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DT9837 Series User`s Manual

1. Feature DT9837 DT9837A DT9837B DT9837C Connectors BNC BNC BNC BNC on the DT9837C BNC or Mini XLR on the DT9837C XLR Maximum A D Throughput 52 734 kHz 52 734 kHz 105 469 kHz 105 469 kHz Low Pass Filter 0 5 Hz 0 1 Hz 0 5 Hz 1 Hz Current Source 4mA 4mA 4mA 2mA A D Threshold Trigger Fixed Programmable Programmable Programmable Number of Tachometer Counters 1 2 C T O and 1 2 C T 0 and 1 0 Number of Gate Inputs 0 15 C T 2 1 C T 2 0 Number of Analog Output 1 1 0 1 Channels Analog Output Readback No Yes No No Capability Maximum Analog Output 46 875 kHz 52 734 kHz 96 kHz Throughput fixed Analog Output Voltage 10 V Q 1 mA 10V 3 mA 3 V 2 mA Analog Output Trigger Types Software trigger Software trigger None Software trigger only external digital trigger external digital trigger RJ45 Synchronization Connector No Yes Yes Yes a For the start trigger on the DT9837 the threshold channel is channel 0 and the threshold level is fixed at 1 0 V For the start trigger on the DT9837A and DT9837B the threshold channel is channel 0 and the analog threshold level is programmable from 0 2 V to 9 8 V with 0 1 V of hysteresis For the start trigger on the DT9837C the threshold channel can be any of the analog input channels and the threshold level is programmable between 10 V for a gain of 1 and 1 V for a gain of 10 For the reference trigger on all modules the threshold channel can be any of t
2. Note The DT9837A and DT9837 C modules have an input FIFO of 2 kBytes the DT9837B has an input FIFO of 4 kBtyes and the DT9837 does not use an input FIFO Error Conditions DT9837 Series modules report any overrun errors by sending an overrun event to the application program This event indicates that data buffers are not being sent from the module Principles of Operation to the host fast enough and the A D converter ran out of buffers To avoid this error try one or more of the following Reduce the clock rate of the A D Increase the size of the buffers Increase the number of buffers Close any other applications that are running Run the program on a faster computer If one of these error conditions occurs the module stops acquiring and transferring data to the host computer 67 Chapter 5 Analog Output Features This section describes the following features of analog output operations Analog output channels described below e Output ranges and gains described below Output resolution described on page 68 Output conversion mode described on page 69 e Output clocks described on page 68 Output triggers described on page 72 Data format and transfer described on page 72 Error conditions described on page 73 Analog Output Channels The DT9837 DT9837A and DT9837C modules support one analog output channel through analog output subsystem 0 Note that on the DT9837A module you can read bac
3. Table 20 Troubleshooting Problems cont Symptom Possible Cause Possible Solution Device failure error reported The DT9837 Series module cannot communicate with the Microsoft bus driver or a problem with the bus driver exists Check your cabling and wiring and tighten any loose connections see the instructions in Chapter 3 The DT9837 Series module was removed while an operation was being performed Ensure that your module is properly connected see the instructions in Chapter 2 Data appears to An open connection exists Check your wiring and fix any open be invalid connections see the instructions in Chapter 3 A transducer is not connected to the Check the transducer connections see the channel being read instructions in Chapter 3 The module is set up for differential inputs Check your wiring and ensure that what you while the transducers are wired as specify in software matches your hardware single ended inputs or vice versa configuration see the instructions in Chapter 3 The module is out of calibration DT9837 Series modules are calibrated at the factory If you want to readjust the calibration of the analog input or analog output circuitry refer to Chapter 8 USB 2 0 is not Your operating system does not have the Ensure that you load the appropriate Windows recognized appropriate Service Pack installed Service Pack version 2 for Windows XP If you are unsure of
4. 00 0 cece nent n 63 Input THe gers 455 lvi Se BR Role tig xeu he eI MES oS DP rap qr epe 65 Start This set SOULCES i osse tea ERREUR ihe rano dd RU rd 65 Reference Trigger Sources sssssssssssss ee 66 Data Formatand Tangier iu DESDE ew e E EN Roe ep ES 66 Error Conditions ee A eig ale ate ee ele d rmt us tte edet as 66 Analog Output Features c ccs Rer Ret eR ve Ae RR E RETE 68 Analog Output Channels ever E e Re il eoe eda de ae 68 Output Ranges and Gains een 68 Output Resolution cust ere a trat Cage ent te ie tice el wits ute tton a Sit e 68 Output Clocks eee Deoa Pet dene Pa aeter acere os e eec ie s e s 68 Output Conversion Modes ssssssssssessseee ees 69 Single Val e Mode sebo A NASA VUE VUES 69 Waveform Generation Mode 00 0 ee eee eect ee 69 Continuous Analog Output Operations 0 000 70 Reading the Analog Output Value in the Analog Input Data Stream DI9837A Only uec sere t ede ete eme gd tx ea ot ques a 7i Output rIP ger os cde eO Mo e E la Iu dus err Posee D tees 72 Data Format and Transfer na ae TY R anp Ra RT een ee 72 Error Conditions semie nina reeks RLE RA AER ERU A Edda E E RN 9 73 Tachometer Input Features enai eaa TR aH enn 74 Frequency or Period Measurements Tachometer Counter 0 00040 74 Phase Measurements Tachometer Counter L 76 Gatednput Eeat res sooo Uso t do LL 77 Triggering Acquisition on Multiple Modules
5. 115 dB typical 115 dB typical O V signal 115 dB typical 118 dB typical 118 dB typical 118 dB typical Data encoding Offset binary Offset binary Offset binary Offset binary Maximum input voltage without damage Power on 30 V 40 V 40 V 40 V Power off 20 V 40 V 40 V 40 V 110 Specifications Table 21 Analog Input Subsystem Specifications cont Clock on input A D Done 42 ns to 83 ns DT9837 DT9837A DT9837B DT9837C Feature Specifications Specifications Specifications Specifications Input impedance 1 MQ 20 pF 1 MQ 20 pF 1 MQ 20 pF 1 MQ 20 pF Overvoltage protection 40 V 40 V 40 V 40 V power on off ESD protection Arc 8 kV 8 kV 8kV 8kV Contact 4 kV 4kV 4 kV 4 kV Current source 4 mA 4 mA 4 mA 2 mA Compliance voltage 18V 18V 18V 18V Current noise 1 kHz 5 nA rms 5 nA rms 5 nA rms 5 nA rms bandwidth Current source accuracy 1 0 1 0 1 0 1 0 DC offset 1 5 mV 1 5 mV 1 5 mV 1 5 mV AC coupling at 3 dB 0 5 Hz 0 1Hz 0 5 Hz 1 Hz D A Readback in A D Stream A D resolution 16 bits gt Zero error 15 mV Full scale error 0 2 a The conversion rate Sample rate 512 b Cable capacitance of typically 30 pF per foot must be added 111 Appendix A Analog Output Specifications Table 22 lists the specifications for the analog output subsystem on the DT9837 DT9837A and DT9837
6. Table 10 Range Options DT9837 Series Modules A D D A DIN DOUT C T TACH QUAD Number of Voltage Ranges NumberOfRanges 1 1 0 0 0 0 Available Ranges SupportedVoltageRanges 10 VP 10 V or 3 V Current Output Support SupportsCurrentOutput a The D A subsystem is not supported by the DT9837B module b By applying a gain of 1 the effective input range is 10 V By applying a gain of 10 the effective input range is 1 V c The DT9837and DT9837 support an output voltage range of 10 V the DT9837C supports an output voltage range of 3 V Resolution Table 11 Resolution Options DT9837 Series Modules A D D A DIN DOUT C T TACH QUAD Software Programmable Resolution SupportsSoftwareResolution Number of Resolutions NumberOfResolutions 1 1 0 0 0 0 Available Resolutions SupportedResolutions 24 24 0 0 0 0 a The D A subsystem is not supported by the DT9837B module 88 Supported Device Driver Capabilities Thermocouple and RTD Support Table 12 Thermocouple and RTD Support Options DT9837 Series A D D A DIN DOUT C T TACH QUAD Thermocouple Support SupportsThernocouple RTD Support SupportsRTD Resistance Support ReturnsOhms Voltage Converted to Temperature in Hardware SupportsTemperatureDatalnStream Supported Thermocouple Types ThermocoupleType Supported RTD Types RTDType S
7. This equipment has been tested and found to comply with CISPR EN55022 Class A and EN61000 6 1 requirements and also with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense Changes or modifications to this equipment not expressly approved by Data Translation could void your authority to operate the equipment under Part 15 of the FCC Rules Note This product was verified to meet FCC requirements under test conditions that included use of shielded cables and connectors between system components It is important that you use shielded cables and connectors to reduce the possibility of causing interference to radio television and other electronic devices Canadian Department of Communications Statement This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications
8. 0 0 00 eee eee eee 78 Synchronizing Acquisition on Multiple DT9837A DT9837B or DT9837C Modules 79 Contents Chapter 6 Supported Device Driver Capabilities llus 83 Data Flow and Operation Options 06 66 85 Du fferitig ios cits si Stee Mats TERTRE AAA A A E AAA 86 Triggered Scan Mode i oss din aya eere a ee ead eer ets 86 Data Encoding x vs sar ge ar a ee i a KRE b da sees dad veris 86 Channels ses eere ES oS CEN IA SERO WR TAI RURAL 87 Gain 3s A A A A AAA AAA A A 87 cupo RP 88 R sol tiOH imas rte e CREBRO RUE TRUE CSIRO TO ig Rae ATE R 88 Thermocouple and RTD Support e e eee 89 TEPE Support cnet RE ra tev ee eng ao P Eva id 89 Straim Gage Support c nori ranee eA e Ea e Ab re aa e RR a VER we ea 90 Start Tris gers coe aee ext o e AA Ri 91 Reference Triggers iios sema tomamos eed e mda dava ador tes 92 CLOCKS aac ach ate chun WIEN TAE EO RUE WARREN V RC RE ET EUER A SE AUR e Etsi 93 Counter Timers sis xev E NAT Eee ve exe ete ese ae iron a 94 Tachometer tirar itc x a SERRE IP ORAN RR edu SANE dE UE Edi tas 95 Chapter 7 Troubleshooting ooococoonnncrn Inh 97 General Checklist 3 2321 Rs e Ree e a dtes te e e e ba dd 98 Technical SUpport eec e aber tee a e Eo abe 100 If Your Module Needs Factory Service 101 Chapter 8 Calibration 1 2 x c x x x e K x eee 103 Using the Calibration Utility u un susua 00 105 Calibrating the Analog Input Subsyst
9. Le pr sent appareil num rique n met pas de bruits radio lectriques d passant les limites applicables aux appareils num riques de la class A prescrites dans le R glement sur le brouillage radio lectrique dict par le Minist re des Communications du Canada Table of Contents About this Manual ases aa ae a E eee eee 9 Intended Audiences cca R eee E RR beber ERE da re b wre le 9 How this Manual is Organized 9 Conventions Used in this Manual 10 Related Information 2I o dd Fo se pte oe Te ones 10 Where To Get Help ia eee e tesis E sia mes atta da ida ul bed pass 11 Chapter 1 Overview ooooooccccon Rh n n hn 13 Hardware Features eco e CC Yer ete Ea reb ge inte e p de eR 14 Key Features of the DT9837 sisse n 15 Key Features of the DT9837A RRR RR Ra yrat RORA RRR He ETS Y 16 Key Features of the DI9837B isis enn 18 Key Features of the DT9837C 1 0 eee eee eee eee eee 19 Supported Softwares cb Re a suce SH Goede SSA Eve e ates y ct eee eee T 21 Supported Accessories ri ve Tara T CT eee DR Cae reed tet da t eee diets en 23 Getting Started Procedure reri naa met AE ee a 24 Part 1 Getting Started oi cis cece x ieee ede eee eee eee 25 Chapter 2 Setting Up and Installing the Module o oooooooo 27 Unpacking ete titanene ER mA ovis st phe eats mega bec eda ats 29 Attaching Modules to the Computer ene 30 Connecting Directly to the USB Ports 000 30 Connecting to an Exp
10. described above and the next operation is started automatically Principles of Operation The software automatically synchronizes the value of the tachometer input with the analog input measurements so that all measurements are correlated in time The tachometer input is treated like any other channel in the analog input channel list therefore all the triggering and conversion modes supported for analog input channels are supported for the tachometer input When you read the value of the tachometer input as part of the analog input data stream you might see results similar to the following note that this assumes that the previous measurement value is returned between new measurement values Table 2 An Example of Reading the Tachometer Input as Part of the Analog Input Data Stream Tachometer Time A D Value Input Value Status of Operation 10 5002 0 Operation started but is not complete 20 5004 0 Operation not complete 30 5003 0 Operation not complete 40 5002 12373 Operation complete 50 5000 12373 Next operation started but is not complete 60 5002 12373 Operation not complete 70 5004 12373 Operation not complete 80 5003 14503 Operation complete 90 5002 14503 Next operation started but is not complete Using the count that is returned from the tachometer input you can determine the following e Frequency of a signal pulse the number of periods per second You can calculate the
11. online 49 hot swapping 30 j IEPE features 61 inprocess buffers 86 input channels 60 configuration single ended 42 ranges 61 resolution 61 input FIFO 66 85 internal clock 93 internal excitation current source 89 J J1 connector pin assignments 124 L LabVIEW 22 LED 30 31 LED status indicator 124 legacy CPL elevated 33 LVDS connector pin assignments 122 specifications 119 LV Link 22 M master oscillator specifications 116 MATLAB 22 MaxDifferentialChannels 87 MaxExtClockDivider 93 MaxFrequency 93 MaxMultiScanCount 86 MaxRetriggerFreq 86 MaxSingleEndedChannels 87 MinExtClockDivider 93 MinFrequency 93 MinRetriggerFreq 86 multiple modules triggering 78 muting the output voltage 70 85 N negative threshold trigger 92 number of differential channels 87 gains 87 I O channels 87 resolutions 88 scans per trigger 86 single ended channels 87 voltage ranges 88 NumberOfChannels 87 NumberOfRanges 88 NumberOfResolutions 88 NumberOfSupportedGains 87 Nyquist Theorem 62 O online help 49 Open Layers Control panel 33 Open Layers Control Panel applet 99 operation modes single value analog input 62 single value analog output 69 single values analog input 63 waveform generation 69 oscillator specifications 116 output clock sources 68 ranges 68 output FIFO 70 85 P physical specifications 117 pin assignments 124 positive threshold trigger 91 92 post trigger acquisition mode 85 post tri
12. this mode a waveform which is specified in a single buffer is output repetitively On the DT9837 allocate a buffer less than or equal to 8192 samples and then fill the buffer with the waveform that you want to output On the DT9837A and DT9837C modules you can allocate a buffer of any size and then fill the buffer with the waveform that you want to output 69 Chapter 5 70 When it detects a software trigger the host computer transfers the entire waveform pattern to the 8 kByte output FIFO on the module and the module starts writing output values to the analog output channel at the specified clock rate The module recycles the data allowing you to output the same pattern continuously without any further CPU or USB bus activity When it reaches the end of the FIFO the module returns to the first location of the FIFO and continues outputting the data This process continues indefinitely until you stop it To select waveform generation mode use software to specify the following parameters Specify the data flow as Continuous Specify WrapSingleBuffer as True to use a single buffer Specify the clock source as internal and specify the clock frequency Refer to page 68 for more information about the clock source and frequency Specify a software trigger source described in the next section Note On the DT9837 an error will be reported if you specify a buffer with greater than 8192 samples the size of the output FI
13. 11 2003 A2 2006 Immunity EN61326 1 2006 Electrical Equipment for Measurement Control and Laboratory Use EMC Requirements EN61000 4 2 2009 Electrostatic Discharge ESD 4 kV contact discharge 8 kV air discharge 4 kV horizontal and vertical coupling planes EN61000 4 3 2006 Radiated electromagnetic fields 3 V m 80 to 1000 MHz 3 V m 1 4 GHz to 2 GHz 1 V m 2 GHz to 2 7 GHz EN61000 4 4 2004 Electrical Fast Transient Burst EFT 1 kV on data cables EN61000 4 6 2009 Conducted immunity requirements 3 Vrms on data cables 150 kHz to 80 MHz RoHS EU Directive 2002 95 EG Compliant as of July 1st 2006 Safety UL CSA 118 Specifications Connector Specifications Table 29 lists the connector specifications for the DT9837A DT9837A OEM DT9837B and DT9837C modules Table 29 Connector Specifications Feature Specifications RJ45 LVDS Connector Molex part number 44661 0001 Gate Input Connector AMP Tyco part number 5 146282 4 BNC Connectors DT9837 DT9837A DT9837B and DT9837C BNC Amphenol 31 5540 Mini XLR connectors DT9837C XLR Switchcraft TRAPC3MX a This connector is available on the DT9837A OEM module only 119 Appendix A 120 Connector Pin Assignments and LED Status Indicators aE IRR LE eea che ceeded EE Ter pier bi view be bed rs 122 Dat TUCASA AA AAA AAA 123 LED Status Indicator o R R RKR R NR N E 124
14. 121 Appendix B RJ45 LVDS Connector Figure 27 shows the RJ45 LVDS synchronization connector Contact Identification Figure 27 RJ45 LVDS Synchronization Connector Table 30 lists the pin assignments for the RJ45 LVDS synchronization connector on the DT9837A DT9837A OEM DT9837B and DT9837C modules Table 30 RJ45 LVDS Synchronization Connector Pin Assignments Pin Description 1 Clock An LVDS signal for synchronizing data collection between two modules 2 Clock 3 Trigger An LVTTL signal that is asserted low for triggering between modules 4 Sync An LVTTL signal that is asserted low for synchronizing all the analog input signals between modules for simultaneous sample and hold applications 5 Sync Connected to digital ground through a 100 Q resistor 6 Trigger Connected to digital ground through a 100 Q resistor 7 No Connect 8 No Connect 122 Connector Pin Assignments and LED Status Indicators Gate Input Connector The 4 pin Gate Input connector is available on the DT9837A OEM module only The DT9837B module uses a BNC for the gate input signal Figure 28 shows the orientation of the Gate Input connector on the DT9837A OEM module Pin3 Pin 1 I O O O U I Pin 4 Pin 2 Figure 28 Gate Input Connector Table 31 lists the pin assignments for the Gate Input connector on the DT9837A OEM mod
