic bitmap message The following table summarizes the data types supported by each input channel computed channel and DataMode Category Channel Type Input Data Type Output Data Type Input Channel Bridge 16 bit signed 32 bit float 8 bit signed 12773 2 0 en Bus Oriented 8 bit unsigned Vehicle Bus 16 bit unsigned GPS 32 bit unsigned Serial Bus 32 bit float using conversion Digital Inp
208. responding pin on the 26 pin D Sub Comm connector RJ 45 Ethernet Connector 26 Pin RJ 45 Wire Color Wire Color Function D Sub Pin X O HUB 10 100 BASE T Receive 3 3 Orange White Green White 10 100 BASE T Receive 4 6 Orange Green 10 100 BASE T Transmit 2 1 Green White Orange White 10 100 BASE T Transmit 1 2 Green Orange 179 x SoMat eDAQ lite 180 D gt lt 7 D Oo 2 0 on 12 1 2 LEMO Networking Connector Connector Function an LEMO Pin Wire Color Sync 1 Clock 5 1 Red Clock 8 2 Black Shield 7 3 bare wire Sync 2 Clock 6 1 Red Clock 9 2 Black Shield 7 3 bare wire 9 Pin D Sub Serial Connector Function 26 Pin D Sub Serial Pin Wire Color CTS clear to send 17 7 Yellow DCD data carrier detect 10 4 Red DSR data set ready 15 1 Violet DTR data terminal ready 13 6 Orange Rx received 11 3 Brown RI ring indicator 18 9 Blue RTS request to send 16 8 Green Tx transmitted 12 2 Black Ground 14 5 Gray NOTE This information is for the current communications cable which is a fully molded connector cable assembly The original communications cable is not a molded assembly and differs as follows from the current cable ground on the serial connector is white instead of gray and the HUB 10 100BASE T Receive and Transmit colors are white orange and white green respectively Power Cable The SoMat EPWR15 Power Cable 1
209. review synchronously TCE gets SIF file data from the eDAQ lite eDAQ nodes in a serial manner TCE appends a qualifier string to the default PC file name to distinguish the SIF files For example if the test setup file name is MyTest tce and there are three networked nodes the default SIF data file names are MyTest 1 of 3 sif MyTest 2 of 3 sif and MyTest 3 of 3 sif TCE applies the same default naming convention when transferring files from a PC Card Using Remote Control with a Network For remote control with an eDAQ lite eDAQ network use the remote control hardware i e the ELDIO interface hardware only on the master node This applies to both the test run control input and the optional test monitoring output digital lines NOTE The preview run option is not supported in remote control mode The slave eDAQ lite eDAQ systems automatically start a new test run immediately after test initialization and after each test run stops as long as the remote control is not suspended Because of this be careful to not start the master until the slaves are all running and waiting for the master to assert the MSR clock source The green and yellow front panel LEDs blink in unison when the slave is in this ready state Failure to do this prevents synchronization of the slave and master data The automatic test runs prevent normal actions such as removing the PC Card or ending the test after a test run stops To perform these actions first suspen
210. rt display preferences see Run Time Display on page 52 NOTE The x axis of the strip chart is not a linear time base The display update period is determined by the processing time required plus a built in delay Actions such as changing the plot mode or placing the display on hold significantly affects the update period In steady state operation the x axis is usually a good approximation of a linear time base 12773 2 0 en I o SoMat eDAQ lite 12773 2 0 en 4 6 Run Time Display for FCS Test 192 168 0 16 i x lolev_1 microstrain 2500 0 uus Normal Scroll Mixed J Show Grids Figure 4 8 A TCE strip chart run time display Plot Mode Select one of three strip chart plotting modes Plot Mode Description Normal When the plot reaches the end of the x axis TCE erases the display and draws the next vertical bar at the beginning of the x axis Scroll The vertical bars continuously scroll from left to right after the plot reaches the end of the x axis for the first time The latest min and max values are always at the end of the x axis Mixed When the plot reaches the end of the x axis TCE moves the last half of the display to the first half and resumes plotting from the middle of the display Show Grids Select the show grids option to show the grid lines on the display Uploading Test Data Uploading test data transfers all or selected test runs resi
211. rt the PC Card and initialize or start the test PCMDataLosses The PCMDataLosses flag indicates that a test did not complete the power failure exit procedure or an error reset exit procedure The flag can only occur if the test is running with the PC Card data storage option The typical scenario is a power failure with a dead or disconnected backup battery In almost all cases this flag indicates loss of some of the test data from the previous run PCMDiskError The PCMDiskError flag indicates that there was a PC Card I O error while running a test or attempting to transfer data from the eDAQ lite It is likely that the PC Card has been removed been damaged in some way or has had some intermittent problem Data integrity is suspect PCMDiskFull The PCMDiskFull flag indicates that there is no more PC Card storage space available for test data DataModes that require additional memory for example Time History Peak Valley etc are suspended but histogram DataModes keep running normally Let the test run continue or stop the test as desired Note that attempting to start a new test run without sufficient PC Card space to start causes the eDAQ lite to reboot itself PCMSIFCorrupt The PCMSIFCorrupt flag indicates that the eDAQ lite has found corruption in the SIF data file component on the RAM Disk This flag stops the test run and ends the test Transfer the test data to the PC and reformat the RAM Disk There can be major losses of test d
212. s one to store the four bridge channels and the other to store the twelve Xth percentile mode Statistical Analysis computed channels e All data storage in the eDAQ lite internal flash memory After some preliminary testing the following four tests were performed for final benchmarking The only varied parameters were the bridge channel sample rate and the size of the Statistical Analysis channel analysis window 201 SoMat eDAQ lite x u Test Bridge Sample Rate Analysis Window Size Test 1 2000 Hz 20000 samples Test 2 2000 Hz 50000 samples Test 3 5000 Hz 20000 samples Test 4 5000 Hz 50000 samples All of the tests were run for several minutes to determine if the eDAQ lite can handle the processing load The first three tests ran with no problems However Test 4 reset on a DeviceOverFlow error shortly after the start of the test run 202 12773 2 0 en HBM SoMat eDAQ lite 17 Data Processing Algorithms 12773 2 0 en 17 me 17 1 17 2 Peak Valley Processing Algorithm There are three states in the peak valley processing algorithm The algorithm starts in the initialize state Thereafter it toggles between the peak search and valley search states These states are detailed as follows Initialize The algorithm tracks the maximum and minimum input values until the difference between the maximum and minimum exceeds the specified hysteresis level If the minimum value preceded the maximu
213. s Detection determine if the data exceeds the user defined kurtosis coefficient limit Bits 5 through 8 are reserved for future expansion 142 12773 2 0 en x e z SoMat eDAQ lite 12773 2 0 en 7 5 5 The units parameter is always logic and the full scale min is fixed at zero The full scale max is the integer value of the largest possible output byte For example if using the kurtosis and drift detection routines the highest active bitmap is binary 00001010 which equals ten Input Channel The input channel data type must be 32 bit float Output Data Type The output channel data type is 8 bit unsigned bitmap The only computed channel or DataMode that accepts a bitmap input is the Bitmap Trigger computed channel Window Samples Specify the number of input samples to to generate one output sample This sets the analysis window size and associated output sample rate The factor can be any positive integer greater than one Flat Line Detect Select the flat line detect routine to enable flat line detection If the difference between the maximum and minimum data samples in the analysis window is less than the specified range gate bit 1 of the output byte is set to 1 Drift Detect Select the drift detect routine to enable drift detection TCE sets the reference mean as the mean value of the first window for each test run If the difference between the current window mean and the reference mean exceeds the specified
214. s channel can translate to a simple load life fatigue damage assessment for the test run For example assuming that a load life relationship is given by S S N where Ais the constant load range cycles to failure S is the load range when N equals 1 and mis the damage slope Assuming that S equals the product of some coefficient A and the input channel it follows that the fractional fatigue damage per block i e per test run 7 B is given by B Y S Note that load life relationships are most typically defined in terms of load amplitude versus cycles to failure instead of in terms of load range versus cycles to failure as in the above example 7 2 10 Fatigue Damage The Fatigue Damage channel generates an output stream of fatigue damage for the selected input channel The fatigue damage computations are based on the selected fatigue damage model material parameters and on optional input and output scaling parameters Scaling the input channel can be useful for example in converting transducer data in microstrain units to dimensionless strain units required for the fatigue processing models TCE processes the optionally scaled input channel on a point by point basis through a rainflow cycle counter using the user defined hysteresis value for peak picking For each closed cycle the computed fatigue damage is added to the running sum of cumulative fatigue damage based on the user selected fatigue damage model For each output sample
215. s is required to avoid numerical problems with data channels where the minimum and maximum values acquired are the same or very nearly the same NOTE In some special situations the same transducer or computed channel may be stored in more than one Time History DataMode In this case TCE uses the first occurrence in relation to the definition order in the TCE setup file of the duplicated channel for display and auto range operations 12773 2 0 en HBM SoMat eDAQ lite 4 Using TCE 12773 2 0 en lt ak 4 1 The following chapter provides detailed information on performing the various tasks available using TCE These include defining a test setup calibrating transducer inputs running a full test monitoring eDAQ lite status and transducer inputs before during and after test runs uploading test data for analysis configuring remote control operation and setting up a network of eDAQ lite eDAQ systems Defining a Test Use the TCE setup windows to define a new test or modify an existing test The steps involve in defining a test include specifying one or several eDAQ lite systems used in the test by creating a network node or a set of network nodes configuring the hardware layers and modules installed on the defined nodes and adding transducer channels computed channels and DataModes to acquire manipulate and store test data Adding a Network Node To add an eDAQ lite network node and defin
216. s on the highlighted channel To run another shunt check select run shunt check NOTE The eDAQ lite stores the shunt check information file in a global keyword accessible area of the SIE or SIF data file For more information on extracting this file see Extracting Data from SIE or SIF Files on page 79 NOTE The shunt span calculations do not correct for leadwire resistance effects or the slight deviations of the actual shunt resistances from the nominal resistances Therefore the stored shunt spans are not as accurate as the calibration shunt spans are more than sufficient for documenting changes in transducer response from run to run NOTE If the voltage readings for any shunt check span exceeds the limit for the type of signal conditioner TCE tags the reported span as invalid by marking it with a string Previewing a Test Run A preview run effectively starts a test run with all DataMode storage suppressed All of the transducer channels and computed channels run in preview mode just as they would during a data collection run To start a preview run select Preview Run from the Test Control menu or toolbar 12773 2 0 en x e z SoMat eDAQ lite 12773 2 0 en 4 3 4 4 3 5 Starting a Test Run To start a test run select Start Run from the Test Control menu or toolbar The SoMat eDAQ lite supports multiple test runs for an initialized test Start a new test run anytime after a previous run stops or during
217. s with no drift Simulation Function Generator The function generator FG based simulation transducer provides capabilities similar to a conventional analog function generator i e a choice of various waveforms with frequency range and mean level control plus some extended capabilities Output Data Type The output data type is always 32 bit float Function Use the pick list to select the basic waveform shape of either sine triangle or square Note that the triangle and square waveforms start at the minimum signal level assuming the signal is not inverted and the sine waveform starts at the mean signal level For all waveforms the peak to peak limits are 1 0 prior to the application of the user defined scale and offset values Period Set the waveform period in terms of the number of samples The waveform frequency in Hz is defined as the sample rate divided by the period For example a period of 100 samples at a sample rate of 1000 results in a 10 Hz signal Duty Cycle Set duty cycle in percent for triangle and square waveforms modes only The default value of 50 produces symmetric waveform shapes Assuming the signal has not been inverted the duty cycle represents the percentage of time that the square waveform is in the low state or the percentage of time that the triangle waveform is in the ramp up state 12773 2 0 en x SoMat eDAQ lite 12773 2 0 en 6 7 3 Cycles Set the value used to define the numb
218. significantly increased demand on the eDAQ lite processor NOTE The diagnostic data options are provided primarily for HBM internal usage Check actual full scales Force TCE to check the actual full scale limits for all selected channels defined in the test Choose to check ELHLS or ELBRG channels TCE performs the check immediately after test initialization and reports if the over range protection meets the conditions below For more information on full scale values see Full Scale Values on page 96 Option Description Low Level Not applicable to the eDAQ lite High Level SS Warn if over range protection on ELHLS channels is less than 1 or greater than 25 Bridge Warn if over range protection on ELBRG channels is less than 1 or greater than 25 Enable min max tracking for Time History DataModes Track min and max values for each input channel in a Time History DataMode This option is not recommended for optimum throughput performance but it is required to support TCE auto range functionality For more information on auto range options see Auto Range Options on page 53 49 I D SoMat eDAQ lite 50 3 2 4 Use PC Card memory for remote RAM disk storage Store the static part of the RAM disk file on the PC Card This effectively limits the size of the RAM disk file and helps prevent a situation where the RAM disk memory fills up before the PC Card memory NOTE When this option is sele
219. size of the SIF component data files current on the PC Card Unused Indicates the unused memory on the PC Card available for data file storage SIF File limited to Indicates the maximum allowable size for the SIF file SIF File Built on PC Card If PC Card data storage is in use indicates that the SIF file has been consolidated and the PC Card can be removed from the eDAQ lite after powering down 4 5 Viewing Channel Displays TCE includes a variety of integrated run time displays to view real time data from input channels and computed channels during a test run TCE also offers a several signal display types to view transducer input signals when a test run is not in progress 68 12773 2 0 en x SoMat eDAQ lite 12773 2 0 en Ky Vy 7 IN mg N IS D 4 5 1 Pik Displays Overview Channel displays are available before initialization as a prerun option and as run time displays during a test run NOTE When applicable always define the excitation circuitry before displaying the transducer signal e Pre Initialization Before initialization TCE can display transducer channels before or after calibration The eDAQ lite uses the user defined sample rate and digital filtering The display types available before initialization are DVM scope plot and spectrum plot i e Freq Access all three types in the transducer setup window The DVM and scope plot displays are also accessible in the d
220. so uses the full scale estimates to set the default values for any histograms specified in the test setup DataModes Arithmetic Computed Channels Desk Calculator Desk Calculator computed channels generate data streams of either arithmetic floating point or logical Boolean results Input Channel All input channels to a single Desk Calculator channel must have the same sample rate which also determines the computed channel sample rate The required input data types for the Desk Calculator operator set are listed in table below NOTE The time functions e g _utc_day require an input from a Time Channel computed channel with a 32 bit float data type see Time Channel on page 136 Operator Input Type Output Type sin cos tan asin acos atan 32 bit float 32 bit float log log10 abs exp sgn round floor ceil float 8 bit unsigned 32 bit float gt gt lt lt 1 32 bit float 8 bit unsigned 1 amp amp 8 bit unsigned 8 bit unsigned time functions 32 bit float Time 32 bit float Channel Output Data Type The output data types for the Desk Calculator operator set are listed in the table above 12773 2 0 en SoMat eDAQ lite HBM Desk Calculator Expression Build the Desk Calculator expression using keyboard entry or by double clicking an input channel or operation to add it to the expression Syntax for