15. Analog xi Ext Trigger and Clock Input2 0 1 Hz 10 Qs mA 24 Bit d Bi gt gt Ap K Pe D A Analog TM x1 A Y Output 0 Input3 0 1 Hz 10 24 Bit DIA 10 kHz a Sigma P Filter O Delta Trigger p gt 16 bit A D D A A Readback Ext Gate Tachometer Input O The external gate input signal is provided on Ext Trigger the DT9837A OEM module Figure 20 Block Diagram of the DT9837A Module 57 Chapter 5 58 Figure 21 shows a block diagram of the DT9837B module 18 V Compliance Voltage 4 mA Current Q Source Sigma Deltas 24 Bit OTT ere TEE Analog x1 Input 0 0 5 Hz 10 Qs mA 24 Bit a Alp gt gt 1M Analog uH xi Input 0 5 Hz 10 A Qs mA 24 Bit S A D ee 1M Analog d x1 Input2 0 5 Hz 10 K Qs mA 24 Bit Analog 1M ad cul xh Input3 9 5 Hz 10 9 E Tachometer Input Control Logic he USB FIFO High a l 2 0 Speed USB 2 0 A D Interface Clock Ext Trigger and Clock RJ45 Ext Gate o Ext Trigger Figure 21 Block Diagram of the DT9837B Module a Principles of Operation Figure 22 shows a block diagram of the DT9837C module 18 V Compliance Voltage a 2 mA Current Sigma Deltas Source O E 24 Bit UIT Le Analog xi 10
16. Current Source The values INTERNAL EXTERNAL or DISABLED are stored as constants for these controls Note that while the control panel has only two states Enabled and Disabled three states are actually defined as follows INTERNAL Enabled used by the control panel EXTERNAL Disabled 130 Register Level Programming DISABLED Disabled used by the control panel These controls may also be uninitialized if for some reason the module skipped the post manufacturing initialization process To access the storage locations programmatically use the olDiagReadReg and olDiagWriteReg functions The following code shows the location of these controls in the register map define EEPROM_MEM_BASE 0x100000 Coupling storage offsets relative to the base address for the four analog input channels const EEPROM OFFSET COUPLING 0 0x0020 const EEPROM OFFSET COUPLING 1 0x0021 const EEPROM OFFSET COUPLING 2 0x0022 const EEPROM OFFSET COUPLING 3 0x0023 Current source storage offsets relative to the base address for the four analog input channels const EEPROM OFFSET CURRENT SOURCE 0 0x0024 const EEPROM OFFSET CURRENT SOURCE 1 0x0025 const EEPROM OFFSET CURRENT SOURCE 2 0x0026 const EEPROM OFFSET CURRENT SOURCE 3 0x0027 Note olDiagReadReg and olDiagWriteReg require a ULONG value for the data parameter but we are reading and writing only a single
17. DT9837A and DT9837C is 27 MHz Due to the group delay of the Delta Sigma D A converter the DT9837 requires 34 clock pulses while the DT9837A and DT9837C modules require 29 clock pulses once the analog output sample clock is started before the first D A conversion is completed Output Conversion Modes The DT9837 DT9837A and DT9837C modules support single value and waveform analog output operations The DT9837A and DT9837C modules also support continuous analog output operations This section describes each of these conversion modes Note The DT9837A also provides the ability to read the value of the analog output channel in the analog input data stream Refer to page 71 for more information Single Value Mode Single value mode is the simplest to use but offers the least flexibility and efficiency Use software to specify the analog output channel that you want to update and the value to output from that channel The value is output from the specified channel immediately For a single value operation you cannot specify a clock source trigger source or buffer Single value operations stop automatically when finished you cannot stop a single value operation Note On the DT9837 module ensure that no analog input operations are running before performing an analog output operation or an error will be reported Waveform Generation Mode Waveform generation mode is supported on the DT9837 DT9837A and DT9837C modules In
18. Inputo 1Hz Az mA B I 24 Bit m A D Analog 1 10 Input 1 1 Hz Tes G2 mA O 24 Bit A D Analog x1 10 Input2 1Hz Qe mA O 24 Bit ra m A D Analog Input 3 1 Hz a 10 gt Trigger ia Control Logic 8K H D A FIFO 2K __ A D FIFO A D Clock D A Clock Y H9 High Speed USB 2 0 Interface Ext Trigger and Clock USB 2 0 D A Output 0 24 BitD A Sigma 0 Delta Figure 22 Block Diagram of the DT9837C Module Ext Trigger 59 Chapter 5 Analog Input Features This section describes the following features of analog input A D subsystem on the DT9837 Series modules e Analog input channels described on this page e JEPE functions described on page 61 Input resolution described on page 61 Input ranges and gains described on page 61 Input sample clock sources described on page 61 Analog input conversion modes described on page 62 Input triggers described on page 65 e Data format and transfer described on page 66 Error conditions described on page 66 Analog Input Channels The DT9837 Series modules support four single ended analog input channels numbered 0 to 3 All analog input channels are simultaneously clocked If desired you can connect IEPE sensors to these inputs refer to page 61 for more i
19. MHz Once the sample clock is started the module requires 39 clock pulses before the first A D conversion is completed 39 sample rate due to the group delay of the converters The software automatically adjusts for the group delay to provide only valid data in each buffer The tachometer data which does not have the 39 sample group delay is synchronized with the analog data stream This is done through the firmware and device driver by caching the tachometer data and aligning it in time with the analog data in the user s data buffers Analog Input Conversion Modes DT9837 Series modules support single value single values and continuous scan conversion modes This section describes each of these conversion modes Single Value Operations Single value operations are simpler to use than continuous operations Using software you specify the analog input channel 0 1 2 or 3 and the gain that you want to use The module acquires the data from the specified channel and returns the data immediately For single value operations you cannot specify a clock source trigger source scan mode or buffer Single value operations stop automatically when finished you cannot stop a single value operation Note You cannot read the value of tachometer counter 0 described on page 74 tachometer counter 1 described on page 76 gate counter 2 described on page 77 or the analog output readback channel described on page 71 using a standard si
20. Note If you need to configure these settings programmatically instead of using the Open Layers Control Panel you can write to the registers of the module Refer to Appendix C starting on page 125 for more information 35 Chapter 2 36 Wiring Signals Treparing to Wire DINI ui A A ON a eae Wetec 39 Connecting Analog Input Signals iiic T cna cere eg carne erage een t e ete eres 42 Connecting an Analog Output Signal eee eee eer ed 43 Connecting a Tachometer Input Signal sees eee ees ad 44 Connecting a Gate Input Bienal a 0 E 99 esee rhe tene ds de 45 37 Chapter 3 38 C Set Up and Install the Module see Chapter 2 starting on page 27 ON ut Wire Signals this chapter C Verify the Operation of the Module see Chapter 4 starting on page 47 Wiring Signals Preparing to Wire Signals This section provides recommendations and information about wiring signals to a DT9837 Series module Wiring Recommendations Keep the following recommendations in mind when wiring signals to a DT9837 Series module Follow standard ESD procedures when wiring signals to the module Separate power and signal lines by using physically different wiring paths or conduits Toavoid noise do not locate the module and cabling next to sources that produce high electromagnetic fields such as large electric motors power lines solenoids and electric arcs unless the signal
21. Shunt Calibration SupportsShuntCalibration Voltage Excitation Per Channel SupportedPerChannelVoltageExcitation Minimum Excitation Voltage MinExcitationVoltage MaxExcitationVoltage Maximum Excitation Voltage Supported Device Driver Capabilities Start Triggers Table 15 Start Trigger Options DT9837 Series A D Software Trigger Support SupportsSoftwareTrigger Yes D A Yes DIN DOUT C T TACH QUAD External Positive TTL Trigger Support SupportsPosExternalTTLTrigger Yes Yes External Negative TTL Trigger Support SupportsNegExternalTTLTrigger External Positive TTL Trigger Support for Single Value Operations SupportsSvPosExternalTTLTrigger External Negative TTL Trigger Support for Single Value Operations SupportsSvNegExternalTTLTrigger Positive Threshold Trigger Support SupportsPosThresholdTrigger Yes Yes Negative Threshold Trigger Support SupportsNegThresholdTrigger Yes Yes Digital Event Trigger Support SupportsDigitalEventTrigger Threshold Trigger Channel SupportedThresholdTriggerChannel 0 or 0 to 3 0 or 0 to 3f a This trigger is option is not supported for the DT9837B module b On the DT9837A and DT9837C you can use the external trigger to trigger D A subsystem 0 If you choose a threshold trigger for the start trigger on the DT9837 the threshold level is f
22. Windows Security dialog box appears c Click Install this driver software anyway For Windows XP a Click Next and or Finish as required in the wizard Once the firmware is loaded the wizard restarts to initiate the firmware to accept commands b Click Next and or Finish again Note Windows 7 and Windows 8 find the device automatically 5 Repeat these steps until you have attached the number of expansion hubs and modules that you require Refer to Figure 8 The operating system automatically detects the USB devices as they are installed DT9837 Series DT9837 Series Module Y X Module Host Computer E a I Le USB Cable USB Cable H Power Supply 6C MS Expansion d for Hub Power Supply for Hub DT9837 Series DT9837 Series Module Module USB Cables Figure 8 Attaching Multiple Modules Using Expansion Hubs Note Once you have connected your module to the host computer power is turned on to the DT9837 Series module when your application program opens the module The LED on the module turns green to indicate that power is turned on Power is turned off to the module when your application program terminates its connection to the module Setting Up and Installing the Module Configuring the DT9837 Series Device Drivers Note In Windows 7 and Vista you must have administrator privileges to run the Open Layers Control Panel When you double click t
23. ended simultaneous 4 single ended simultaneous 4 single ended simultaneous 4 single ended simultaneous Resolution 24 bits 24 bits 24 bits 24 bits Ranges and gains Gain of 1 10 V 10V 10V 10V Gain of 10 1 1V 1V 1 Gain error Gain of 1 0 02 0 02 0 02 0 02 Gain of 10 0 5 0 5 0 5 0 5 A D type Delta Sigma Delta Sigma Delta Sigma Delta Sigma Maximum sample rate 52 734 kHz 52 734 kHz 105 469 kHZ 105 469 kHZ Minimum sample rate 195 3 Hz 195 3 Hz 195 3 Hz 195 3 Hz Group delay 39 Sample Frequency 39 Sample Frequency 39 Sample Frequency 39 Sample Frequency Pass band at 3 dB 0 49 x Sample 0 49 x Sample 0 49 x Sample 0 49 x Sample Frequency Frequency Frequency Frequency at 100 dB 0 55 x Sample 0 55 x Sample 0 55 x Sample 0 55 x Sample Frequency Frequency Frequency Frequency Pass band ripple x 0 005 dB x 0 005 dB x 0 005 dB x 0 005 dB Signal noise typical 106 dB 106 dB 106 dB 106 dB Total harmonic distortion 90 dB typical 92 dB typical 92 dB typical 92 dB typical 70 5 dB using 1 kHz sine wave sampled at 50 kHz Spurious free dynamic range SFDR using a 1 kHz sine wave sampled at 50 kHz 10 V full scale signal 0 5 dB 90 dB typical 92 dB typical 92 dB typical 92 dB typical 1 V signal 20 dB 105 dB typical 115 dB typical 115 dB typical 115 dB typical 100 mV signal 40 dB 115 dB typical 115 dB typical
24. problem If you still experience problems try using the information in Table 20 to isolate and solve the problem If you cannot identify the problem refer to page 100 Table 20 Troubleshooting Problems Symptom Possible Cause Possible Solution Module is not You plugged the module into your From the Control Panel gt System gt Hardware gt recognized computer before installing the device Device Manager uninstall any unknown driver devices showing a yellow question mark Then run the setup program on your OMNI CD to install the USB device drivers and reconnect your USB module to the computer Module does not The module configuration is incorrect Check the configuration of your device driver respond see the instructions in Chapter 2 The module is damaged Contact Data Translation for technical support refer to page 100 Intermittent operation Loose connections or vibrations exist Check your wiring and tighten any loose connections or cushion vibration sources see the instructions in Chapter 3 The module is overheating Check environmental and ambient temperature consult the module s specifications on page 117 of this manual and the documentation provided by your computer manufacturer for more information Electrical noise exists Check your wiring and either provide better shielding or reroute unshielded wiring see the instructions in Chapter 3 98 Troubleshooting
25. sequential order 63 Chapter 5 64 When it detects the start trigger the module simultaneously acquires pre trigger data from all of the input channels specified in the channel list The sampled data is placed in the allocated buffer s When the reference trigger occurs pre trigger data acquisition stops and post trigger acquisition starts The operation continues until the number of samples you specify for the post trigger scan count are acquired at the point the operation stops Refer to page 65 for more information about triggers The conversion rate is determined by the frequency of the input sample clock refer to page 61 for more information about the input sample clock Using software you can stop a scan by performing either an orderly stop or an abrupt stop In an orderly stop the module finishes acquiring the current buffer stops all subsequent acquisition and transfers the acquired data to host memory any subsequent triggers are ignored In an abrupt stop the module stops acquiring samples immediately the current buffer is not completely filled it is returned to the application only partially filled and any subsequent triggers are ignored To select continuous scan mode use software to specify the following parameters Specify the data flow as Continuous Specify the clock source as internal and specify the clock frequency refer to page 61 Specify the start trigger refer to page 65 Specify the referenc
26. the post trigger scan count has been reached Refer to page 63 for more information Start Trigger Sources The DT9837 Series modules support the following sources for the start trigger Software trigger A software trigger event occurs when you start the analog input operation the computer issues a write to the module to begin conversions Using software specify the start trigger source as a software trigger External digital TTL trigger An external digital TTL trigger event occurs when the module detects a rising edge transition on the signal connected to the Ext Trig connector on the module Using software specify the start trigger source as an external positive digital TTL trigger Note On the DT9837A DT9837B and DT9837C modules if you configure the synchronization mode as slave the RJ45 connector accepts trigger and clock signals from the master you cannot use the Ext Trig connector on the slave module Refer to page 79 for more information Analog threshold trigger For the DT9837 module the start trigger event occurs when the signal attached to analog input channel 0 rises above 1 0 V the fixed threshold level Using software specify the start trigger source as a positive threshold trigger and the threshold trigger channel as channel 0 For the DT9837A and DT9837B modules the start trigger event occurs when the signal attached to analog input channel 0 rises above a user specified threshold
27. the Module 10 For the DT9837A OEM and DT9837B modules you can also measure the time between the A D sample to the specified edge of the gate input signal the time between two gate input signals or the time between the specified edge of the gate input signal to the A D sample by specifying channel 6 gate counter 2 in the analog input channel list see page 77 for more information Configure the Gate CT2 measurement parameters as follows a From the Start Select combo box select the signal that you want to use to start the measurement A D Sample Gate Rising Edge or Gate Falling Edge b From the Stop Select combo box select the signal that you want to use to stop the measurement A D Sample Gate Rising Edge or Gate Falling Edge Note that if you choose to start the measurement using the A D sample choose a gate edge to stop the measurement Likewise if you choose to stop the measurement using the A D sample choose a gate edge to start the measurement c From the Self Clear combo box select Clear to zero the default value if you want to return a value of 0 between measurements or select Keep last Value if you want to return the previous measurement value between readings 11 When you are finished click OK to close the Measurement Options dialog box 12 Repeat steps 4 to 11 for the other modules that you want to configure 13 When you are finished configuring the modules click Close to close the Control Panel