221. st run with all DataModes storage suppressed 4 3 3 Start Run CTRL 3 Start a test run 4 3 4 Prerun Options Access a variety of tasks after initialization 4 3 2 42 Transducer Checks Perform a variety of checks on transducer channels Rezero Display CTRL Z Display and re zero transducer channels for an initialized test Reference Shunt Checks Check the repeatability of shunt calibrations Install Shunts Install shunt calibration resistors during a test run Interactive Triggering CTRL 4 Open a dialog to control the values of the eight available interactive 4 3 5 triggers Run Time Display CTRL 5 Open the run time display window 4 5 Stop Run CTRL 6 Stop a test run 4 3 6 End Test CTRL E End the current test run 4 3 7 Auto Range Options Configure the option to automatically use the minimum and maximum 3 2 8 values recorded in the last test run as the full scale values in future test runs Upload Test Data CTRL 7 Transfer all or selected test runs stored in the eDAQ lite to a 4 6 user specified PC disk file Upload SIE Only Transfer SIE data files stored in the eDAQ lite to a user specified PC 4 6 1 disk file Upload SIF Only Transfer the SIF data file stored in the eDAQ lite to a user specified 4 6 2 PC disk file Upload Test Setup Transfer the test setup file stored in the eDAQ lite to a user specified PC disk file This option is not available when a
222. stain Select the enable sustain option to enable the sustain mode If not enabled the channel outputs TRUE for one sample before reverting to FALSE Sustain Period When using the sustain option specify the desired sustain period in seconds The maximum value for the sustain period is 4294967295 times the sample period 133 I D SoMat eDAQ lite 134 7 3 4 Sustain Conditional Mode Select one of two available sustain modes to conditionally set the output channel state based on the behavior of the input channel during the sustain period Sustain Mode Description Unconditional Set the output to TRUE for the duration of the sustain period regardless of the input channel behavior during the sustain period While true Set the output channel to TRUE only while the input channel is TRUE during the sustain period Note that if the input channel is FALSE when the sustain period begins the output value will not be set to TRUE effectively canceling the trigger At the end of the sustain period the output value is set to FALSE and the search for the next trigger start condition begins Triggered Zero Suppression The Triggered Zero Suppression channel generates output channels that zero suppress the input channel when a trigger condition is satisfied NOTE The Triggered Zero Suppression computed channel is designed primarily to provide a reset for quadrature decoder channel outputs when a triggering event occurs For mo
223. strip type paired inputs in the junction box NOTE DD Thermocouple leads should not exceed 30 meters in length from connector to tip The eDAQ lite uses the industry standard software compensation algorithm to generate the temperature data samples The eDAQ lite first measures the cold junction compensation CJC temperature and converts it to the equivalent microvolt value using a high resolution lookup table The eDAQ lite then subtracts the CJC equivalent microvolt value from the thermocouple s output microvolt value The temperature is found using another high resolution lookup table The lookups are based on the ITS 90 Thermocouple Direct and Inverse Polynomials For more information on setting up ELNTB input channels see Thermocouple on page 108 Application Note on Measuring Differential Temperatures To measure differential temperatures using the ELNTB layer select two or more adjacent channels on the same bank Use matched thermocouples for optimum differential accuracy Due to instrumentation noise it is recommended that the maximum sample rate e g 5 Hz for the 100 KHz MSR option and a Smoothing Filter computed channel be used for each input channel Using a five or seven tap Smoothing Filter typically reduces the instrumentation noise to below 0 2 C peak to peak for all thermocouple types Using more taps can further reduce the noise To generate the differential temperature use a simple Desk Calculator
224. t a New Test The remote power switch can be used to force a reboot with a test running effectively starting a new test run The remote power switch accomplishes this in a way that does not drain the backup battery since the main power supply is still on during the duration of the power down operations It is recommended to avoid other methods that turn off or disconnect the power supply as this drains the backup battery and can result in SIF data corruption 30 12773 2 0 en T o SoMat eDAQ lite 12773 2 0 en 2 3 4 Powering an eDAQ lite from a Vehicle The following sections illustrate the recommended power connections for using a vehicle electrical system as the eDAQ lite power source The included diagrams are not intended to be complete detailed instructions Please read the entire section on eDAQ lite power supply and backup battery considerations for a better understanding on the limits and implementation of both main and remote power to an eDAQ lite unit CAUTION Connection to the positive power terminal without proper grounding may result in a blown fuse and or other damage to the eDAQ lite NOTE When using additional cable length to make the connections select an appropriate gauge wire to carry sufficient current 10 amps and voltage 12 volts Non Switching Battery Ground The following diagram illustrates the proper method of powering an eDAQ lite with a direct connection to a vehicle battery that has a p
225. ta type is always 32 bit float File Name Specify the full path name of the desired ASCII input file Use the Browse button to select the desired file Use the Check File option to parse the ASCII file and verify that the format is valid NOTE Because TCE parses the ASCII file at test initialization any changes to the file prior to initialization are effective for subsequent test runs 111 I D SoMat eDAQ lite 112 6 7 2 Cycles Set the value used to define the number of continuous cycles i e passes through the file to output After the outputting the specified number of cycles the eDAQ lite repeatedly outputs the last data value in the file Scale Set the value used to scale the data values as defined in the file on a point by point basis Offset Set the value used to offset the data values as defined in the file on a point by point basis Decay Set the value used to adjust the scale value on a pass by pass basis The scale factor is multiplied by the decay factor on each successive pass which results in an exponential decay of the signal if the decay factor is a positive fraction Note that the default value of one results in a consistent signal from pass to pass with no decay Drift Set the value used to adjust the offset value on a pass by pass basis The drift factor is added to the offset value on each successive pass Note that the default value of zero results in a consistent signal from pass to pas
226. taMode see Burst History on page 148 can be very significant when a small number of burst points less than 100 is specified Also a large number of short test runs can significantly add to the overhead required Different DataModes and data type compression modes require different amounts of memory The eDAQ lite consumes raw data storage memory excluding overhead as detailed in the following table DataMode Data Type Memory Consumption Sequential 32 bit float 4 bytes per data point per channel 16 bit integer 2 bytes per data point per channel 8 bit integer 1 byte per data point per channel Histogram 32 bit unsigned 4 bytes per bin per channel NOTE The Rainflow DataMode see Rainflow on page 155 adds 4096 bytes of 32 bit float data per channel for the rainflow stack size Common DataMode Parameters ID Unique identifier for the channel This must conform to ID naming conventions Valid ID names e are case sensitive e are limited to a maximum of 12 characters 145 I SoMat eDAQ lite 146 e contain only valid characters i e letters a z A Z digits 0 9 and the underscore _ character e start with a letter e are not duplicates of system reserved names sin cos log etc Input Channel Select the input channel or channels to the DataMode The total number of input channels for any DataMode is limited to 256 Use multiple DataModes for more than 256 input channels All