28. use with the DT Open Layers for NET Class Library and the DT9837 Series modules The DT Open Layers for NET Class Library provides properties that return support information for specified subsystem capabilities The first row in each table lists the subsystem types The first column in each table lists all possible subsystem capabilities A description of each capability is followed by the property used to describe that capability in the DT Open Layers for NET Class Library Note The following tables include the capabilities that can be queried However some capabilities may not be supported by your device Blank fields represent unsupported options For more information refer to the description of these properties in the DT Open Layers for NET Class Library online help or DT Open Layers for NET Class Library User s Manual Supported Device Driver Capabilities Data Flow and Operation Options Table 4 Data Flow and Operation Options DT9837 Series Modules Single Value Operation Support SupportsSingleValue A D Yes D A Yes DIN DOUT C T TACH QUAD Simultaneous Single Value Output Operations SupportsSetSingleValues Continuous Operation Support SupportsContinuous Yes Yes Continuous Operation until Trigger SupportsContinuousPreTrigger Continuous Operation before amp after Trigger SupportsContinuousPrePostTrigger Waveform Operations Using FIFO Only SupportsWavef
29. whether you are using USB 2 0 or USB 1 1 run the Open Layers Control Panel applet described in Chapter 2 Standby mode is enabled on your PC For some PCs you may need to disable standby mode on your system for proper USB 2 0 operation Consult Microsoft for more information 99 Chapter 7 Technical Support If you have difficulty using a DT9837 Series module Data Translation s Technical Support Department is available to provide technical assistance To request technical support go to our web site at http www datatranslation com and click on the Support link When requesting technical support be prepared to provide the following information Your product serial number The hardware software product you need help on The version of the OMNI CD you are using Your contract number if applicable If you are located outside the USA contact your local distributor see our web site www datatranslation com for the name and telephone number of your nearest distributor 100 Troubleshooting If Your Module Needs Factory Service If your module must be returned to Data Translation do the following 1 Record the module s serial number and then contact the Customer Service Department at 508 481 3700 ext 1323 if you are in the USA and obtain a Return Material Authorization RMA If you are located outside the USA call your local distributor for authorization and shipping instruct
30. 46 x output frequency 0 567 x output frequency 0 567 x output frequency Specifications Tachometer Input Specifications Table 23 lists the specifications for the tachometer input on the DT9837 DT9837A and DT9837B modules The tachometer is not supported by the DT9837C module Table 23 Tachometer Input Specifications Feature DT9837 Specifications DT9837A Specifications DT9837B Specifications Number of channels 1 1 1 Resolution 31 bits per channel 31 bits per channel 31 bits per channel Input voltage range 30 V 30 V 30 V Threshold voltage 2 V with 0 5 V 2 V with 0 5 V 2 V with 0 5 V hysteresis hysteresis hysteresis Maximum input frequency 380 kHz 1MHz 1 MHz Minimum pulse width high low 1 3 us 0 4 us 0 4 us minimum amount of time it takes a C T to recognize an input pulse Clock frequency for tachometer 12 MHz 12 MHz 12 MHz counter 0 measurements 83 ns resolution 83 ns resolution 83 ns resolution Clock frequency for tachometer counter 1 measurements 48 MHz 21 ns resolution 48 MHz 21 ns resolution 113 Appendix A Gate Input Specifications Table 24 lists the specifications for the gate input on the DT9837A OEM and DT9837B modules Table 24 Gate Input Specifications DT9837A OEM and DT9837B Feature Specifications Signal type LVTTL Input voltage range for gate input sign
31. C modules Table 22 Analog Output Subsystem Specifications Feature DT9837 Specifications DT9837A Specifications DT9837C Specifications Number of analog output channels 1 1 1 Resolution 24 bits 24 bits 24 bits Output range 10V 10 V 3 V Data encoding Offset binary Offset binary Offset binary Output current 1 mA maximum load 10 V across 10 K x3 mA maximum load 10 V across 3 3 K 2 mA maximum load 10 V across 1 5 K FIFO 8192 Samples total 8192 Samples total 8192 Samples total ESD protection Arc 8 kV 8 kV 8kV Contact 4 kV 4 kV 4 kV DC offset 1 5 mV 1 5 mV 1 5 mV Gain error 3 0 0 03 0 03 Filter 10 kHz 2 pole low pass 10 kHz 2 pole low pass Butterworth Butterworth Time delay typical 34 output frequency 29 output frequency 29 output frequency Power fault and reset Goes to 0 V 10 mV if the USB cable is removed or the power fails Total harmonic distortion typical at 0 0015 0 0015 0 0015 1 kHz Internal clock output frequency x 256 output frequency x 512 output frequency x 512 Minimum sample frequency 46 875 kHz 10 kHz 10 kHz Maximum sample frequency 46 875 kHz 52 734 kHz 96 0 kHz Pass band ripple typical 0 002 dB 0 454 x output frequency 0 454 x output frequency 0 454 x output frequency Pass band typical 0 454 x output frequency 0 49 x output frequency 0 49 x output frequency Stop band typical 0 5
32. DATA TRANSLATION UM 22417 W DT9837 Series User s Manual Nineteenth Edition September 2012 Data Translation Inc 100 Locke Drive Marlboro MA 01752 1192 508 481 3700 www datatranslation com Fax 508 481 8620 E mail info datx com Copyright 2006 2012 by Data Translation Inc All rights reserved Information furnished by Data Translation Inc is believed to be accurate and reliable however no responsibility is assumed by Data Translation Inc for its use nor for any infringements of patents or other rights of third parties which may result from its use No license is granted by implication or otherwise under any patent rights of Data Translation Inc Use duplication or disclosure by the United States Government is subject to restrictions as set forth in subparagraph c 1 ii of the Rights in Technical Data and Computer software clause at 48 C F R 252 227 7013 or in subparagraph c 2 of the Commercial Computer Software Registered Rights clause at 48 C F R 52 227 19 as applicable Data Translation Inc 100 Locke Drive Marlboro MA 01752 Data Translation is a registered trademark of Data Translation Inc DT Open Layers DT Open Layers for NET Class Library DataAcq SDK LV Link and DTx EZ are trademarks of Data Translation Inc All other brand and product names are trademarks or registered trademarks of their respective companies Radio and Television Interference
33. FO on the module If you want to output data from the analog output channel on the DT9837 module while acquiring analog input data ensure that you set up and start the analog output operation before starting the analog input operation or an error will be reported The DT9837 DT9837A and DT9837C modules support the ability to mute the output voltage to 0 V Muting the output does not stop the analog output operation instead the analog output voltage is reduced to 0 V over 1020 samples When desired you can unmute the output voltage to its current level Refer to your software documentation for more information on muting and unmuting the output voltage Continuous Analog Output Operations Continuous analog output operations are supported on the DT9837A module only Use continuously paced analog output mode to continuously output buffered values to the analog output channel at a specified clock frequency The DT9837A and DT9837C support the ability to start continuous analog output operations and continuous analog input operations simultaneously Use software to fill multiple output buffers with the values that you want to write to the analog output channel When it detects the specified trigger the module starts writing the values from the output buffer to the analog output channel at the specified clock frequency The operation repeats continuously until either all the data is output from the buffers or you stop the operation Not
34. Gate Type Support SupportsGateHighLevel Low Level Gate Type Support SupportsGateLowLevel High Edge Gate Type Support SupportsGateHighEdge Low Edge Gate Type Support SupportsGateLowEdge Level Change Gate Type Support SupportsGateLevel Clock Falling Edge Type SupportsClockFalling Clock Rising Edge Type SupportsClockRising Gate Falling Edge Type SupportsGateFalling Gate Rising Edge Type SupportsGateRising Interrupt Driven Operations Supportsinterrupt 94 Supported Device Driver Capabilities Tachometer Table 19 Tachometer Options DT9837 Series A D D A DIN DOUT C T TACH QUAD Tachometer Falling Edges SupportsFallingEdge Yes Tachometer Rising Edges SupportsRisingEdge Yes Tachometer Stale Data Flag SupportsStaleDataFlag Yes a On the DT9837 module the starting edge is always rising on the DT9837A and DT9837B modules the starting edge is programmable either rising or falling For the DT9837A and DT9837B you specify the edge using the Open Layers Control Panel applet described on page 33 or by writing to the registers of the module described on page 125 you cannot use the DT Open Layers for NET Class Library to configure these settings b The Stale Data flag can be 0 or 1 on the DT9837A and DT9837B the Stale Data flag is always 0 on the DT9837 For the DT9837A and DT9837B you specify whether to
35. Programming sssese 129 Writing to the General Control Register 4 129 Writing to EEPROM da d uds eto tu EE ei nu depu 130 Index anc A A ee ee es 133 About this Manual The DT9837 Series includes the DT9837 DT9837A DT9837B and DT9837C modules The first part of this manual describes how to install and set up your DT9837 Series module and device driver and verify that your module is working properly The second part of this manual describes the features of the DT9837 Series modules the capabilities of the DT9837 Series Device Drivers and how to program the DT9837 Series modules using the DT Open Layers for NET Class Library software Troubleshooting information is also provided Note For information on checking system requirements installing the software and viewing the documentation refer to the README file on the OMNI CD For more information on the class library refer to the DT Open Layers for NET Class Library User s Manual If you are using the DataAcq SDK or a software application to program your device refer to the documentation for that software for more information Intended Audience This document is intended for engineers scientists technicians or others responsible for using and or programming a DT9837 Series module for data acquisition operations in the Microsoft Windows XP Windows Vista Windows 7 or Windows 8 operating system It is assumed that you have some familiarity with data
36. Support SupportsSyncBusTrigger Analog Input Channels Supported for the Threshold Trigger SupportedThresholdTriggerChannels 0to3 Post Trigger Scan Count Support SupportsPostTriggerScanCount Yes a If you choose a threshold trigger as a reference trigger on any of the DT9837 Series modules you can program the threshold level as a value between 10 V for a gain of 1 or 1 V for a gain of 10 and any of the supported analog input channels can be used as the threshold channel b If you use a reference trigger you can specify how many post trigger samples to acquire after the reference trigger by specifying the post trigger scan count in software Supported Device Driver Capabilities Clocks Table 17 Clock Options DT9837 Series A D D A DIN DOUT C T TACH QUAD Internal Clock Support SupportsinternalClock Yes Yes External Clock Support SupportsExternalClock Simultaneous Input Output on a Single Clock Signal SupportsSimultaneousClocking Yes Base Clock Frequency 24 MHz or 27 BaseClockFrequency 27 MHz MHz 0 0 Maximum Clock Divider MaxExtClockDivider 1 0 1 0 1 1 1 1 Minimum Clock Divider MinExtClockDivider 1 0 1 0 1 1 1 1 46 875 kHz Maximum Frequency 52 734 kHz 52 734 kHz or MaxFrequency 105 469 kHz 96 kHz 0 0 0 0 Minimum Frequency 46 875 kHz or MinFrequency 195 3 Hz 10 kHz 0 0 0 0 a The D A subsyste
37. SupportsDifferential DI Channels MaxDifferentialChannels 0 0 0 0 0 0 Maximum Channel Gain List Depth CGLDepth 45 56 79 or 8 En o o o o Simultaneous Sample and Hold Support SupportsSimultaneousSampleHold Yes Channel List Inhibit SupportsChannelListlnhibit a The D A subsystem is not supported by the DT9837B module b On the DT9837C channels 0 to 3 correspond to the analog input channels c On the DT9837 channels 0 to 3 correspond to the analog input channels channel 4 corresponds to tachometer counter 0 d On the DT9837B channels 0 to 3 correspond to the analog input channels channel 4 corresponds to tachometer counter 0 channel 5 corresponds to tachometer counter 1 and channel 6 corresponds to gate counter 2 e On the DT9837A channels 0 to 3 correspond to the analog input channels channel 4 corresponds to tachometer counter 0 channel 5 corresponds to tachometer counter 1 channel 6 corresponds to gate counter 2 on the DT9837A OEM module and channel 7 corresponds to the analog output readback channel Gain Table 9 Gain Options DT9837 Series Modules A D D A DIN DOUT C T TACH QUAD Programmable Gain Support SupportsProgrammableGain Yes Number of Gains NumberOfSupportedGains 2 1 0 0 0 0 Gains Available SupportedGains 1 and 10 1 a The D A subsystem is not supported by the DT9837B module 87 Chapter 6 Ranges
38. Synchronizing Acquisition on Multiple DT9837A DT9837B or DT9837C Modules 79 55 Chapter 5 56 Figure 19 shows a block diagram of the DT9837 module 18 V Compliance Voltage 4 mA Current CL Source Sai 1M x1 10 0 5 Hz Analog Input 0 Sigma Deltas 24 Bit Alp A 24 Bit S 1 10 dela Analog E 190099 Input o3 Hz Qa mA 24 Bit Ap b ul 1M x1 10 Analog Input2 0 5 Hz Qs mA 24 Bit E em aD AE 1M x1 10 nalog y Input 3 0 5 Hz L Tachometer Input Control Logic fa Clock ag USB High 2 0 Speed USB 2 0 r8 Interface 8K FIFO D A Y Output 0 24 Bit 10 kHz D A Filter Ext Trigger Figure 19 Block Diagram of the DT9837 Module Principles of Operation Figure 20 shows a block diagram of the DT9837A module 18 V Compliance Voltage G Current Sigma Deltas Source 24 Bit 8K Calma ie oh Analog x1 A FRO USB Input o 9 1 Hz 10 High 2 0 2K a i Qs mA AID l Speed 24 Bit s FIFO ka m AID Analog x1 A A D Input 1 0 1 Hz 10 Control HH Clock Qe mA Logic 24 Bit SJ T AID 1M
39. T9837 and DT9837A or 2 75 V for the DT9837C Note At any time you can click Restore Factory Settings to reset the D A calibration values to their original factory settings This process will undo any D A calibration settings Once you have finished this procedure the analog output circuitry is calibrated To close the calibration utility click the close box in the upper right corner of the window m Specifications Analog Input Specification sisse eese ere se ele lee ni ee ok e en e cd eati 110 Analog Output SpeciligalioDs Less iier He e DERI RE Hh nee CR p dete n 112 Tachometer Input Specitications 6 9 R 9 9 R oh HR Re Ee OE E REPRE Y 113 E Iu Spe CONE cs chee tela Ba one de nS Hb Cerea t E 114 Ter ped CSI ence ditch had bob trad K rh Pee e E a be peter debo dete eee LS Master Oscillator 5pecificatlons occiso Ree Re NAR RII ERI E 116 Power Physical and Environmental Specifications 0000 ce eee eee 117 Regulatory Spe GADOR Near Hoe dee Se D HERI eed R RRR ede dg e dece 118 Cannechor Spec E DOS eios eb eR EE A ae swe REPRE Yd eua 119 109 Appendix A Analog Input Specifications Table 21 lists the specifications for the analog input subsystem on the DT9837 Series modules Feature Table 21 Analog Input Subsystem Specifications DT9837 Specifications DT9837A Specifications DT9837B Specifications DT9837C Specifications Number of analog input channels 4 single
40. above a threshold level or a negative high to low transition threshold trigger if you want to trigger when the signal falls below a threshold level Threshold channel Specify any one of the analog input channels that are included in the channel list as the threshold input channel Threshold level Specify a value between 10 V for a gain of 1 or 1 V for a gain of 10 as the threshold level Note If you configure the synchronization mode as slave the RJ45 connector accepts trigger and clock signals from the master you cannot use the Ext Trig connector on the slave module Refer to page 79 for more information Data Format and Transfer Data from the host computer must use offset binary data encoding for analog output signals where 000000 represents 10 V and FFFFFFh represents 10 V Using software specify the data encoding as binary 72 Principles of Operation Error Conditions The DT9837 DT9837A and DT9837C modules report any underrun errors by sending an underrun event to the application This event indicates that the data buffers are not being sent from the host to the module fast enough and the D A converter ran out of data To avoid this error try one or more of the following Reduce the clock rate of the analog output operation s For the DT9837 ensure that you allocate a single buffer with 8192 or fewer samples Close any other applications that are running Runthe program on a faster
41. acquisition principles and that you understand your application How this Manual is Organized This manual is organized as follows Chapter 1 Overview describes the major features of the DT9837 Series modules as well as the supported software and accessories for the modules Chapter 2 Setting Up and Installing the Module describes how to install a DT9837 Series module how to apply power to the module and how to configure the DT9837 Series Device Drivers Chapter 3 Wiring Signals describes how to wire signals to a DT9837 Series module Chapter 4 Verifying the Operation of a Module describes how to verify the operation of a DT9837 Series module with the Quick DataAcq application Chapter 5 Principles of Operation describes all of the features of the DT9837 Series modules and how to access them in your application Chapter 6 Supported Device Driver Capabilities lists the data acquisition subsystems and the associated features accessible using the DT9837 Series Device Drivers About this Manual 10 Chapter 7 Troubleshooting provides information that you can use to resolve problems with the DT9837 Series modules and DT9837 Series Device Driver should they occur Chapter 8 Calibration describes how to calibrate the analog I O circuitry of the DT9837 Series modules Appendix A Specifications lists the specifications of the DT9837 Series modules Appendix B Conn
42. al 0to5V Threshold voltage 2 V with 0 5 V hysteresis Maximum input frequency 1 MHz Minimum pulse width high low 0 4 us Counter resolution 32 bits Clock frequency for gate counter 2 measurements 48 MHz 21 ns resolution 114 Specifications Trigger Specifications Table 25 lists the specifications for the trigger on the DT9837 Series modules Feature DT9837 Specifications Table 25 Trigger Specifications DT9837A DT9837B and DT9837C Specifications Trigger sources Internal software trigger External digital trigger Analog threshold trigger Software initiated Software selectable Software selectable External digital trigger Input type Logic family Input logic load Lower threshold Upper threshold Hysteresis Input sink current Maximum input signal Minimum pulse width high low Edge sensitive positive trigger LVTTL inputs 1 LVTTL 14V 1 3V 0 2V 33 uA 1 3 uA 30 V Analog threshold trigger Type Positive threshold trigger on analog input channel 0 Positive threshold trigger on analog input channel 0 Threshold level 1 0V 0 2 to 49 8 V Hysteresis 100 mV 100 mV Trigger delay 1 conversion period maximum 1 conversion period maximum 115 Appendix A Master Oscillator Specifications Table 26 lists the specifications for the master oscillator on the DT9837A DT9837B and DT9837C modules Table 26 Master Oscillator Specificatio
43. ansion Hub 00 0 ees 31 Configuring the DT9837 Series Device Drivers 0 0 0000 e eee eee 33 Chapter 3 Wiring Signals x e x e x e x cece eee eee 37 Preparing to Wire Signals 0 0 AAA TT eee eee a ee 39 Wiring Recommendations 6 0 e eee 39 Wiring Signals to the Module 39 Connecting Analog Input Signals eee 42 Connecting an Analog Output Signal 43 Connecting a Tachometer Input Signal eens 44 Connecting a Gate Input Signal eee 45 Chapter 4 Verifying the Operation of a Module ooo ooooomoooo 47 Running the Quick DataAcq Application 0 000 49 Testing Single Value Analog Input e 0000 e eee 50 Testing Continuous Analog Input 0 0 6 6 eens 51 Testing Single Value Analog Output 0 000 e eee 52 Contents Part 2 Using Your Module 2 00 xxe eens 53 Chapter 5 Principles of Operation cece eee eee eee eee 55 Analog Input Features o racs penssai R eee enn 60 Analog Input Channels sss rss rsa eniad eiae T eee eee nee 60 Input Ranges and Gains sepre presepe r d KETE Rd enn 61 IEPE FUNCIONS 00 rent rte ieee hats a ees ka eek Weeks ex weet 61 Input Resolution cer dE NA E E TE a edere as 61 Input Clock Source daire ar ete eR in quies RRA Pe gna 61 Analog Input Conversion Modes 0 0000 e cee eee eee ee 62 Single Value Operations e 62 Single Values Operations 000 e eee 63 Continuous Scan Mode
44. asp After the trial period has elapsed you must purchase a license to continue using this application Note The VIBpoint Framework application also supports the DT8837 Series Ethernet LXI instrument modules The VIBpoint Framework application lets you perform the following functions Discover and select your instrument modules Configure all input channel settings for the attached sensor such as the enable state IEPE settings input range tachometer edges counter edges and engineering units for the sensor Load save multiple hardware configurations Oneach instrument module acquire data from all channels supported in the input channel list Logacquired data in the time domain to disk Display acquired data during acquisition in either a digital display using the Channel Overview window or as a waveform using the Plot Area of the main window Perform single channel FFT Fast Fourier Transforms operations on the acquired analog input data You can configure a number of parameters for the FFT including the FFT size windowing type averaging type integration type and so on Choose from a large number of two channel FFT options including Frequency Response Functions Inertance Mobility Compliance Apparent Mass Impedance Dynamic Stiffness or custom FRF with H1 H2 or H3 estimator types Cross Spectrum Power Spectral Density Coherence and Coherent Output Power Display
45. byte last parameter To read the current source power up default for channel 2 use the following code ULONG Channel 2 Current Source OLSTATUS olStatus olDiagReadReg m hDev EEPROM MEM BASE j EPROM OFFSET CURRENT SOURCE 2 amp Channel 2 Current Source 1 I I To set the coupling power up default for channel 0 to AC use the following code OLSTATUS olStatus olDiagWriteReg m hDev j EPROM OFFSET COUPLING 0 ULONG AC 1 I jEPROM MEM BASE I 131 Appendix C 132 A AC coupling 89 accessories 23 79 80 administrator privileges 33 aliasing 62 analog input calibrating 106 channels 60 conversion modes 62 data format and transfer 66 error conditions 66 gain 61 IEPE functions 61 input range 61 resolution 61 sample clock 61 single ended configuration 42 single value operations 62 single values operations 63 specifications 110 testing continuous operations 51 testing single value operations 50 triggers 65 wiring 42 analog output calibrating 108 channels 68 clock sources 68 continuous operations 70 conversion modes 69 data format and transfer 72 error conditions 73 gain 68 ranges 68 resolution 68 single value operations 69 specifications 112 testing single value operations 52 waveform generation mode 69 wiring 43 analog threshold trigger 65 66 72 applet Open Layers Control Panel 99 a
46. ch is derived from the USB clock Use software to specify the internal clock source and the frequency at which to pace the input and output operations and to start the sample clock For the DT9837 and DT9837A the sampling frequency ranges from 195 3 Hz to 52 734 kHz For the DT9837B and DT9837C the sampling frequency ranges from 195 3 Hz to 105 469 kHz 61 Chapter 5 62 Note According to sampling theory Nyquist Theorem specify a frequency that is at least twice as fast as the input s highest frequency component For example to accurately sample a 20 kHz signal specify a sampling frequency of at least 40 KHz to avoid aliasing The modules support a wide pass band of 0 5 Hz 0 1 Hz for the DT9837A to 25 8 kHz 0 49 x sampling frequency to eliminate aliasing allowing you to measure low frequency signals accurately at the Nyquist sampling rate The actual frequency that the module can achieve may be slightly different than the frequency you specified due to the accuracy of the clock You can determine the actual clock frequency using software Internally the value that you specify for the internal clock frequency is multiplied by 512 for frequencies of 52 734 kHz or less or 256 for frequencies greater than 52 734 kHz to set the oscillator on the module For example if you specify an internal clock frequency of 50 kHz the module sets the internal oscillator for the A D converters to 25 6 MHz The maximum timebase is 27
47. ched to a specified analog input channel in the channel list rises above or falls below a user specified threshold value Using software specify the following parameters Reference trigger source Specify a positive low to high transition threshold trigger if you want to trigger when the signal rises above a threshold level or a negative high to low transition threshold trigger if you want to trigger when the signal falls below a threshold level Threshold channel Specify any one of the analog input channels that are included in the channel list as the threshold input channel Threshold level Specify a value between 10 V for a gain of 1 or 1 V for a gain of 10 as the threshold level Data Format and Transfer DT9837 Series modules use offset binary data encoding where 000000 represents negative full scale and FFFFFFh represents positive full scale Use software to specify the data encoding as binary The ADC outputs FFFFFFh for above range signals and 000000 for below range signals Before you begin acquiring data you must allocate buffers to hold the data A Buffer Done event is returned whenever a buffer is filled This allows you to move and or process the data as needed We recommend that you allocate a minimum of two buffers for continuous analog input operations Data is written to multiple allocated input buffers continuously when no more empty buffers are available the operation stops The data is gap free
48. ck DataAcq Application The Quick DataAcq application is installed automatically when you install the driver software To run the Quick DataAcq application do the following 1 If you have not already done so power up your computer and any attached peripherals 2 Click Start from the Task Bar 3 Browse to Programs Data Translation Incl DT Open Layers for Win32 QuickDataAcq The main menu appears Note The Quick DataAcq application allows you to verify basic operations on the board however it may not support all of the board s features For information on each of the features provided use the online help for the Quick DataAcq application by pressing F1 from any view or selecting the Help menu If the system has trouble finding the help file navigate to C Program Piles Data Translation Win32 dtdataacq hlp where C is the letter of your hard disk drive 49 Chapter 4 50 Testing Single Value Analog Input To verify that the module can read a single analog input value do the following 1 Connect a voltage source such as a function generator to analog input channel 0 on the DT9837 Series module Refer to page 42 for an example of how to connect an analog input In the Quick DataAcq application choose Single Analog Input from the Acquisition menu Select the appropriate module from the Board list box In the Channel list box select analog input channel 0 In the Range list box select the range for t
49. computer 73 Chapter 5 Tachometer Input Features 74 You can connect a tachometer signal with a range of 30 V to the DT9837 DT9837A and DT9837B modules The DT9837C does not support a tachometer input On the DT9837 this signal has a maximum frequency of 380 kHz and a minimum pulse width of 1 3 us On the DT9837A and DT9837B modules this signal has a maximum frequency of 1 MHz and a minimum pulse width of 0 4 us The threshold voltage is fixed at 2 V with 0 5 V of hysteresis You can measure the frequency or period of the tachometer input signal using tachometer counter 0 On the DT9837A and DT9837B modules you can also measure the phase of the tachometer input signal in relation to the A D sample using tachometer counter 1 These measurements are described in more detail in the following subsections Frequency or Period Measurements Tachometer Counter 0 Use frequency or period measurements to calculate the rotation speed for high level 30 V tachometer input signals An internal 12 MHz counter tachometer counter 0 is used for the measurement yielding a resolution of 83 ns 1 12 MHz You can read the number of counts between two consecutive starting edges of the tachometer input signal by including channel 4 in the analog input channel list On the DT9837 module the starting edge is always rising on the D19837A and DT9837B modules the starting edge is programmable either rising or falling You can specify the
50. conds if you try to stop or abort the analog input operation on a slave module that is waiting for a trigger If you are using multiple DT9837C modules and want to trigger the master module with an external TTL trigger you must set both the master and the slave modules to use the external TTL trigger for proper operation no physical trigger connection to the slave is required When you stop the master module the slaves continue to run and return data until you stop the analog input subsystem on the slave modules Be sure to stop the analog input subsystems on all DT9837A DT9837B or DT9837C modules before disconnecting the cable from the RJ45 connectors 81 Chapter 5 82 A D Supported Device Driver Capabilities Data Plow and Operation IPOD EN eae ee E R ede rend 85 PUIG MT UMn 86 TU POE I prm 86 IND soa a Mog UE ee t eee Det certat hays de wie daa qot tut diss pene Aiea gd 87 S E n UT 87 n UTRUM 88 pi o eed ubere otn ena A ase Reh Reed etos ond rU os Red ect 88 Thermocouple and STD CUPP cis ecce or rRRES apace meee ek RR RE DRE een 89 EPE T 89 obra oap OUDBOEL T 90 RR 91 a T E 92 A E 93 Conner Y osse b eode x rx te s digest ase su 94 HU LEM 95 83 Chapter 6 84 The DT9837 Series Device Drivers provide support for the analog input A D and analog output D A subsystems For information on how to configure the device drivers refer to page 33 Table 3 DT9837 Ser
51. define EEPROM_MEM BASE 0x100000 const ULONG EEPROM_OFFSET_SETTINGS 15 This example shows how to read this EEPROM location ULONG olddata OLSTATUS olStatus olDiagReadReg m hDev j EPROM OFFSET SETTINGS amp olddata 1 I jEPROM MEM BASE I This example shows how to write values to this EEPROM location ULONG newdata OLSTATUS olStatus olDiagWriteReg m hDev j EPROM OFFSET SETTINGS newdata 1 I jEPROM MEM BASE I Note that the data must be read and written as a 32 bit value but only the lower 8 bits of this value is actually transferred Register Level Programming DT9837A DT9837B and DT9837C Register Level Programming If you need to change the settings of the Open Layers Control Panel for the DT9837A DT9837B or DT9837C programmatically you can use the Data Acq SDK function olDiagWriteReg to write to the following registers of the DT9837A DT9837B or DT9837C module e General Control Register 4 Write to this memory location to change the tachometer and gate settings The DT9837C module does not support this register e EEPROM Write to this memory location to change the coupling and current source settings The following subsections describe writing to these memory locations in more detail Writing to the General Control Register 4 The following example shows how to update the bits of Genera
52. e Make sure that the host computer transfers data to the output channel list fast enough so that the list does not empty completely otherwise an underrun error results Principles of Operation To select continuously paced analog output mode use software to specify the following parameters Specify the data flow as Continuous Specify WrapSingleBuffer as False to use multiple buffers Specify the clock source as internal and specify the clock frequency Refer to page 68 for more information about the clock source and frequency Specify the trigger source as any of the supported trigger sources Refer to page 72 for more information about the supported trigger sources e Tostartthe analog input and analog output operations simultaneously using the DI Open Layers for NET Class Library use the SimultaneousStart AddSubsystem SimultaneousStart PreStart and SimultaneousStart Start methods Refer to the documentation for the DT Open Layers for NET Class Library for more information We recommend that you allocate a minimum of two buffers for a continuously paced analog output operation Data is written from multiple output buffers continuously when no more buffers of data are available the operation stops The data is gap free The DT9837 DT9837A and DT9837C modules support the ability to mute the output voltage to 0 V Muting the output does not stop the analog output operation instead the analog output voltage is reduc
53. e trigger refer to page 66 Specify the post trigger scan count the number of post trigger samples to acquire after the reference trigger occurs Figure 23 illustrates continuous scan mode using a start and reference trigger with a channel list of four entries channel 0 through channel 3 In this example pre trigger analog input data is acquired when the start trigger is detected When the reference trigger occurs the specified number of post trigger samples 3 in this example are acquired Post Trigger Scan Count 3 Chan 3 Chan 3 Chan 3 Chan 3 Chan 3 Chan 2 Chan 2 Chan 2 Chan 2 Chan 2 Chan 1 Chan 1 Chan 1 Chan 1 Chan 1 Chan 0 Chan 0 Chan 0 Chan 0 Chan 0 Input Sample Clock A Pre trigger data acquired 3 Post trigger samples acquired a Start Trigger occurs Reference Trigger occurs Figure 23 Continuous Scan Mode on the DT9837 Series Modules Using a Start and Reference Trigger Principles of Operation Input Triggers A trigger is an event that occurs based on a specified set of conditions On the DT9837 Series modules you can specify a start trigger source and a reference trigger source Pre trigger data acquisition starts when the start trigger event occurs When the reference trigger event occurs pre trigger data acquisition stops and post trigger acquisition starts Post trigger acquisition stops when the number of samples you specify for
54. ector Pin Assignments and LED Status Indicators lists the pin assignments of the connectors on the DT9837 Series modules Appendix C Register Level Programming describes the registers for the DT9837 Series modules An index completes this manual Conventions Used in this Manual The following conventions are used in this manual Notes provide useful information or information that requires special emphasis cautions provide information to help you avoid losing data or damaging your equipment and warnings provide information to help you avoid catastrophic damage to yourself or your equipment Items that you select or type are shown in bold Related Information Refer to the following documents for more information on using the DT9837 Series modules Benefits of the Universal Serial Bus for Data Acquisition This white paper describes why USB is an attractive alternative for data acquisition It is available on the Data Translation web site www datatranslation com DT Open Layers for NET User s Manual UM 22161 For programmers who are developing their own application programs using Visual C or Visual Basic NET this manual describes how to use the DT Open Layers for NET Class Library to access the capabilities of Data Translation data acquisition devices DataAcq SDK User s Manual UM 18326 For programmers who are developing their own application programs using the Microsoft C compiler this manual describes how t