227. tage bank Select either the nominal 5 volt or nominal 12 volt option as the power output for digital outputs Either voltage option can source up to one amp NOTE If a vehicle bus module is connected the eDAQ lite configures bank A with the 12 volt output power option NOTE The 12 volt option operates correctly only if the input power to the eDAQ is about 14 15 volts Otherwise the output is less than 12 volts GPS Clock Interface Select the GPS clock interface option to open another dialog window with the enable GPS clock generation option Select the GPS clock generation option to enable GPS based master sample rate clock generation Only one GPS based clock generation source can be defined in a test setup Define the network mode in the network setup window to either GPS master or GPS stand alone For more information on using GPS clock generation for wireless networking see Wireless Network on page 35 Enable Clock Generation Megadac Select the Megadac clock generation option to enable Megadac clock generation Only one Megadac clock generation source can be defined in the test setup Sync Delay Counts Megadac The sync delay counts parameter controls the time period that the clock generation is delayed relative to the time that the eDAQ lite turns on the source clock that drives data collection on both the eDAQ lite and the Megadac For a MSR of 100 kHz the eDAQ lite data collection start 1 00 seconds after
228. tangent of a asin asin a The arcsine of ain the range PI 2 PI 2 acos acos a The arccosine of ain the range 0 PI atan atan a The arctangent of ain the range PI 2 PI 2 12773 2 0 en 117 SoMat eDAQ lite HBM Category Operator Syntax Return Logical gt ab TRUE if ais greater than b else FALSE gt amp b TRUE if ais greater than or equal to b else FALSE lt a lt b TRUE if ais less than 5 else FALSE lt a lt b TRUE if ais less than or equal to 4 else FALSE a b TRUE if ais equal to amp else FALSE l a b TRUE if ais not equal to b else FALSE la TRUE if ais FALSE else FALSE amp amp a amp amp b TRUE if a and bare TRUE else FALSE allo TRUE if either aor bare TRUE else FALSE Time _utc_subsecond _utc_subsecond a The subsecond 0 1 in UTC input must be a Time Channel _utc_second _utc_second a The second 0 60 in UTC _utc_minute _utc_minute a The minute 0 59 in UTC _utc_hour _utc_hour a The hour 0 23 in UTC _utc_day _utc_day a The day 1 31 in UTC _utc_month _utc_month a The month 1 12 in UTC _utc_year _utc_year a The year in UTC _utc_day_week _utc_day_week a The day of the week 1 7 in UTC _utc_day_year _utc_day_year a The day of the year 1 366 in UTC _local_subsecond _local_subsecond a The subsecond 0 1 in local time _local_second _local_second a The second 0 60 in
229. ted Input Channels Each bus interface supports channels created from channel databases Each channel in the database has pre defined parameter values which are automatically transferred to the created channel The bus oriented input channels are 12773 2 0 en T o S SoMat eDAQ lite 12773 2 0 en l l7 a os 7 a In k 6 6 1 ZN EIN e Serial bus Add up to 128 serial bus channels to the serial bus connection on the base processor layer For more information on the serial bus input see Serial Bus on page 83 e GPS Add up to 128 GPS channels to an ELDIO GPS receiver For more information on the GPS receiver see EGPS 5HZ SoMat GPS Receiver on page 88 e Vehicle bus Add up to 254 vehicle bus channels to a vehicle bus module VBM compatible with an ELDIO layer For more information on VBMs see Vehicle Bus Module on page 89 Common Bus Channel Parameters NOTE All bus oriented input channels for any given connector must have the same sample rate NOTE The connector parameter has no physical significance but is a required parameter Enable Active Querying serial and vehicle bus only Specify whether or not to use active querying Desired Rate serial and vehicle bus only Set the query rate if active querying is in use The limit on the query rate is a function of multiple parameters including the type of bus and the amount of broadcast data making it ne
230. ternal Flash or DRAM and click Change Storage Device to change the storage media used for test data storage For more information on eDAQ lite data storage see Data Storage Options on page 34 Channels Tab The Channels tab provides information about the defined transducer message and computed channels in the most recently initialized test The information displayed for the transducer and message channels includes the unique ID the connector the transducer type the sample rate the calibration date and other information pertinent to the channel The information displayed for computed channels includes the network node associated with the channel the unique ID the prefix a description and other information pertinent to the channel Test Tab The test tab provides information about the current test including the name of the setup file the current or next run number and the elapsed run time Refresh the page to update the test information Test Status View a summary of test and eDAQ lite information including test run status RAM disk files RAM disk memory and PC Card memory View eDAQ Logbook View the log file maintained on the eDAQ lite unit This file contains information on significant eDAQ lite events e g resets test initializations etc and the values of pertinent eDAQ lite state variables It is available primarily for HBM internal development and field service troubleshooting Get TCE Setup File Transfer the test s
231. test is running Save AOM File Not applicable for the eDAQ lite 12773 2 0 en I BM SoMat eDAQ lite Menu Menu Option Description Section FCS Setup Set Master Sample Rate Specify the master sample rate MSR as either 100000 Hz the standard MSR for the eDAQ lite or 98304 Hz provided to support power of two sample rates Data sample and data storage rates must be integer divisors of the MSR The eDAQ lite stores the MSR in nonvolatile memory for access only after an eDAQ lite reset Therefore TCE initiates a programmed reset of the eDAQ lite unit when the parameter changes Set Reset Options Control options for initiating system resets The only applicable option is the no new run on FCS error reset option which prevents the eDAQ lite from attempting to start a new test run when a serious error forces a reset For normal operation do not select this option so that the eDAQ lite can attempt to salvage as much of the test run as possible This option is not available when the test is initialized Set Clock Set the real time clock on the eDAQ lite unit based on the current date and time setting on the host PC Reset Perform a programmed reset of the eDAQ lite unit Use this option only if absolutely necessary such as when the system is not responding Delete RAM Disk Files Delete all resident test and data files from the RAM disk Only use this option if there is no test initialized on
232. that this error can result from an operator mistake CardException The CardException flag indicates that a type Il layer has reported an error status to the eDAQ lite main processor As such it can have several meanings The eDAQ lite writes additional information to the log file when this occurs DeviceOverFlow The DeviceOverFlow flag indicates that the defined test exceeds the eDAQ lite unit s processing capabilities This may occur when many channels are taking data at very high sample rates or large numbers of computed channels are defined For a thorough discussion of this problem see Tips on Eliminating eDAQ lite OverFlow Errors Internal The Internal error flag indicates that a serious error condition exits on the eDAQ lite unit most likely resulting from a hardware failure or a software deficiency It is unlikely that this error can result from an operator mistake InvalidConnector The InvalidConnector error flag indicates that a serious error condition exits on the eDAQ lite unit most likely resulting from a hardware failure or a software deficiency It is unlikely that this error can result from an operator mistake Memory The Memory flag indicates that the eDAQ lite has run out of the memory reserved for eDAQ lite buffering and other processing tasks This may occur when many channels are taking data at very high sample rates or large numbers of computed channels are defined For a discussion on how to attempt to alleviate t
233. the trial test run used for auto ranging it may be desirable to use a smaller padding value e g 125 53 I D SoMat eDAQ lite 54 Keep Original FS Means kom Check this option to maintain the original full scale mean values This typically results in a loss of dynamic range but may be required for certain applications The range multiplier parameter is used as described above to ensure that sufficient padding is provided on both ends of the full scale definition Auto Set Select the auto set option to apply the defined auto range parameters to the selected set of channels TCE updates the list box This option can be used as often as necessary to assign different subsets of channels different auto range parameters Save TCE Setup Select this option to compute the new full scale settings and save them in a new TCE setup file TCE asks for the save file name and issues a report after saving the file The report lists the new full scale settings for each channel that has been auto ranged There are two situations where TCE overrides the user defined auto range settings 8 The hardware imposes limitations on most full scale settings For example signal conditioners that have voltage inputs are limited by the A D converter range TCE automatically imposes these restrictions on any auto ranged transducer channel 9 TCE limits auto range changes that magnify the original full scale range to be no more than a factor of 1000 Thi