55. ectors wired in parallel DT9837A Device Under Test DT9837B or USB Inputs DT9837C Master RJ45 LVDS External Trigger DT9837A DT9837B or Inputs gt DT9837C Slave RJ45 LVDS DT9837A DT9837B or Inputs DT9837C RJ45 LVDS Slave DT9837A DT9837B or Inputs DT9837C RJ45 LVDS Slave The RJ45 cables must be less than 1 foot in length For minimum clock skew the master module must be less than 4 inches away from the RJ45 distribution panel Figure 26 Synchronizing Four DT9837A DT9837B or DT9837C Modules Using the EP386 RJ45 Distribution Panel Shown Using an External Trigger 80 Principles of Operation When synchronizing multiple modules start the slave modules before starting the master module When the master module is triggered using any of the supported trigger sources both the master and the slave modules start acquiring data at the same time within one A D conversion of the clock Note that you can set the clock rate to be the same or different on each module Note It is important that you start the slave modules first followed by the master module so that the slave receives the appropriate clock and trigger signals from the master If you start the master module before the slaves the slaves never start you will see a delay of approximately 20 se
56. ed to 0 V over 1020 samples When desired you can use unmute the output voltage to its current level Refer to your software documentation for more information on muting and unmuting the output voltage To stop a continuously paced analog output operation you can stop queuing buffers for the analog output system letting the module stop when it runs out of data or you can perform either an orderly stop or an abrupt stop using software In an orderly stop the module finishes outputting the specified number of samples and then stops all subsequent triggers are ignored In an abrupt stop the module stops outputting samples immediately all subsequent triggers are ignored Reading the Analog Output Value in the Analog Input Data Stream DT9837A Only On the DT9837A module you can read back the value of the analog output channel in the analog input data stream Specify channel 7 in the analog input channel list to read back the value of the analog output channel When the analog input operation is started the value of the analog output channel is returned in the analog input data stream An analog value is returned The software automatically synchronizes the value of the analog output channel with the analog input measurements so that all measurements are correlated in time 71 Chapter 5 Output Trigger The DT9837 DT9837A and DT9837C modules support the following trigger sources for starting analog output operations Soft
57. em e e 0 e eee 106 Connecting a Precision Voltage Source 6 6 6c ec o 106 Using the Auto Calibration Procedure 00 0000 106 Using the Manual Calibration Procedure 00 000 107 Calibrating the Analog Output Subsystem isses 108 Appendix A Specifications ooooococonccnrrn n 109 Analog Input Specifications sisse nen 110 Analog Output Specifications r e ZR ST Eae Z a eene 112 Tachometer Input Specifications K K K esee 113 Gate Input Specifications s ai E a a eee ee enn es 114 Trigger Specifications sis cere due bee racer dac aber ae reddo eda ed ad 115 Master Oscillator Specifications 0 0 0 0 0 0 eh 116 Power Physical and Environmental Specifications 0 00000 e eee eee ee 117 Regulatory Specifications ss eens siea e a e pa a enn 118 Connector Specifications o srar cigs mana es us EG rado m ad eee Es 119 Contents Appendix B Connector Pin Assignments and LED Status Indicators 121 RJ45 LVDS Connector 02 0 aie eri eae e RR eR ge O a RE eee 122 Gate Input Connector ert nsss hoods e ye betes nva sada ee x E edu ee gees rre 123 LED Status Indicators ed e e da Lp e eu 124 Appendix C Register Level Programming 2000ceeeeeee een eens 125 DT9837 Register Level Programming sse 126 Writing to the General Control Register 2 0 0 0 eee eens 126 Writing to EEPROMt tuer Nee saa LEO ino Maas tk denies 127 DT9837A DT9837B and DT9837C Register Level
58. f the module as described in Appendix C starting on page 125 The signal that starts the measurement A D sample gate rising edge or gate falling edge The signal that stops the measurement A D sample gate rising edge or gate falling edge Note Note that if you choose to start the measurement using the A D sample choose a gate input edge to stop the measurement Likewise if you choose to stop the measurement using the A D sample choose a gate input edge to start the measurement If you choose the start and stop the measurement using the same gate edge be aware that the stopping edge does not restart the measurement the next starting edge will start the next measurement The value of the Self Clear flag which determines the value that is read between measurements either 0 or the previous measurement value 77 Chapter 5 78 Triggering Acquisition on Multiple Modules Note For DT9837A DT9837B and DT9837C modules you can synchronize acquisition on multiple modules using the RJ45 LVDS synchronization connector described on page 79 The internal clock on the DT9837 DT9837A and DT9837C modules when the synchronization mode is none see page 79 is derived from the USB clock and provides the timing for both the analog input and analog output subsystems on the module You can start acquisition on multiple modules by connecting all modules to a shared external trigger input as shown in Figure 24 When tri
59. following parameters for tachometer counter 0 using the Open Layers Control Panel applet described on page 33 by using software commands or by writing to the registers of the module as described in Appendix C starting on page 125 Thestarting edge of the tachometer input signal to use for the measurement rising or falling edge On the DT9837 module the starting edge is always the rising edge The value read between measurements either zero the default value or the previous measurement value On the DT9837 module this value is always the previous measurement value Aflag called Stale indicating whether or not the data is new If the Stale flag is set as Used the default value the most significant bit MSB of the value is set to 0 to indicate new data reading the value before the measurement is complete returns an MSB of 1 If the Stale flag is set to Not Used the MSB is always set to 0 On the DT9837 module the MSB is always 0 not used When the operation is started the internal 12 MHz counter starts incrementing when it detects the first starting edge of the tachometer input and stops incrementing when it detects the next starting edge of the tachometer input When the measurement is complete the counter timer remains idle until it is read On the next read either 0 or the current value of the tachometer input from the previous measurement operation is returned depending on the module and the Control Panel settings
60. frequency as follows Frequency 12 MHz Number of counts 1 where 12 MHz is the internal counter timer clock frequency For example if the count is 21 the measured frequency is 600 KHz 12 MHz 20 Period of a signal pulse You can calculate the period as follows Period 1 Frequency Period Number of counts 1 12 MHz where 12 MHz is the internal counter timer clock frequency 75 Chapter 5 Phase Measurements Tachometer Counter 1 On the DT9837A and DT9837B modules you can measure the phase of the tachometer input in relation to the A D sample by reading tachometer counter 1 To read the value of this counter specify channel 5 in the analog input channel list An internal 48 MHz clock with 21 ns resolution is used to calculate the measurement which allows you to precisely correlate tachometer measurements with the analog input data You can specify the following parameters for tachometer counter 1 using the Open Layers Control Panel applet described on page 33 or by writing to the registers of the module as described in Appendix C starting on page 125 The signal that starts the measurement A D sample rising edge of the tachometer input signal or falling edge of the tachometer input signal e The signal that stops the measurement A D sample rising edge of the tachometer input signal or falling edge of the tachometer input signal Note Note that if you choose to start the measurement us
61. gger scan count 92 power 31 32 specifications 117 preparing to wire signals 39 Q Quick DataAcq application 22 running 49 135 Index 136 quickDAQ 22 R ranges analog input 61 analog output 68 number of 88 recommendations for wiring 39 reference trigger 66 register level programming DT9837 126 DT9837A 129 DT9837B 129 DT9837C 129 regulatory specifications 118 resolution analog input 61 analog output 68 available 88 number of 88 retrigger clock frequency 86 returning boards to the factory 101 RJ45 connector pin assignments 122 specifications 119 RMA 101 S sample clock 61 scan count 92 SDK 22 simultaneous clocking 93 simultaneous sample and hold support 87 single buffer wrap mode 86 single ended channels 42 87 number of 87 single value configuration 62 single value operations 85 analog output 69 single values configuration 63 software trigger 65 72 91 specifications 109 analog input 110 analog output 112 connector 119 environmental 117 gate input 114 master oscillator 116 physical 117 power 117 regulatory 118 tachometer input 113 triggers 115 start trigger analog threshold trigger 65 external digital TTL trigger 65 software 65 start trigger sources 65 stopping an operation 64 71 SupportedExcitationCurrentValues 89 SupportedGains 87 SupportedResolutions 88 SupportedThresholdTriggerChannel 91 SupportedThresholdTriggerChannels 92 SupportedVoltageRanges 88 Support
62. ggered the modules start acquiring data at the same time Using this connection scheme the measurements of one module may not be synchronous with the measurements of another module due to logic delays in the clocking and USB circuitry Host PC Device Under Test USB USB USB Port 1 Port2 Port n DT9837 Series 1 External Inputs Trigger DT9837 Inputs Series 2 DT9837 Inputs Series n Figure 24 Triggering Multiple Modules Using an External Trigger Source Principles of Operation Synchronizing Acquisition on Multiple DT9837A DT9837B or DT9837C Modules DT9837A DT9837B and DT9837C modules provide an RJ45 LVDS synchronization connector that you can use to connect and synchronize multiple DT9837A DT9837B or DT9837C modules In this scheme one module is the master and the other modules are the slave You specify the synchronization mode master slave or none of the RJ45 connector using software When configured as a master the RJ45 synchronization connector outputs trigger and clock signals When configured as a slave the RJ45 connector accepts trigger and clock signals from the master you cannot use the Ext Trig connector or the analog threshold trigger on the slave module in this configuration When configured as none the default mode the DT9837A DT9837B or DT9837C module uses the USB cl
63. he Open Layers Control Panel icon you may see the Program Compatibility Assistant If you do select Open the control panel using recommended settings You may also see a Windows message asking you if you want to run the Open Layers Control Panel as a legacy CPL elevated If you get this message click Yes If you do not get this message and have trouble making changes in the Open Layers Control Panel right click the DTOLCPL CPL file and select Run as administrator By default this file is installed in the following location Windows 7 and Vista 32 bit C Windows System32 Dtolcpl cpl Windows 7 and Vista 64 bit C Windows SysWOW64 Dtolcpl cpl To configure the device driver for a DT9837 Series module do the following 1 If you have not already done so power up the host computer and all peripherals 2 From the Windows Start menu select Settings Control Panel 3 From the Control Panel double click Open Layers Control Panel The Data Acquisition Control Panel dialog box appears 4 If you want to rename the module click the name of the module that you want to rename click Edit Name enter a new name for the module and then click OK The name is used to identify the module in all subsequent applications 5 Select the module that you want to configure and then click Advanced The Measurement Options dialog box appears 6 For the Coupling type select AC for AC coupling or DC for DC coupling 7 For the Curre
64. he analog input channels and the threshold level is programmable between 10 V for a gain of 1 and 1 V for a gain of 10 b Available on the DT9837A OEM version c Available through a BNC connector on the DT9837B module 14 Overview Key Features of the DT9837 Figure 1 shows the layout of the DT9837 module DT9837 DATA TRANSLATION A pea Sound and Vibration Measurement Control Logic DIA Output External u Trigger f Figure 1 DT9837 Module The key features of the DT9837 module are as follows Simultaneous analog input and waveform analog output operations Analog input subsystem Four simultaneous 24 bit A D converters Throughput rate up to 52 734 kSamples s for simultaneous high resolution measurements Input range of 10 V with software selectable gains of 1 and 10 for an effective input range of 10 V and 1 V Support for IEPE Integrated Electronic Piezoelectric inputs including use of a 4 mA current source and AC or DC coupling Theability to return the value of tachometer counter 0 in the analog input data stream allowing you to measure the period or frequency of the tachometer input signal synchronously with analog input measurements Supports a start trigger for acquiring pre trigger samples and a reference trigger for acquiring post trigger samples You can specify the number of post trigger samples to acquire before stopping the operation For the
65. he channel The default is 10 V Select Single Ended Click Get to acquire a single value from analog input channel 0 The application displays the value on the screen in both text and graphical form Verifying the Operation of a Module Testing Continuous Analog Input To verify that the module can perform a continuous analog input operation do the following 1 99 N 9 11 12 Connect known voltage sources such as the outputs of a function generator to analog input channels 0 and 1 on the DT9837 Series module In the Quick DataAcq application choose Strip Chart from the Acquisition menu Select the module from the Board list box In the V Div list box select the number of volts per division 1 to 5 for the display and in the Rate list box select the update rate for the display 1 to 10 In the Channel list box select analog input channel 1 and then click Add to add the channel to the channel list Note that by default channel 0 is included in the channel list Click Config from the Toolbar In the Config dialog select ChannelType and then select Single Ended In the Config dialog select Range and then select Bipolar Click OK to close the dialog box From the Strip Chart view double click the input range of the channel to see the input range of the module The default is 10 V The display reflects the selected range for all the analog input channels on the module Click Start from the Too
66. he firmware to accept commands b Click Next and or Finish again Note Windows 7 and Windows 8 find the device automatically 4 Repeat these steps to attach another DT9837 Series module to the host computer if desired Note Once you have connected your module to the host computer power is turned on to the module when your application program opens the module The LED on the module turns green to indicate that power is turned on Power is turned off to the module when your application program terminates its connection to the module Connecting to an Expansion Hub Expansion hubs are powered by their own external power supply The practical number of DT9837 Series modules that you can connect to a single USB port depends on the throughput you want to achieve To connect multiple DT9837 Series modules to an expansion hub do the following 1 Attach one end of the USB cable to the module and the other end of the USB cable to an expansion hub 2 Connect the power supply for the expansion hub to an external power supply 3 Connect the expansion hub to the USB port on the host computer using another USB cable The operating system automatically detects the USB module and starts the Found New Hardware wizard 4 For Windows Vista a Click Locate and install driver software recommended The popup message Windows needs your permission to continue appears 31 Chapter 2 32 b Click Continue The
67. hold trigger on any of the analog input channels You can program the threshold value from 10 V to 10 V Analog output subsystem One 24 bit D A converter Single value waveform and continuous streaming output Programmable output rate from 10 kSamples s to 52 734 kSamples s Output range of 10 V Software programmable trigger source software trigger external digital trigger or analog threshold trigger to start the analog output operation Internal clock source shared between the analog input and analog output subsystems RJ45 synchronization LVDS connector for synchronizing acquisition on up to four DT9837A modules 17 Chapter 1 18 Key Features of the DT9837B Figure 3 shows the layout of the DT9837B module Figure 3 DT9837B Module The key hardware features of the DT9837B module are as follows Four simultaneous 24 bit A D converters Internal clock source with a throughput rate up to 105 469 kSamples s for simultaneous high resolution analog input measurements Input range of 10 V with software selectable gains of 1 and 10 for an effective input range of 10 V and 1 V Support for IEPE Integrated Electronic Piezoelectric inputs including use of a4 mA current source with 18 V compliance voltage for AC or DC coupling The ability to return the value of tachometer counter 0 in the analog input data stream allowing you to measure the period or frequency of the tachometer input signal synchronously
68. ies Subsystems DT9837 Series Modules eee eet DOUT TACH E Total Subsystems on Module 180r2P lo a The DT9837 supports D A subsystem 0 to access the capabilities of the analog output subsystem The DT9837B supports D A subsystem 0 to program the threshold value for the analog threshold trigger but the threshold level can also be programmed directly through the analog input subsystem using software b The DT9837A supports two D A subsystem 0 and 1 Use D A subsystem 0 to access the capabilities of the analog output subsystem D A subsystem 1 is available to program the threshold value for the analog threshold trigger but the threshold level can also be programmed directly through the analog input subsystem using software c The DT9837 supports one tachometer input for measuring frequency or period The DT9837A and DT9837B support one tachometer input for measuring frequency or period and a gate input for measuring phase The DT9837C does not support a tachometer input You cannot use the DT Open Layers for NET Class Library to configure the tachometer or gate input on the DT9837 Series modules Instead use the Open Layers Control Panel applet described on page 33 or write to the registers of the module described on page 125 to configure the tachometer and or gate input parameters You read the value of the tachometer and gate input signals through the A D subsystem The tables in this chapter summarize the features available for
69. ine LOCAL BUS BASE 0x400000 define GENERAL CNTRL REG2 LOCAL BUS BASE 0x2 olDiagWriteReg m hDev GENERAL CONTROL REG2 RegValueToWrite 2 General Control Register 2 ControlReg2 Offset 0x2 Note The contents of the registers are reset once the application exits Table 33 describes the bits of General Control Register 2 on the DT9837 module that relate to the programmable settings in the Open Layers Control Panel described on page 33 Table 33 DT9837 General Control Register 2 Bits Type Default Name Description 7 RW 0 Tach Counter 0 Start Select Select the starting edge for the period measurement on Tach Counter 0 0 Tach Input Rising Edge 1 Tach Input Falling Edge 5 RW 0 Tach Counter 0 Mode Select Select the value read in between measured values on Tach Counter 0 0 Previous measurement 1 Zeros 4 RW 0 Tach Counter 0 Flag Select Select whether or not to use the Stale Data flag 0 Stale Data flag not used 1 Stale Data flag used 126 Register Level Programming Writing to EEPROM The Open Layers Control Panel has controls for setting the coupling type and current source for analog input channels 0 1 2 and 3 You can change these settings programmatically by writing to a single byte location in EEPROM on the DT9837 module Table 34 describes the bit values in EEPROM that are used to store the coupling type and current s
70. ing the A D sample choose a tachometer edge to stop the measurement Likewise if you choose to stop the measurement using the A D sample choose a tachometer edge to start the measurement The value of the Self Clear flag which determines the value that is read between measurements either 0 or the previous measurement value 76 Principles of Operation Gate Input Features The DT9837A OEM module provides a 4 pin gate input connector for connecting a TTL gate input signal see page 123 for connector pin assignments The DT9837B module provides a BNC connector for connecting a gate input signal You can read the value of gate counter 2 to measure the time between the following signals Completion of the A D sample to the rising or falling edge of the gate input signal Rising or falling edge of the gate input signal to the rising or falling edge of the gate input signal which you can use to determine the pulse width of the gate signal Rising or falling edge of the gate input signal to the completion of the A D sample For these measurements specify channel 6 in the analog input channel list An internal 48 MHz clock with 21 ns resolution is used for the measurements which allows you to precisely correlate analog input data with measurements from the gate input signal You can specify the following parameters for gate counter 2 using the Open Layers Control Panel applet described on page 33 or by writing to the registers o
71. ingle values operation Continuous Scan Mode Continuous scan mode takes full advantage of the capabilities of the DT9837 Series modules You can specify a channel list clock source start trigger reference trigger post trigger scan count and buffer using software On the DT9837 module you can enter up to 5 entries in the channel list including four analog input channels A D channel 0 to 3 and tachometer counter 0 A D channel 4 described on page 74 On the DT9837A module you can enter up to 8 entries in the channel list including four analog input channels A D channels 0 to 3 tachometer counter 0 A D channel 4 described on page 74 tachometer counter 1 A D channel 5 described on page 76 gate counter 2 A D channel 6 described on page 77 and the analog output readback value A D channel 7 described on page 71 Using software specify the channels you want to sample in sequential order On the DT9837B module you can enter up to 7 entries in the channel list including four analog input channels A D channels 0 to 3 tachometer counter 0 A D channel 4 described on page 74 tachometer counter 1 A D channel 5 described on page 76 and gate counter 2 A D channel 6 described on page 77 Using software specify the channels you want to sample in sequential order On the DT9837C module you can enter up to 4 entries in the channel list analog input 0 to 3 Using software specify the channels you want to sample in
72. ion may take a few seconds to recognize a module once it is plugged back in The DT9837 Series modules use less than 500 mA therefore they do not require an external power supply You must install the device driver for your module before connecting the module s to the host computer Run the installation program on your Data Acquisition OMNI CD to install the device driver and other software for the module Connecting Directly to the USB Ports To connect a DT983 Series module directly to a USB port on your computer do the following 1 Attach one end of the USB cable to the USB port on the module 2 Attach the other end of the USB cable to one of the USB ports on the host computer as shown in Figure 7 The operating system automatically detects the USB module and starts the Found New Hardware wizard DT9837 Series Module USB Ports Host Computer C USB Cable SS Figure 7 Attaching the Module to the Host Computer 30 Setting Up and Installing the Module 3 For Windows Vista a Click Locate and install driver software recommended The popup message Windows needs your permission to continue appears b Click Continue The Windows Security dialog box appears c Click Install this driver software anyway For Windows XP a Click Next and or Finish as required in the wizard Once the firmware is loaded the wizard restarts to initiate t
73. ions see our web site www datatranslation com for the name and telephone number of your nearest distributor All return shipments to Data Translation must be marked with the correct RMA number to ensure proper processing 2 Using the original packing materials if available package the module as follows Wrap the module in an electrically conductive plastic material Handle with ground protection A static discharge can destroy components on the module Place ina secure shipping container 3 Return the module to the following address making sure the RMA number is visible on the outside of the box Customer Service Dept Data Translation Inc 100 Locke Drive Marlboro MA 01752 1192 101 Chapter 7 102 Calibration Meme IST BUMY ese repa waa een epe A COR ee ae eae 105 Calibrating the Analog Input Subsystem 0 2 osos et n reet 106 Calibrating the Analog Output Subsystem 0 0 0 e eee 108 103 Chapter 8 104 DT9837 Series modules are calibrated at the factory and should not require calibration for initial use We recommend that you check and if necessary readjust the calibration of the analog input and analog output circuitry every six months using the DT9837 Series Calibration Utility Note Ensure that you installed the device driver for your module using the Data Acquisition OMNI CD prior to using the calibration utility This chapter describes how to calibrate the analog i
74. it to disk for later analysis DT Open Layers for NET Class Library Use this class library if you want to use Visual C or Visual Basic for NET to develop your own application software for a DT9837 Series module using Visual Studio 2003 or Visual Studio 2005 the class library complies with the DT Open Layers standard DataAcq SDK Use the Data Acq SDK if you want to use Visual Studio 6 0 and Microsoft C or C to develop your own application software for a DT9837 Series module using Windows XP Windows Vista Windows 7 or Windows 8 the DataAcq SDK complies with the DT Open Layers standard DAQ Adaptor for MATLAB Data Translations DAQ Adaptor provides an interface between the MATLAB Data Acquisition DAQ subsystem from The MathWorks and Data Translation s DT Open Layers architecture LV Link An evaluation version of LV Link is included on the Data Acquisition OMNI CD Use LV Link if you want to use the LabVIEW graphical programming language to access the capabilities of the DT9837 Series module Refer to the Data Translation web site www datatranslation com for information about selecting the right software package for your needs Overview Supported Accessories The EP386 panel shown in Figure 5 is available for use with the DT9837A DT9837B and DT9837C modules Figure 5 EP386 Panel This RJ45 distribution panel contains four RJ45 connectors that are wired in parallel making it useful when attaching up to fou
75. ixed at 1 0 V and the threshold channel is analog input channel 0 If you choose a threshold trigger for the start trigger on the DT9837A or DT9837B you can program the threshold level from 0 2 V to 9 8 V and the threshold channel is analog input channel 0 If you choose a threshold trigger for the start trigger on the DT9837C module you can program the threshold level as a value between 10 V for a gain of 1 or 1 V for a gain of 10 and any of the supported analog input channels can be used as the threshold channel d On the DT9837A and DT9837C you can use the analog threshold trigger to trigger D A subsystem 0 The DT9837C supports a negative threshold trigger On the DT9837A you can use analog input channel 0 as the analog theshold trigger channel to start analog output operations On the DT9837C you can use any of the analog input channels as the threshold trigger channel to start analog output operations 91 Chapter 6 92 Reference Triggers Table 16 Reference Trigger Options DT9837 Series External Positive TTL Trigger Support SupportsPosExternalTTLTrigger A D D A DIN DOUT C T TACH QUAD External Negative TTL Trigger Support SupportsNegExternalTTLTrigger Positive Threshold Trigger Support SupportsPosThresholdTrigger Yes Negative Threshold Trigger Support SupportsNegThresholdTrigger Yes Digital Event Trigger Support SupportsDigitalEventTrigger Sync Bus
76. k the value of the analog output channel through the analog input channel list refer to page 71 for more information The DT9837 and DT9837A modules provide a two pole 10 kHz Butterworth filter to prevent noise from interfering with the output signal The analog output channel powers up to a value of 0 V 10 mV Output Ranges and Gains The DT9837 and DT9837A modules can output bipolar analog output signals in the range of 10 V with a gain of 1 The DT9837C module can output bipolar analog output signals in the range of 3 V with a gain of 1 Output Resolution The resolution of the analog output channel is fixed at 24 bits you cannot specify the resolution in software Output Clocks The output clock on the DT9837 DT9837A and DT9837C modules is derived from the USB clock to produce the output clock frequency 68 Principles of Operation On the DT9837 module the clock frequency is fixed at 46 875 kHz On the DT9837A module you can program the clock frequency to value between 10 kHz and 52 734 kHz On the DT9837C module you can program the clock frequency to value between 10 kHz and 96 0 kHz Use software to specify an internal clock source and to specify the clock frequency for the analog output subsystem Internally the value that you specify for the analog output clock frequency is multiplied by 512 to set the oscillator on the module The maximum timebase for the DT9837 is 24 MHz the maximum timebase for the
77. l Control Register 4 on the DT9837A and DT9837B modules using the value specified in the Reg ValueToWrite variable define LOCAL BUS BASE 0x400000 define GENERAL CNTRL REGA LOCAL BUS BASE 0x8 olDiagWriteReg m hDev GENERAL CONTROL REGA RegValueToWrite 2 General Control Register 4 ControlReg4 Offset 0x8 Note The contents of the registers are reset once the application exits Table 35 describes the bits of General Control Register 4 on the DT9837A and DT9837B modules that relate to the tachometer and gate settings in the Open Layers Control Panel described on page 33 Table 35 DT9837A and DT9837B General Control Register 4 Bits Type Default Name Description 15 14 RW 0 Tach Counter 1 Start Select Select the starting edge for the Tach Counter 1 measurement function 00 A D Ready Falling Edge 01 Reserved 10 Tach Input Falling Edge 11 Tach Input Rising Edge 13 12 RW 0 Gate Counter 2 Start Select Select the starting edge for the Gate Counter 2 measurement function 00 A D Ready Falling Edge 01 Reserved 10 Gate Falling Edge 11 Gate Rising Edge 129 Appendix C Table 35 DT9837A and DT9837B General Control Register 4 cont Bits Type Default Name Description 11 10 RW 0 Gate Counter 2 Stop Select Select the stopping edge for the Gate Counter 2 measurement function 00 A D Ready Fal
78. lbar to start the continuous analog input operation The application displays the values acquired from each channel in a unique color on the strip chart view Click Stop from the Toolbar to stop the operation 51 Chapter 4 52 Testing Single Value Analog Output To verify that the module can output a single analog output value on the DT9837 or DT9837A do the following 1 Connect an oscilloscope or voltmeter to analog output channel 0 on the module Refer to page 43 for an example of how to connect analog output signals 2 In the Quick DataAcq application choose Single Analog Output from the Control menu 3 Select the appropriate module from the Board list box 4 In the Channel list box select analog output channel 0 5 In the Range list box select the output range of DACO The default is 10 V 6 Enter an output value or use the slider to select a value to output from DACO 7 Click Send to output a single value from analog output channel 0 The application displays the output value both on the slider and in the text box Part 2 Using Your Module JJ Principles of Operation Analog Input Peatulgs oe cen he Ure peces pe bae eb eoa 60 Analog Output PES 6 N T ehe Denke a haa eee dees EAS RE pe Sew RAR TER T dora 68 Tachometer Input Peatules conidios 74 Gate Input Feltes rs ce bolas eatin Adu aad aoe AAA r Triggering Acquisition on Multiple Modules Ra 0 KR ccc cece cece ees 78
79. lerometer vibration noise or sonar measurements often use IEPE sensors IEPE conditioning is built in to the analog input circuitry of the DT9837 Series modules The modules support the following software programmable IEPE functions for each of the four analog inputs e Excitation current source The DT9837 DT9837A and DT9837B modules provide an internal excitation current source of 4 mA The DT9837C module provides an internal excitation current source of 2 mA You can enable or disable the use of a internal excitation current source using software By default the excitation current source is disabled Coupling type You can select whether AC coupling or DC coupling is used By default DC coupling is selected for the DT9837 DT9837A and DT9837C modules and AC coupling is selected for the DT9837B module The DT9837C also provides a 1 Hz high pass filter You can change the IEPE settings using the Open Layers Control Panel applet described on page 33 or by writing to the registers of the module as described on Appendix C starting on page 125 For information on wiring IEPE inputs refer to page 42 Note If you enable the use of the internal excitation current source it is recommended that you choose AC coupling Input Resolution The resolution of the analog input channels is fixed at 24 bits you cannot specify the resolution in software Input Clock Source The DT9837 Series modules support an internal clock whi
80. libration utility 2 Under the Calibration Settings area of the window select the sampling frequency in Hertz and the gain that you want to use Note By default this utility uses DC coupling with the current source disabled This is the recommended setting for most users While changing these settings is not advised for most users users with unique applications can change these settings by clicking the Advanced button 3 Under the Automatic Calibration area of the window select the channel that you want to calibrate from the Type of Calibration drop down list box and then click the Start button A message appears notifying you to verify that 0 000 V is applied to the channel 4 Verify that the supplied voltage to your selected channel is 0 000 V and then click OK The offset value is calibrated When the offset calibration is complete a message appears notifying you to set the input voltage of the channel to 9 375 V 5 Check that the supplied voltage to your selected channel is 49 375 V and then click OK The gain value is calibrated and a completion message appears 6 Repeat these steps for each analog input channel on the module Note Atany time you can click Restore Factory Settings to reset the A D calibration values to their original factory settings This process will undo any auto or manual calibration settings 106 Calibration Using the Manual Calibration Procedure If you want to manually calib
81. ling Edge 01 Reserved 10 Gate Falling Edge 11 Gate Rising Edge 8 RW 0 Gate Counter 2 Self Clear Select the value read in between measured values on Gate Counter 2 0 Keep the last value 1 Clear to 0 on write to Input FIFO 7 6 RW 0 Tach Counter 1 Stop Select Select the stopping edge for the Tach Counter 1 measurement function 00 A D Ready Falling Edge 01 Reserved 10 Tach Input Falling Edge 11 Tach Input Rising Edge 4 RW 0 Tach Counter 1 Self Clear Select the value read in between measured values on Tach Counter 1 O Keep the last value 1 Clear to 0 on write to Input FIFO 3 RW 0 Tach Counter 0 Start Select Select the starting edge for the period measurement on Tach Counter 0 0 Tach Input Rising Edge 1 Tach Input Falling Edge 1 RW 0 Tach Counter 0 Mode Select Select the value read in between measured values on Tach Counter 0 0 Previous measurement 1 Zeros 0 RW 0 Tach Counter 0 Flag Select Select whether or not to use the Stale Data flag 0 Stale Data flag not used 1 Stale Data flag used Writing to EEPROM On the DT9837A DT9837B and DT9837C modules the Open Layers Control Panel has controls for setting the following parameters which are stored in 8 consecutive bytes of EEPROM Channel0 1 2 and 3 Coupling type The values AC or DC are stored as constants for these controls e Channel 0 1 2 and 3