234. the Desk Calculator expression is modeled after the standard C programming language and follows the same operator precedence rules All operators and referenced input channels are case sensitive Operand data type consistency is strictly enforced in the parsing of the Desk Calculator expression operators TCE warns of any syntax errors it detects after clicking OK Floating point exceptions can occur with the misuse of certain Desk Calculator operators such as taking the square root or logarithm of a negative number When detecting these exceptions the eDAQ lite sets the MathException status flag The results of such operations are usually some form of IEEE NAN not a number Category Operator Syntax Return Arithmetic abs abs a The absolute value of a sqrt sart a The square root of a log log a The natural logarithm of a log10 log10 a The base 10 logarithm of a exp exp d The exponential function of a sgn sgn a 1 for a lt 0 1 for a gt 0 and 0 for a 0 float float a ain floating point data type round round a The nearest integer to a floor floor a The largest integer less than a ceil ceil a The smallest integer greater than a A Db araised to the power of b i ab The product of aand b ii ab The quotient of aand b ab The modulus of a and b atb The sum of aand b ab The difference of a and b Trigonometric sin sin a The sine of a all angles in radians cos cos a The cosine of a tan tan a The
235. the MSR clock is turned back on to start a synchronized test run This 100 kHz clock is down sampled by ten to generate a 10000 Hz clock source for the Megadac interface board Therefore if the Megadac starts recording on the first clock pulse issued after switching to record mode the sync delay counts should be set at the default value of 10000 For a MSR of 98 304 kHz the eDAQ lite data collection starts 1 25 seconds after the MSR clock is turned back on to start a synchronized test run This 98 304 kHz clock is down sampled by 12 to generate a 8192 Hz clock source for the Megadac 87 SoMat eDAQ lite I D interface board Therefore if the Megadac starts recording on the first clock pulse issued after switching to record mode the sync delay counts should be set at the default value of 8192 ly NOTE N L a In general the Megadac does not appear to start data collection on the first clock pulse For accurate synchronization of eDAQ lite and Megadac data it is advised to experimentally determine the desired sync delay counts for the particular test configuration of interest Down Sample Factor Megadac Specify the factor by which the eDAQ lite down samples the MSR source clock to generate the desired Megadac sample rate The down sample factor can be any value in the range of 2 to 65535 5 3 EGPS 5HZ SoMat GPS Receiver The EGPS 5HZ is a commercial WAAS enabled GPS receiver with a fixed 5 Hz navigation
236. the break frequency in hertz for the selected digital filter For a Butterworth filter this is the approximate frequency at which the signal attenuation is 3 dB or 70 7 of the unfiltered signal voltage at that frequency For a linear phase filter the field is named the roll off start frequency and is the approximate frequency at which the signal starts to attenuate The eDAQ lite automatically selects a default break frequency value to ensure that no aliasing occurs The selection is based on the A D converter rate and the choice of digital filter type NOTE The check box field labeled data is protected from aliasing indicates whether the current digital filter selection ensures no aliasing TCE automatically updates the field when the digital filter configuration changes For example the 100 kHz sample rate option precludes aliasing because it is well over the Nyquist frequency of two times the 25 kHz analog guard filter However the 50 kHz sample rate option does not fully preclude against aliasing because the guard filter only attenuates about 30 of the 25 kHz input signal content 12773 2 0 en x e z SoMat eDAQ lite Ly gt lt S N ne A ne IS FUN SMART Module Use the SMART module section of the setup to configure a connected SMART module For more information on setting up a SMART module channel see SMART Module Input Channels on page 105 Voltage Divider
237. the product and trained according to their job x ey SoMat eDAQ lite 12773 2 0 en HBM SoMat eDAQ lite 1 Getting Started 12773 2 0 en k SN Pd 1 1 1 2 1 2 1 The SoMat eDAQ lite is a microprocessor based data acquisition system designed for portable data collection in a variety of test environments Overview The SoMat eDAQ lite is a sealed stand alone data acquisition system for testing in the harshest of environments It has leading edge signal conditioning and a capacity to perform a broad range of on board data processing Engineered to be rugged and mobile the eDAQ lite is tested to military standards at 10 g s from 55 to 2000 Hz Input power for the system operates in a wide range from 10 to 55 volts DC for the ELCPU PLUS processor or from 10 to 18 volts DC for the ELCPU processor Internal back up batteries protect the eDAQ lite from unplanned power losses or low voltage events Hundreds of synchronous channels are possible in a single system with virtually limitless channel counts when networking multiple systems using Ethernet communications eDAQ lite Layers The eDAQ lite consists of one base processor layer and a number of optional add on layers The following table lists the available layers including the base processor Name Order Number Description ELCPU 1 ELCPU 2 1 ELCPU PLUS 2 eDAQ lite Base Processor with Extended Voltage ELHLS 1 ELHLS 2 eDAQ lite Base
238. the residual peak valley sequence is processed through the rainflow cycle counter to account for the additional accumulated fatigue damage The output values are effectively scaled based on the user selected damage units option NOTE l N L a The use of the scaling options does not result in any processing overhead because of e the way that these parameters are integrated into the fatigue damage solvers For more information on the data processing algorithms used see Data Processing Algorithms on page 203 Input Channel The input channel data type must be 32 bit float Output Data Type The output channel data type is 32 bit float Scale Factor Specify the desired scaling factor typically used to convert the input channel data into the proper units based on the damage model For example the scale factor converts input channel data in microstrain units to dimensionless strain units when using the strain life damage model 128 12773 2 0 en I e z SoMat eDAQ lite 12773 2 0 en Sum Damage Only When TRUE Select the sum damage only when TRUE option to filter out input data samples that are not to be used in the fatigue damage accumulation processing Trigger Channel Specify the trigger channel used in the sum on trigger feature The trigger channel can be any logical channel that has the same sample rate as the input channel Accumulate Across Test Runs The accumulate across test runs option is not c
239. the transducer in signal units e g volts This is the only option available for uncalibrated transducers Engineering Display the transducer in engineering units e g microstrain This is the default option for calibrated transducers Quit Off Select Quit run time or Off pre init and prerun to exit the display DVM The DVM digital voltmeter display samples and displays up to 16 or 256 transducer signals in a digital format The DVM is available pre initialization and as a prerun option TCE presents the DVM display window differently for a single channel and a group of channels DYM Display lolev_1 a Volts Ss Units View Mode Coir y Eng Scan Amel z C Volts Hold Opts GER D g T 471 13 6 millivolts Figure 4 2 A TCE DVM signal display for a single channel 71 I SoMat eDAQ lite Group Transducer D M Display x Connector 1D Channel ID Current Value Saturation Bounds Unite 191680 Hilev_l cOl hiev_1 732 10733 10733 mlivois 192 1680 Lolev_1 c01 lolev_1 51 2 10573 10590 millivolts Figure 4 3 A TCE DVM signal display for a group of channels Rate Adjust the rate scroll bar to change the rate at which TCE updates the display NOTE A DVM for a single digital input channel offers the option to read bits When using this option the eDAQ lite reads the current state of the digital input line and TCE displays a check when
240. ther reason to believe that the SIF data file is corrupt after using the TCE SIC consolidate task proceed as follows For internal Flash memory the only way to copy the eDAQ lite resident SIC files is to use the eDAQ lite web browser Select the Explore eDAQ Files option in the system tab and copy the SIC files under the hd eDAQ folder to the PC Note that this can be very time consuming if there are a large number of SIC files Tips on Eliminating eDAQ lite OverFlow Errors The eDAQ lite generates a DeviceOverFlow or QueueOverFlow error when the defined test exceeds the eDAQ lite unit s processing capabilities Following are some suggestions for test setup changes to avoid a DeviceOverFlow or QueueOverFlow error Use integer data types for transducers Significant improvement in processing throughput can be achieved by using integer output data types instead of the floating point data type in the transducer channel definitions 16 bit integer data requires only half the storage space as 32 bit floating point data The main drawback with integer data types is that they are not supported by all computed channels and DataModes There is no loss of accuracy when using the 16 bit integer data type for any of the data sources that originate from eDAQ lite A D converters since these are all 16 bit A D converters Use Engineering Scaler computed channels If transducer channels that originate as 16 bit integer data types e g ELHLS and ELBRG cha