82. m is not supported by the DT9837B module b The base clock for the D A subsystem on the DT9837 is fixed at 24 MHz the base clock for the D A subsystem on the DT9837A and DT9837C has a maximum frequency of 27 MHz c The DT9837 and DT9837A support a maximum sampling frequency of 52 734 kHz the DT9837B and DT9837C support a maximum sampling frequency of 105 469 KHz d The DT9837 supports a fixed clock frequency of 46 875 KHz for D A subsystem 0 the DT9837A supports programmable clock frequencies from 10 kHz to 52 734 kHz for D A subsystem 0 and the DT9837C supports programmable clock frequencies from 10 kHz to 96 kHz for D A subsystem 0 93 Chapter 6 Counter Timers Table 18 Counter Timer Options DT9837 Series A D D A DIN DOUT C T TACH QUAD Cascading Support SupportsCascading Event Count Mode Support SupportsCount Generate Rate Mode Support SupportsRateGenerate One Shot Mode Support SupportsOneShot Repetitive One Shot Mode Support SupportsOneShotRepeat Up Down Counting Mode Support SupportsUpDown Edge to Edge Measurement Mode Support SupportsMeasure Continuous Edge to Edge Measurement Mode Support SupportsContinuousMeasure High to Low Output Pulse Support SupportsHighToLowPulse Low to High Output Pulse Support SupportsLowToHighPulse Variable Pulse Width Support SupportsVariablePulseWidth None internal Gate Type Support SupportsGateNone High Level
83. nalog input and analog output operations continuous or waveform mode Mini XLR connectors on the DT9837C XLR or BNC connectors on the DT9837C BNC for connecting audio inputs Analog input subsystem Four simultaneous 24 bit A D converters Throughput rate up to 105 469 kSamples s for simultaneous high resolution measurements Input range of 10 V with software selectable gains of 1 and 10 for an effective input range of 10 V and 1 V Support for IEPE Integrated Electronic Piezoelectric inputs including use of a 2 mA current source with 18 V compliance voltage for AC and DC coupling 1 Hz high pass filter Supports a start trigger for acquiring pre trigger samples and a reference trigger for acquiring post trigger samples You can specify the number of post trigger samples to acquire before stopping the operation For the start trigger supports a software programmable trigger source software external digital trigger or analog threshold trigger You can program the analog input threshold trigger to come from any analog input channel to be positive or negative going and to have a threshold value from 10 V to 10 V For the reference trigger supports a positive or negative going analog threshold trigger on any of the analog input channels You can program the threshold value from 10 V to 10 V Analog output subsystem One 24 bit D A converter Single value waveform and continuous streaming output Programmable
84. nformation on IEPE functions Note To maintain simultaneous operation all analog input connections must have the same lead lengths The DT9837 Series modules use Delta Sigma analog to digital converters ADCs that provide anti aliasing filters based on the clock rate These filters remove aliasing which is a condition where high frequency input components erroneously appear as lower frequencies after sampling DT9837 Series modules can acquire a single value from a single analog input channel a single value from all the analog input channels simultaneously or multiple values from a group of analog input channels You can also read data from the following channels if supported by your module e Tachometer counter 0 Supported on the DT9837 DT9837A DT9837 A OEM and DT9837B modules e Tachometer counter 1 Supported on the DT9837A DT9837A OEM and DT9837B modules e Gate counter 2 Supported on the DT9837A OEM and DT9837B modules Analog output readback channel Supported on the DT9837A module Refer to Analog Input Conversion Modes on page 62 for more information on specifying and reading data from these channels 60 Principles of Operation Input Ranges and Gains The DT9837 Series modules provide an input range of 10 V and software selectable gains of 1 and 10 This provides effective input ranges of 10 V when the gain is 1 and 1 V when the gain is 10 IEPE Functions Applications that require acce
85. ngle value operation To read these values specify the channels as part of the analog input channel list using continuous scan mode described on page 63 Principles of Operation Single Values Operations If you prefer to read a single value from all the analog input channels simultaneously using one software call use a single values operation You specify the analog input subsystem and the gain that you want to use for the channels not the channels themselves The module then acquires a value from each input channel simultaneously the data is returned as an array of input values Note For the DT9837 a single values operation also returns a valid value from tachometer counter 0 analog input channel 4 described on page 74 For the DT9837A and DT9837B a single values operation returns values from the analog input channels as well as from tachometer counter 0 described on page 74 tachometer counter 1 described on page 76 gate counter 2 described on page 77 and the analog output readback channel for the DT9837A described on page 71 but only the data from analog input channels 0 through 3 is valid Use continuous scan mode described next to read valid data from the tachometer counters gate counter and analog output readback channel For single values operations you cannot specify a clock source trigger source scan mode or buffer Single values operations stop automatically when finished you cannot stop a s
86. nput and output subsystems of a DT9837 Series module using the calibration utility Calibration Using the Calibration Utility Start the DT9837 Series Calibration Utility as follows 1 Click Start from the Task Bar 2 For the DT9837 module select Programs Data Translation Inc Calibration DT9837 Series Calibration Utility The main window of the DT9837 Series Calibration Utility appears 3 Select the module to calibrate and then click OK Once the calibration utility is running you can calibrate the analog input circuitry either automatically or manually described on page 106 or the analog output circuitry of the module described on page 108 105 Chapter 8 Calibrating the Analog Input Subsystem This section describes how to use the calibration utility to calibrate the analog input subsystem of a DT9837 Series module DT9837 Series modules have separate calibration for each A D input channel Connecting a Precision Voltage Source To calibrate the analog input circuitry you need to connect an external 9 3750 V precision voltage source to the DT9837 Series module Connect the precision voltage source to the first channel you want to calibrate for example Analog In 0 AD Ch0 Using the Auto Calibration Procedure Auto calibration is the easiest to use and is the recommended calibration method To auto calibrate the analog input subsystem do the following 1 Select the A D Calibration tab of the ca
87. ns DT9837A DT9837B and Feature DT9837C Specifications Frequency 48 MHz Accuracy at 25 C 30 ppm Drift over temperature 0 to 70 C 50 ppm Total Aging first year 5 ppm Maximum error first year 85 ppm 116 Specifications Power Physical and Environmental Specifications Table 27 lists the power physical and environmental specifications for the DT9837 Series modules Table 27 Power Physical and Environmental Specifications DT9837 DT9837A DT9837B DT9837C Feature Specifications Specifications Specifications Specifications Power 5 V 0 5V 0 5A 0 30 V8 0 5 A 0 30 V O 425 mA 0 30 VO 0 5 A Physical Dimensions of enclosure Dimensions of PCB only Weight PCB assembly with enclosure PCB assembly Width 100 mm Length 188 98 mm Height 17 29 mm Width 100 mm Length 146 56mm Thickness 1 57 mm 490 74 g 153 09 g Environmental Operating temperature range Storage temperature range Relative humidity Altitude 0 C to 55 C 25 C to 85 C to 9596 noncondensing up to 10 000 feet 117 Appendix A Regulatory Specifications The DT9837 Series is CE compliant Table 28 lists the regulatory specifications for the DT9837 Series modules Table 28 Regulatory Specifications Feature DT9837 Series Specifications Emissions EMI FCC Part 15 Class A EN5501 1 2007 Based on CISPR
88. nt Source select Enabled to enable the internal excitation current source or Disabled to disable the internal excitation current source Note If you enable the use of the internal excitation current source it is recommended that you choose AC coupling Refer to page 42 for more information on wiring IEPE inputs 33 Chapter 2 34 8 You can read the number of counts between two consecutive starting edges of the tachometer input signal by including channel 4 tachometer counter 0 in the analog input channel list On the DT9837 module the starting edge is always rising on the DT9837A and DT9837B modules the starting edge is programmable either rising or falling See page 74 for more information For the DT9837 skip to step 11 For the DT9837A and DT9837B modules configure the Tach CTO measurement parameters as follows a From the Start Select combo box select the edge Rising Edge or Falling Edge of the tachometer input signal that you want to use to start the measurement b From the Measure Mode combo box select Zeros the default if you want to read a value of 0 between measurements or select Previous Measurement if you want to read the previous measurement value if the new measurement value is not yet complete c From the Stale Data combo box select Used the default value if you want to indicate whether or not the measurement value if new or select Not Used if you do not want to indicate whether the mea
89. o use the DT Open Layers DataAcq SDK to access the capabilities of Data Translation data acquisition devices LV Link Online Help This help file describes how to use LV Link with the LabVIEW graphical programming language to access the capabilities of Data Translation data acquisition devices Microsoft Windows XP Windows Vista Windows 7 or Windows 8 documentation USB web site http www usb org About this Manual Where To Get Help Should you run into problems installing or using a DT9837 Series module the Data Translation Technical Support Department is available to provide technical assistance Refer to Chapter 7 for more information If you are outside the United States or Canada call your local distributor whose number is listed on our web site www datatranslation com 11 About this Manual 12 Overview Hardware Featutes conoci eather ere Ald es Be eoe Wee E re wel 14 supported SOMWAIRS sssi csser Re iris rea n pae 21 Supported ACCOSEOTIGS oc isan si de reb resti rerebub eridg Re 3g 6 EEEE Rt End 24 Cotos Saared PROGRES oii cete ber dees e EE ERE EG NER NER ES ra 24 13 Chapter 1 Hardware Features The DT9837 DT9837A DT9837B and DT9837C are high performance multifunction data acquisition modules for the USB Ver 2 0 or Ver 1 1 bus Table 1 lists the major differences among the modules Table 1 Major Differences Among the DT9837 Series Modules
90. ock instead of the RJ45 synchronization connector The synchronization mode remains set until changed or until the application exits You can connect multiple modules in one of two ways Figure 25 shows how to connect a maximum of two DT9837A DT9837B or DT9837C modules by daisy chaining them together through the RJ45 connector Figure 26 shows how to connect a maximum of four DT9837A DT9837B or DT9837C modules by using an RJ45 distribution panel such as the EP386 where the panel contains four RJ45 connectors that are wired in parallel Note You must have revision H or later of the DT9837A module or revision F or later of the DT9837A OEM module to be able to attach four modules together You can identify the revision of your module by looking at the serial number label on your module If you have revision G or earlier of the DT9837A or revision E or earlier of the DT9837A OEM you can attach a maximum of two modules together 79 Chapter 5 Host PC USB USB Port 1 Port 2 Device Under Test DT9837A DT9837B or USB Inputs M DT9837C External Master Trigger RJ45 LVDS DT9837A USB DT9837B or Inputs DT9837C Slave Figure 25 Synchronizing Two DT9837A DT9837BB or DT9837C Modules by Daisy Chaining the RJ45 Connectors Shown Using an External Trigger Host PC USB USB USB USB Port1 Port2 Port3 Port4 EP386 RJ45 Distribution Panel conn
91. ormModeOnly Simultaneous Start List Support SupportsSimultaneousStart Yes Yes Yes Supports Programmable Synchronization Modes SupportsSynchronization Yes Synchronization Modes SynchronizationMode None Master Slave Interrupt Support SupportsInterruptOnChange Output FIFO Size FifoSize 8 kSamples Muting and Unmuting the Output Voltage SupportsMute Yes Auto Calibrate Support SupportsAutoCalibrate a The D A subsystem is not supported by the DT9837B module b To perform a single value analog output operation ensure that no analog input operations are running or an error will be reported c For the DT9837 if you want to output data from the analog output channel while acquiring analog input data ensure that you set up and start the analog output operation before starting the analog input operation or an error will be reported d The DT9837A and DT9837C modules support continuous analog output operations in addition to waveform mode e The DT9837A and DT9837C modules support the ability to start continuous A D and continuous D A operations simultaneously f The DT9837B does not have an output FIFO The output FIFO on the DT9837 DT9837A and DT9837C is 8 kSamples The DT9837A and DT9837 C modules have an input FIFO of 2 kSamples the DT9837B has an input FIFO of 4 kSamples and the DT9837 does not use an input FIFO 85 Chapter 6 Buffe
92. ource values on the DT9837 module Table 34 DT9837 EEPROM Byte Bits Type Default Name Description 0 RW 1 ADC 0 Coupling Select the coupling type for analog input channel 0 0 AC 1 DC 1 RW 1 ADC 1 Coupling Select the coupling type for analog input channel 1 0 AC 1 DC 2 RW 1 ADC 2 Coupling Select the coupling type for analog input channel 2 0 AC 1 DC 3 RW 1 ADC 3 Coupling Select the coupling type for analog input channel 3 0 AC 1 DC 4 RW 1 ADC 0 Current Source Select whether or not to use the 4 mA current source for analog input channel 0 0 Enabled 1 Disabled 5 RW 1 ADC 1 Current Source Select whether or not to use the 4 mA current source for analog input channel 1 0 Enabled 1 Disabled 6 RW 1 ADC 2 Current Source Select whether or not to use the 4 mA current source for analog input channel 2 0 Enabled 1 Disabled 7 RW 1 ADC 3 Current Source Select whether or not to use the 4 mA current source for analog input channel 3 0 Enabled 1 Disabled 127 Appendix C 128 Programmatically you can read the EEPROM location using the olDiagReadReg function and write to the EEPROM location using the olDiagWriteReg function To change a single bit requires a read modify write operation The following constants define the location of the register in EEPROM
93. output rate from 10 kSamples s to 96 kSamples s Output range of 3 V 2 mA output current Software programmable trigger type software trigger external digital trigger or analog threshold trigger to start the analog output operation Internal clock source shared between the analog input and analog output subsystems RJ45 synchronization LVDS connector for synchronizing acquisition on up to four DT9837C modules Overview Supported Software The following software is available for use with the DT9837 Series modules and is included on the Data Acquisition OMNI CD DT9837 Series Device Drivers Two device drivers are provided in the DT9837 Series one for the DT9837 module and one for the DT9837A DT9837B and DT9837C modules The DT9837 Series Device Drivers allow you to use a DT9837 DT9837A DT9837B or DT9837C module with any of the supported software packages or utilities DT9837 Series Calibration Utility This utility described in Chapter 8 starting on page 103 allows you to calibrate the analog input and analog output circuitry of a DT9837 Series module VIBpoint Framework application This application allows you to acquire and analyze data from up to four synchronized DT9837A DT9837A OEM DT9837B or DT9837C modules or one DT9837 USB module You can download a 14 day trial version of this application from the Data Translation web site http www datatranslation com products VIBpoint framework application
94. peration of the Module see Chapter 4 starting on page 47 28 Setting Up and Installing the Module Unpacking Open the shipping box and verify that the following items are present e DT9837 DT9837A or DT9837B module e EP365 USB cable Data Acquisition OMNI CD ROM If an item is missing or damaged contact Data Translation If you are in the United States call the Customer Service Department at 508 481 3700 ext 1323 An application engineer will guide you through the appropriate steps for replacing missing or damaged items If you are located outside the United States call your local distributor listed on Data Translation s web site www datatranslation com Note The DT9837 Series modules are factory calibrated If you decide that you want to recalibrate the analog input or analog output circuitry refer to the instructions in Chapter 8 29 Chapter 2 Attaching Modules to the Computer This section describes how to attach a DT9837 Series module to the host computer Note Most computers have several USB ports that allow direct connection to USB devices If your application requires more DT9837 Series modules than you have USB ports for you can expand the number of USB devices attached to a single USB port by using expansion hubs For more information refer to page 31 You can unplug a module then plug it in again if you wish without causing damage This process is called hot swapping Your applicat