241. third field is the filter gain This field is optional in the sense that TCE does not use it directly However it does provide a check If the gain value is not 0 0 then TCE checks the gain value against the sum of the tap coefficients and reports any significant conflict e The remaining fields are the ordered array of tap coefficients Numerous examples are available in the TCE installation kit See the files in the hsfilter and sfilter subdirectories under the main TCE install directory Digital Filter Processing Notes e Inthe steady state the taps coefficients are multiplied by the input data sample values and these products are summed to form a single filtered data output value This process is obviously computationally intensive if there are a large number of taps e Ifthe filter delay is greater than zero which is typically the case the first output samples cannot be fully filtered The eDAQ lite backfills these first output samples using the first fully filtered data value For example if the delay is nine the first nine output samples are assigned the same value as the tenth output sample value Input Channel The input channel data type must be 32 bit float 12773 2 0 en 139 I SoMat eDAQ lite 140 7 5 7 5 1 Output Data Type The output channel data type is 32 bit float File Specify the full path name of the ASCII file that defines the filter Use the browse button to select the desired file Use the ch
242. to the original channel Edit Original the ID names in the next window such that there are no duplicates Numeric Increment Create the copies with an increasing numeric suffix in the ID name If Suffix desired edit the ID names in the next window Modifying Channels and DataModes To modify the parameters of an existing channel or DataMode highlight the desired definitions and select Edit or double click the definition entry For computed channels and DataModes TCE limits the edit operation to one definition at a time For transducers TCE allows group edits for a set of channels of the same type After selecting edit choose which set of parameters to modify The available parameters vary depending on the type of channel Deleting Channels and DataModes Delete a single definition or a set of definitions by simply highlighting the desired channels or DataModes and selecting Del Note that any computed channel or DataMode that uses a deleted channel as an input remains listed but is no longer a valid definition Using Existing Setup Definitions TCE provides several methods for using the setup information from existing setup and data files These include simply opening and modifying a previously saved test setup extracting setup and supporting files from a SIE or SIF data file and importing defined network nodes Modifying an Existing Test Opening and modifying an existing test setup file is probably the most common mode of defin
243. ttery systems only NOTE The eDAQ lite fuses are 10 amp 42 volt rated automotive mini blade fuses For the eDAQ lite carefully remove the base plate to access to the fuses Minimum Input Voltage The eDAQ lite requires a minimum of ten volts for boot up and a minimum of nine volts for continuous operation once booted After boot up the eDAQ lite continues to operate for a limited time at an input voltage down to six volts When the input power voltage drops below nine volts which occurs during normal vehicle engine cranking the eDAQ lite switches in the internal backup battery as the power source Power continues to source from the internal battery until the input voltage returns to ten volts or more If the input voltage drops below six volts or the eDAQ lite detects that the internal battery has limited remaining life the eDAQ lite performs an orderly power shut down When input power voltage is restored to ten volts or more the eDAQ lite reboots and continues operation A fully charged internal backup battery contains enough reserve capacity to power an eDAQ lite stack drawing 50 watts in this mode of operation for more than one minute NOTE The above voltages are at the eDAQ lite power connector which are always less than the voltages at the power source because of some voltage drop in the wires used to route the power supply voltage to and through the eDAQ lite power connector These voltage losses are dependent on the length and gau
244. tup window provides an option to import previously defined network node from a saved TCE setup file into the existing setup Select Import in the network setup window to begin the import process Importing a network node extracts all the information associated with the node including hardware transducer and computed channels and DataModes TCE does not import any channels or DataModes with ID names identical to existing channels or DataModes in the defined test If this situation occurs delete the newly imported node rename the duplicate IDs in the existing setup or in the setup containing the network node and import the node again Extracting a Setup from a Data File To extract a TCE setup file from a SIE or SIF data file select Open SIE or SIF File from the File menu After choosing the desired data file select Keyword Extraction Options and then TCE Setup File to PC File Save the file and open it in TCE as any other previously saved setup file Calibrating Input Channels Transducer calibration for the eDAQ lite system is independent of a specific signal conditioner or hardware layer The transducer calibration definition is solely in terms of the relationship between the transducer output signal i e voltage for most transducer types and the selected engineering units Note that this relationship is dependent on the excitation settings the use of an excitation signal and the bridge settings for applicable types of transducer channels
245. two connector cables ending in 1 SAC EPWR15 2 pigtails SoMat TCE Installation CD CD containing the installation files for TCE 1 2 2 Support Equipment In addition to the eDAQ lite base processor add on layers and included cables set up of the eDAQ lite system requires an adequate power supply a support PC and any transducers or sensors needed for testing Power Supply The eDAQ lite is designed to always be connected to an adequate power supply for the duration of all test runs An example of an adequate power supply is a charged nominal 12 volt vehicle battery system that reliably supplies around 13 5 volts The ELCPU PLUS processor supports nominal 12 24 and 42 volt vehicle battery systems The ELCPU processor supports nominal 12 volt vehicle battery systems only HBM also offers an optional SoMat AC Power Supply 1 E AC 2 or 1 E AC 18 2 and the SoMat ELBAT eDAQ lite Battery Layer 1 ELBAT 2 2 For more information on eDAQ lite power see Power Considerations on page 28 Support PC A support PC is necessary to run TCE The PC must meet these minimum requirements for TCE to operate correctly e Microsoft Windows 95 98 NT 2000 XP e 40 MB of available hard disk space e CD ROM drive or Internet access required for updating and installing software e 16 MB of RAM 32 MB recommended e Mouse or other pointing device e An Ethernet card Sensors The eDAQ lite supports a wide variety of sensors for data acquisition including several offe
246. type option Then define a Desk Calculator computed channel see Desk Calculator on page 116 with an expression such as ElapsedTime gt 600 where ElapsedTime is the ID of the Time Channel and 600 seconds is the desired test run duration To limit the data stored in any DataMode to the exact test run duration specified use the gate triggering options using the Desk Calculator computed channel defined above as the trigger channel 7 4 Time Sample Rate and Filter Computed Channels 7 4 1 136 Time Channel The Time Channel provides a time base channel for use with other computed channels or for storage in the Time History see Time History on page 147 and Peak Valley Slice see Peak Valley Slice on page 152 DataModes For each data sample in the selected input channel the channel outputs the corresponding elapsed time in seconds since the start of the test run The first sample is at time equal to zero seconds Input Channel The input channel can be any data type Output Data Type Select an output data type of 32 bit float or 32 bit unsigned NOTE Time channels are unique in that the selected data type determines the data type used in the DataModes 12773 2 0 en I e z SoMat eDAQ lite 12773 2 0 en l me 7 4 2 7 4 3 Use 64 bit Float for Sum Select the 64 bit float for sum option to minimize the limited precision error that results from using the 32 bit float data type This
247. ucer Cable for J1708 LIN BUS Interface 183 12 5 3 Transducer Cable for CAN SWC Interface 183 12 5 4 Transducer Cable for ISO9141 KW2000 Interface 184 10 12773 2 0 en HBM SoMat eDAQ lite 13 Device Wiring 185 13 1 ELDIO Digital I O Layer 185 13 1 1 Digital Input 185 13 1 2 Digital Output 185 13 2 ELHLS High Level Analog Layer 186 13 2 1 Analog Input 186 13 2 2 SMSTRB4 Strain SMART Module 187 13 3 ELBRG Bridge Layer 188 13 3 1 Bridge Transducers 188 13 3 2 Analog Input 189 14 Data Synchronization 191 14 1 Data Synchronization Characterization Method 191 14 2 Analog Channel Synchronization 191 14 2 1 ELHLS and ELBRG Channel Synchronization 192 14 3 Digital Channel Synchronization 193 14 4 Resampled Channel Synchronization 193 14 4 1 Bus Oriented Channel Synchronization 194 14 4 2 Thermocouple Channel Synchronization 194 14 5 Networked eDAQ lite eDAQ System Synchronization 194 14 5 1 Hardwired Network Synchronization 194 14 5 2 Wireless Network Synchronization 194 15 Digital Filtering 195 15 1 Signal Aliasing 195 15 2 Digital Filter Characteristics 195 15 2 1 ELHLS and ELBRG Digital Filters 196 12773 2 0 en 11 SoMat eDAQ lite HBM 16 Xth Percentile Benchmark Tests 201 17 Data Processing Algorithms 203 17 1 Peak Valley Processing Algorithm 203 17 2 Rainflow Cycle Counting Algorithm 203 18 Cable Resistances 205 19 CE Com
248. uence through the rainflow cycle counter to account for the additional accumulated load damage and accumulated closed cycle counts The Damage Equivalent Load output value Seq is computed using the following equation 1 L m Seq N 5 Ti where x is the load damage for each closed cycle Nis the number of closed cycles and mis the damage slope For more information on the data processing algorithms used see Data Processing Algorithms on page 203 Input Channel The input channel data type must be 32 bit float Output Data Type Both output channel data types are 32 bit float Hysteresis Set the desired hysteresis level for the peak valley processing algorithm Damage Slope Set the damage slope used in the processing algorithm as described above This can be any value from 1 0 to 20 0 Window Samples Specify the number of input samples used to generate one output sample This sets the analysis window size and associated output sample rate Specify any positive integer value greater than one NOTE There can be fairly significant computational overhead in generating each output sample particularly when the residual peak valley sequence is relatively long i e 100 residual peak valleys or more Consider the computational overhead when specifying the window samples 127 SoMat eDAQ lite I Application Note Load Life Fatigue Damage If the input channel is a linear function of load the outputs of thi
249. ues for the transducer When storing a 32 bit float in a DataMode that uses an integer data type the eDAQ lite uses the full scale limits when converting from the floating point format to the integer format The eDAQ lite also uses the full scale estimates to set the default bin boundaries for histogram DataModes and to set the scales for run time displays Input channels on layers that have programmable gain and offset capabilities use the full scale values in conjunction with the calibration parameters to determine the gain and offset values The eDAQ lite provides some over range protection of 1 on ELHLS and ELBRG channels For example specifying full scale values of 2000 microstrain on an ELHLS channel causes the eDAQ lite to set up the gain and offset circuitry as close as possible to 2020 microstrain without going under Output Data Type Output Data Type Depending on the channel type the eDAQ lite provides several data type options When choosing the data type consider factors such as data resolution mass storage consumption and what computed channels or DataModes use the channel as an input For a summary of the compatible data types for all computed channels and DataModes see Data Types on page 175 NOTE The Engineering Scaler computed channel generates a 32 bit floating point output data stream from an integer type input channel This permits storing data in an integer format to minimize data storage consumption while stil
250. ugh the use of system commands Therefore use extreme caution should when entering shell commands Reset eDAQ Perform a programmed reset of the eDAQ lite unit Use this option only if necessary such as when the system is not responding Hardware Tab The Hardware tab contains information about the hardware contained in the eDAQ lite stack including the network node associated with the hardware the type of layer and its serial number the version number of the code contained in the flash memory and information about the PC Card if installed 161 I D SoMat eDAQ lite 9 3 1 162 System Hardware Channels Test Data Custom Help Node ZA bested 244 Schad Corporation Figure 9 3 Hardware tab of the eDAQ lite web interface Hardware Table Node The node column indicates the associated network node by its IP address Connector The connector column indicates the layer identifier prefix used in hardware connector IDs Card Type The card type column shows each layer type Certain eDAQ lite layers allow for additional configuration such as enabling message logging and editing of parameter databases When this additional configuration is available the card type listed is enabled as a hyperlink and when selected opens additional pages for configuration options The additional configuration available for the vehicle bus layer includes editing parameter databases importing a vector CANdb database lo
251. ully isolated Thermocouple thermocouples of type J K T or E over SMART Module the full temperature range of the thermocouple For more information on setting up SMART module input channels see SMART Module Input Channels on page 105 For information on wiring SMSTRB4 inputs see SMSTRB4 Strain SMART Module on page 187 Installation The eDAQ lite does not sense when a SMART module is installed or removed After connecting a module either cycle the eDAQ lite power or perform a hardware query to detect the installed SMART module In both of these cases the eDAQ lite applies power and sends a query to all ELHLS channels that support SMART modules Note that the SMART modules remain in a default configuration until an action such as starting a DVM display performing a calibration or initializing a test This also means that a configured SMART Module that is removed and reinstalled reverts to an unconfigured state until one of these same actions Flash Memory All SMART modules have three logical segments of flash memory Two are reserved for factory use one to store the microprocessor execution code and the other to store serial number and factory calibration parameters The third area is the user data segment broken into two logical partitions 1 The first partition holds TCE parameters that can completely configure the TCE transducer channel setup when the SMART module is installed If no information exists in this part
252. uration Options on page 86 Configuring the Hardware Use the hardware setup window to view and configure all hardware layers and modules installed on the defined network nodes Select Query in the hardware setup window to obtain entries for the installed hardware If the queried configuration differs from the current hardware setup choose to update the list or abort the query when prompted TCE also issues an alert for any flags set by the eDAQ lite since the last query 12773 2 0 en T o SoMat eDAQ lite 12773 2 0 en IL ne IS Re Double click an entry or select Config to open the hardware configuration options Several of the hardware layers and modules offer user configurable settings while others only show characterization details For information on specific configuration settings available for each layer or module see eDAQ lite Hardware on page 83 NOTE The thermocouple layer ELNTB and the power controller do not offer any configuration options Hardware with user configurable settings e ELCPU e Serial Bus ELCPU e ELDIO e Vehicle Bus ELDIO e GPS ELDIO NOTE Serial bus configuration settings are only available when a custom module is installed using the web interface For detailed instructions on installing several different custom modules see the installation instructions provided with the firmware installation Hardware with viewable characterization details only e ELBRG e EL
253. ure 9 4 Data tab of the eDAQ lite web interface SIE Test Data The SIE test data table shows all the SIE data files present on the eDAQ lite The table shows the name of each file the date it was modified and options to view transfer initialize and delete the file In the get column click SIE File to upload the complete SIE file or Extract SIE Channels to upload only select channel data In the operate column select Reinitialize to initialize the eDAQ lite with the TCE setup file contained in the SIE file or Delete to remove the SIE file from the eDAQ lite Click on Test Runs in the view column to view the test data as a set of test runs with their start and stop times elapsed time and test description Click an individual test run to open a table of the channels in the test run Click All Channels in the view column to display all of the channels in the data file with their descriptions DatMode types sample rates and output samples When viewing a table of channels click on Plot in the plot column to view a simple plot of the channel data as a function of time Click the name of the channel in the name column to view basic channel information and the actual data collected during the test run SIF Test Data Use the get SIF file option to transfer the SIF data file from the eDAQ lite to the PC The table lists the completed test runs with the date and time of the run Clicking on the test run opens a table of channels that displays the ru
254. ure decoder channels the eDAQ lite resets the internal counter value to zero before performing a zero adjust Delete Calibration Delete the calibration to clear the calibration date field and modify calibration related parameters before recalibrating the channel Shunt Calibration Loop Not applicable to the eDAQ lite 63 I SoMat eDAQ lite 64 4 2 3 4 3 Calibration Specifications ELHLS and ELBRG Channels To measure calibration signal voltages for ELHLS and ELBRG channels the eDAQ lite down samples the A D converter subsystem by a factor of 1000 or 960 depending on the MSR to 100 or 102 4 respectively using a Butterwoth 8 pole digital filter with a 15 Hz break frequency The eDAQ lite manipulates the signal conditioner gains and offsets in an auto ranging mode to yield near maximum resolution of the input signal i e the eDAQ lite sets the gains as high as possible The eDAQ lite acquires one A D sample to determine the signal voltage of the input channel High Level Channels For most high level input channels i e pulse counter vehicle bus serial bus and GPS input channels the eDAQ lite acquires a set of data samples at the user specified sample rate and averages these to provide a single signal value for calibration purposes If the sample rate is 50 Hz or more the eDAQ lite uses 100 data samples Otherwise the uses a number of data samples equal to twice the sample rate down to the minimum of one data
255. urrently supported Damage Model Select one of three available damage models The following table defines each model in terms of a log40 1094 linear relationship 129 SoMat eDAQ lite I D Model Description Load Life The load life relationship is defined by P P N where Mis cycles to failure Pis the applied load range and P and b are respectively the user defined intercept and slope of the 10940 10949 function For each rainflow cycle the damage 1 W computed from the load range P is added to the cumulative damage sum Stress Life The stress life relationship is defined by S SN where Mis cycles to failure Sis the applied stress range and S and bare respectively the user defined intercept and slope of the l0g 0 l0g 0 function For each rainflow cycle the damage 1 N computed from the stress range S is added to the cumulative damage sum Strain Life The strain life relationship is defined by er S r EY2N where 2W is reversals to failure eyis elastic strain amplitude and SE and bare respectively the user defined intercept and slope of the l0g 0 l0g 0 function ep es 2N where e is plastic strain amplitude and e and care respectively the user defined intercept and slope of the log 6 log function and e i p where eis the total strain amplitude For each rainflow cycle the damage per cycle 2 2N computed from the stress range 2e is added to the cumu
256. ut 8 bit unsigned logic Simultaneous High Level 16 bit signed 32 bit float 8 bit signed Pulse Counter 32 bit float 32 bit unsigned 32 bit integer limited by selected mode Simulation File 32 bit float Simulation Function Generator 32 bit float Simulation Message 8 bit unsigned msg Thermocouple 32 bit float 175 SoMat eDAQ lite HBM Category Channel Type Input Data Type Output Data Type Computed Channel Anomaly Detect 32 bit float 8 bit unsigned bmp 176 Bitmap Trigger 8 bit unsigned bmp 8 bit unsigned logic Damage Equivalent Load 32 bit float 32 bit float Desk Calculator Based on specific operators below sin cos tan 32 bit float 32 bit float asin acos atan log log10 abs exp sgn round floor ceil HN float 8 bit unsigned logic 32 bit float gt gt lt lt 32 bit float 8 bit unsigned logic 1 amp amp 8 bit unsigned logic 8 bit unsigned logic Directional Velocity velocity 32 bit float 32 bit float direction 32 bit float 32 bit integer Down Sampler all same is input Engineering Scaler 8 bit integer 32 bit float 8 bit unsigned 16 bit integer 16 bit unsigned 32 bit integer 32 bit unsigned Fatigue Damage 32 bit float 32 bit float Integer Scaler 32 bit float 8 bit integer 8 bit unsigned 16 bit integer 16 bit unsigned 32 bit integer 32 bit unsigned Integrator 32 bit float same as input 32
257. value for the Xth percentile mode The value can be an integer between 0 and 100 NOTE Setting the Xth percentile parameter to zero returns the minimum value in the analysis window Setting the Xth percentile parameter to 100 returns the maximum value in the analysis window Window Samples Specify the number of input samples used to generate one output sample This sets the analysis window size and associated output sample rate Specify any positive integer value greater than one 12773 2 0 en T o SoMat eDAQ lite 12773 2 0 en IL 7 et ne ak lt Pn 7 2 9 Damage Equivalent Load The Damage Equivalent Load channel generates an accumulated equivalent load range value as a function of the user defined damage slope parameter and the associated accumulated rainflow cycle count for the selected input channel NOTE The Damage Equivalent Load channel has two outputs load and cycle each of which has its own name description type units full scale min and max and data type fields The eDAQ lite processes the input channel through a rainflow cycle counter using the user defined hysteresis value for peak picking For each closed cycle the eDAQ lite computes a load damage parameter as closed cycle range damage slope and adds it to the running sum that accumulates load damage on a cycle by cycle basis For each output sample the eDAQ lite processes the residual peak valley seq
258. with the Integrator computed channel to measure accumulated pulse counts or other parameters that are directly proportional to accumulated pulse counts such as distance traveled revolutions etc The eDAQ lite can accumulate over 4 billion counts in each sample period however the maximum pulse rate is limited to approximately 1 0 MHz Pulse On Time Period Output the time period in microseconds that the pulse is at logic 1 The unsigned 32 bit counter can measure pulse on time widths from 200 nanoseconds to approximately 850 seconds Use a Desk Calculator computed channel see Desk Calculator on page 116 to compute duty cycle as the pulse on time period divided by the pulse time period Quadrature Decoder Output the encoder position in terms of the accumulated encoder counts The signed 32 bit counter can accumulate over 2 billion counts in either direction before the counter rolls over Pulse Frequency Mode Notes Consider the following when using a pulse counter in frequency mode Because the ELDIO uses a 32 bit counter it has an effective working range in this mode of less than 0 002 Hz The accuracy of the frequency measurement is inversely proportional to the measured frequency For example at a frequency of 50 kHz 100 counts are accumulated in the counter resulting in a 1 0 measurement accuracy at a frequency of 5 kHz 1000 counts are accumulated in the counter resulting in a 0 1 measurement accuracy When the i
259. yer Configure one of the two pulse trains from the quadrature encoder as a pulse frequency transducer channel to yield the unsigned velocity input channel Define a normal quadrature decoder Pulse Counter channel using both pulse trains to yield the position input channel For more information on quadrature encoder inputs see Pulse Counter on page 99 7 2 7 State Mapper The State Mapper channel maps the input channel into a discrete state output channel based on a set mapping conditions defined in an ASCII file Define each mapping condition in terms of a minimum input value a maximum output value and the associated output state value The number of mapping conditions must be 32 or less The ASCII file should be a line based file with the three ordered entries per line separated by spaces or tabs Vly NOTE f The State Mapper channel can consume significant eDAQ lite computational Br e a resources depending on the sample rate and the number of mapping conditions defined State Mapper Example Angular Position Consider mapping an input channel that generates angular position in the range of 0 to 360 degrees into an output channel that specifies which 60 degree sector the input channel is in Use the following mapping conditions where xis the input and yis the output 1 O lt r lt 60 2 60 lt r lt 120 3 120 lt r lt 180 Y 4 180 lt r lt 240 5 240 lt r lt 300 6 300 lt r lt 360 One way to write the ASCI

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