95. pplication wiring analog inputs 42 analog output 43 gate input 45 Index tachometer input 44 applications Quick DataAcq 22 quickDAQ 22 VIBpoint Framework 21 B base clock frequency 93 BaseClockFrequency 93 binary data encoding 86 buffers 86 inprocess flush 86 single wrap mode 86 C C C programs 22 cables USB 30 31 calibrating the module analog input subsystem 106 analog output subsystem 108 running the calibration utility 105 CGLDepth 87 channel list specifying a tachometer input 71 specifying gate counter 2 77 specifying tachometer counter 0 74 specifying tachometer counter 1 76 channel type differential 87 single ended 87 channel gain list depth 87 channels analog input 60 analog output 68 number of 87 clocks analog input 61 analog output 68 base frequency 93 internal 93 maximum external clock divider 93 maximum throughput 93 minimum external clock divider 93 minimum throughput 93 simultaneous 93 133 Index 134 connecting signals analog inputs 42 analog output 43 gate input 45 tachometer input 44 connecting to the host computer 30 connector J1 pin assignments 124 connectors Gate Input 123 RJ45 LVDS 119 122 continuous analog input post trigger 85 continuous analog output 85 continuous counter timer 85 continuous digital I O 85 Control Panel applet 99 conversion modes continuous analog output 70 single value analog input 62 single value analog output 69 single values analog inp
96. r DT9837A DT9837B or DT9837C modules together Refer to page 80 for more information on using this panel Note You must have revision H or later of the DT9837A module or revision F or later of the DT9837A OEM module to be able to attach four modules together You can identify the revision of your module by looking at the serial number label on your module If you have revision G or earlier of the DT9837A or revision E or earlier of the DT9837A OEM you can attach a maximum of two modules together 23 Chapter 1 Getting Started Procedure The flow diagram shown in Figure 6 illustrates the steps needed to get started using a DT9837 Series module This diagram is repeated in each Getting Started chapter the shaded area in the diagram shows you where you are in the getting started procedure Set Up and Install the Module N see Chapter 2 starting on page 27 D Wire Signals see Chapter 3 starting on page 37 Verify the Operation of the Module see Chapter 4 starting on page 47 Figure 6 Getting Started Flow Diagram 24 Part 1 Getting Started Setting Up and Installing the Module WER I ELE 29 Attaching Modules to the Computer 0 6 0 650 cere dR eerte EH eee bee e t 30 Configuring the DT9837 Series Device Divers ee RRR eem tmt 33 Chapter 2 Set Up and Install the Module this chapter Wire Signals see Chapter 3 starting on page 37 Verify the O
97. rate the analog input circuitry instead of auto calibrating it do the following for each channel 1 2 Select the A D Calibration tab of the calibration utility Under the Calibration Settings area of the window select the sampling frequency in Hertz and the gain that you want to use Note By default this utility uses DC coupling with the current source disabled This is the recommended setting for most users While changing these settings is not advised for most users users with unique applications can change these settings by clicking the Advanced button Under the Manual Calibration area of the window select the channel that you want to calibrate and then click the Start button Adjust the offset as follows a Verify that 0 000 V is applied to the channel that you want to calibrate The current voltage reading for this channel is displayed in the AD Value box b Adjust the offset by entering values between 0 and 255 in the Offset edit box or by clicking the up down buttons until the AD Value is 0 000 V Adjust the gain as follows a Verify that 9 375 V is applied to the channel that you want to calibrate The current voltage reading for this channel is displayed in the AD Value box b Adjust the gain by entering values between 0 and 255 in the Gain edit box or by clicking the up down buttons until the AD Value is 9 3750 V Repeat these steps for each analog input channel on the module Note Atany
98. rce Note that the BNC automatically connects the Digital Ground signal appropriately Figure 18 Connecting a Gate Input Signal to a DT9837B Module Note In software you can read the gate measurements as part of the analog input channel list Refer to page 77 for more information on gate input measurements 46 T Verifying the Operation of a Module Running the Quick DataAeq Application i2 4 eT cen ae N R eae Xe erg 49 Testing Single Value Analog Input c c eet e ee e meme 50 Testing Contbiaong Analog Input iioc ERE eee ex E Res 51 Testing Single Value Analog MPU 0 KK cca dresis RVR Ier R eee Eee ne s 52 47 Chapter 4 Set Up and Install the Module see Chapter 2 starting on page 27 Wire Signals see Chapter 3 starting on page 37 Verify the Operation of the Module this chapter You can verify the operation of a DT9837 Series module using the Quick DataAcq application Quick DataAcq lets you do the following Acquire data from a single analog input channel Acquire data continuously from one or more analog input channels using the strip chart or Fast Fourier Transform FFT view e Output a single value from the analog output channel on the DT9837 DT9837A and DT9837C Note This application does not support configuring AC DC coupling or the excitation current source for IEPE inputs 48 Verifying the Operation of a Module Running the Qui
99. ring Table 5 Buffering Options DT9837 Series Modules A D D A DIN DOUT C T TACH QUAD Buffer Support SupportsBuffering Yes Yes Single Buffer Wrap Mode Support SupportsWrapSingle Yes Inprocess Buffer Flush Support SupportsinProcessFlush Yes a The D A subsystem is not supported by the DT9837B module Triggered Scan Mode Table 6 Triggered Scan Mode Options DT9837 Series Modules A D D A DIN DOUT C T TACH QUAD Triggered Scan Support SupportsTriggeredScan Maximum Number of CGL Scans per Trigger MaxMultiScanCount 1 0 0 0 0 0 Maximum Retrigger Frequency MaxRetriggerFreq 0 0 0 0 0 0 Minimum Retrigger Frequency MinRetriggerFreq 0 0 0 0 0 0 Data Encoding Table 7 Data Encoding Options DT9837 Series Modules A D D A DIN DOUT C T TACH QUAD Binary Encoding Support SupportsBinaryEncoding Yes Yes Twos Complement Support SupportsTwosCompEncoding Returns Floating Point Values ReturnsFloats a The D A subsystem is not supported by the DT9837B module 86 Supported Device Driver Capabilities Channels Table 8 Channel Options DT9837 Series Modules A D D A DIN DOUT C T TACH QUAD Number of Channels NumberOfChannels 45 5 7d ore 1 0 0 0 0 SE Support SupportsSingleEnded Yes Yes SE Channels MaxSingleEndedChannels 4 1 0 0 0 DI Support
100. s are enclosed in a mumetal shield Prevent electrostatic discharge to the I O while the module is operational Connect all unused analog input channels to analog ground Wiring Signals to the Module The DT9837 module contains five BNC connectors on one end of the module and two BNC connectors and a USB connector on the other end of the module as shown in Figure 9 PIE KH Sound and Vibration Measurement USB Port Analog Inputs Analog Output External Tachometer Trigger Figure 9 Connectors on the DT9837 Module 39 Chapter 3 The DT9837A module shown in Figure 10 provides all of these connectors and an additional RJ45 LVDS connector for connecting multiple modules The OEM version of the DT9837A shown in Figure 17 on page 45 also provides an additional gate input connector USB Port RJ45 LVDS Port Analog Inputs Analog Output Tachometer External Trigger Figure 10 Connectors on the DT9837A Module OEM Version Shown Figure 11 shows the connectors on the DT9837B module USB Port Analog Inputs RJ45 LVDS Port Gate Input Tachometer External Trigger Figure 11 Connectors on the DT9837B Module 40 Wiring Signals Figure 12 shows the connectors on the DT9837C BNC module the board level OEM version of the module is shown USB Port Analog Inputs RJ45 LVDS Port Analog Output en External Trigger Figure 12 Connectors on the DT9837C BNC Mod
101. sACCoupling 89 SupportsBinary Encoding 86 SupportsBuffering 86 SupportsContinuous 85 SupportsDCCoupling 89 SupportsDifferential 87 SupportsInProcessFlush 86 SupportsInternalClock 93 SupportsInternalExcitationCurrentSrc 89 SupportsMute 85 SupportsNegThreshold Trigger 92 SupportsPosExternalTTL Trigger 91 SupportsPosThresholdTrigger 91 92 SupportsPostTriggerScanCount 92 SupportsProgrammableGain 87 SupportsSimultaneousClocking 93 SupportsSimultaneousSampleHold 87 SupportsSingleEnded 87 SupportsSingleValue 85 SupportsSoftwareTrigger 91 SupportsSynchronization 85 SupportsWaveformModeOnly 85 SupportsWrapSingle 86 synchronization modes 85 SynchronizationMode 85 synchronizing tachometer and analog input data 62 T tachometer input 71 74 counter 0 74 counter 1 76 specifications 113 wiring 44 technical support 100 Index threshold trigger 72 92 channel 91 threshold trigger channels 92 threshold trigger positive 91 throughput maximum 93 minimum 93 transferring data analog input 66 analog output 72 triggered scan number of scans per trigger 86 retrigger frequency 86 triggering acquisition on multiple modules 78 triggers analog input 65 analog threshold 65 72 external 65 72 external positive digital 91 negative threshold 92 positive analog threshold 91 positive threshold 92 software 65 72 91 specifications 115 threshold channel 92 troubleshooting procedure 98 technical support 100 troubleshooting table 98 TTL
102. start trigger supports a software programmable trigger source software external digital trigger or a positive going analog threshold trigger on analog input channel 0 The threshold level is fixed at 1 0 V for the analog threshold trigger 15 Chapter 1 For the reference trigger supports a positive or negative going analog threshold trigger on any of the analog input channels You can program the threshold value from 10 V to 10 V Analog output subsystem One24 bit D A converter Waveform capability of up to 8 192 sample Output rate of 46 875 kSamples s Output range of 10 V A software trigger starts the analog output operation Internal clock source shared between the analog input and analog output subsystems Key Features of the DT9837A Figure 2 shows the layout of the DT9837A module DT9837A Sound and Vibration Me Status hs Clock amp 24 Bit D A Sigma Detta gt DIA D A Readback ao Output Figure 2 DT9837A Module The key hardware features of the DT9837A module are as follows Simultaneous analog input and analog output operations continuous or waveform mode Analog input subsystem Four simultaneous 24 bit A D converters Throughput rate up to 52 734 kSamples s for simultaneous high resolution measurements 16 Overview Input range of 10 V with software selectable gains of 1 and 10 for an effective input range of 10 V and 1 V Suppor
103. surement value is new If you select Used the most significant bit MSB of the measurement value is set to 0 when the value is new and set to 1 when the measurement is not yet complete If you select Not Used the MSB of the measurement value is always 0 On the DT9837A and DT9837B modules you can measure the time from the stopping edge of the tachometer input signal to the A D sample or from the A D sample to the stopping edge of the tachometer input signal by specifying channel 5 tachometer counter 1 in the analog input channel list see page 76 for more information Configure the Tach CT1 measurement parameters as follows a From the Start Select combo box select the signal that you want to use to start the measurement A D Sample Tach Input Rising Edge or Tach Input Falling Edge b From the Stop Select combo box select the signal that you want to use to stop the measurement A D Sample Tach Input Rising Edge or Tach Input Falling Edge Note that if you choose to start the measurement using the A D sample choose a tachometer edge to stop the measurement Likewise if you choose to stop the measurement using the A D sample choose a tachometer edge to start the measurement c Fromthe Self Clear combo box select Clear to zero the default value if you want to return a value of 0 between measurements or select Keep last Value if you want to return the previous measurement value between readings Setting Up and Installing
104. t for IEPE Integrated Electronic Piezoelectric inputs including use of a4 mA current source with 18 V compliance voltage for AC or DC coupling The ability to return the value of tachometer counter 0 in the analog input data stream allowing you to measure the period or frequency of the tachometer input signal synchronously with analog input measurements The ability to read the value of tachometer counter 1 in the analog input data stream allowing you to precisely correlate tachometer measurements with analog input measurements Optional OEM version of this module called the DT9837A OEM supports the ability to read the value of gate counter 2 in the analog input data stream allowing you to precisely correlate gate input measurements with analog input measurements Supports reading analog output values in the analog input data stream allowing you to correlate input and output values Supports a start trigger for acquiring pre trigger samples and a reference trigger for acquiring post trigger samples You can specify the number of post trigger samples to acquire before stopping the operation For the start trigger supports a software programmable trigger source software external digital trigger or a positive going analog threshold trigger on analog input channel 0 You can program the analog input threshold value from 0 2 V to 9 8 V with 0 1 V of hysteresis For the reference trigger supports a positive or negative going analog thres
105. time you can click Restore Factory Settings to reset the A D calibration values to their original factory settings This process will undo any auto or manual calibration settings Once you have finished this procedure continue with Calibrating the Analog Output Subsystem 107 Chapter 8 108 Calibrating the Analog Output Subsystem This section describes how to use the calibration utility to calibrate the analog output subsystem of a DT9837 DT9837A or DT9837C module To calibrate the analog output circuitry you need to connect an external precision voltmeter to analog output channel 0 of the DT9837 DT9837A or DT9837C module Do the following to calibrate the analog output circuitry 1 2 Select the D A Calibration tab of the calibration utility Connect an external precision voltmeter to Analog Output 0 DAC Ch0 of the DT9837 Series module In the DAC Output Voltage box select 9 375 V for the DT9837 and DT9837A or 2 75 V for the DT9837C Adjust the offset by entering values between 0 and 255 in the DAC 0 Offset edit box or by clicking the up down buttons until the voltmeter reads 9 375 V for the DT9837 and DT9837A or 2 75 V for the DT9837C In the DAC Output Voltage box select 9 375 V for the DT9837 and DT9837A or 2 75 V for the DT9837C Adjust the gain by entering values between 0 and 255 in the DAC 0 Gain edit box or by clicking the up down buttons until the voltmeter reads 9 375 V for the D
106. time domain data as it is acquired and or after applying windowing functions Display frequency domain data as Amplitude Phase or Nyquist 21 Chapter 1 22 Configure and view statistics about the FFT data including the frequency and value of the highest peaks Open recorded data in Excel for further analysis Customize many aspects of the acquisition display and recording functions to suit your needs including the clock frequency and the trigger settings You can use the VIBpoint Framework application in one of two modes Acquisition mode which allows you to acquire data or File Reader mode which allows you to view a previously recorded data file Refer the documentation for the VIBpoint Framework application for detailed information about the application Quick DataAcq application The Quick DataAcq application provides a quick way to get up and running using a DT9837 Series module Using this application you can verify key features of the modules display data on the screen and save data to disk Note that this application does not support configuring AC DC coupling or the excitation current source for IEPE inputs The quickDAQ application An evaluation version of this NET application is included on the Data Acquisition OMNI CD quickDAQ lets you acquire analog data from all devices supported by DT Open Layers for NET software at high speed plot it during acquisition analyze it and or save
107. trigger 65 72 U unmuting the output voltage 70 85 unpacking 29 USB cable 30 31 USB expansion hub 31 V VIBpoint Framework application 21 Visual Basic for NET programs 22 Visual C programs 22 voltage ranges 61 88 number of 88 W wiring signals 39 analog inputs 42 analog output 43 gate input 45 preparing 39 recommendations 39 tachometer input 44 writing programs in C C 22 Visual Basic NET 22 Visual C 22 137 Index 138
108. ule DT9837 DT9837A or DT9837C Module Analog Out 0 Note that the connector automatically connects the Analog Ground signal appropriately Figure 15 Connecting an Analog Output Signal to a DT9837 DT9837A or DT9837C Module 43 Chapter 3 Connecting a Tachometer Input Signal You can connect a 30 V tachometer input signal to the tachometer input BNC on a DT9837 DT9837A or DT9837B module as shown in Figure 16 Note In software you can read tachometer measurements as part of the analog input channel list Refer to page 74 for more information on tachometer measurements DT9837 DT9837A or DT9837B Module Tachometer In 0 Signal Source dD gt Figure 16 Connecting a Tachometer Input Signal to a DT9837 DT9837A or DT9837B Module Wiring Signals Connecting a Gate Input Signal The DT9837A OEM module provides a 4 pin Gate Input connector for measuring period frequency and pulse width values The DT9837B provides a BNC connector for attaching a gate input signal Figure 17 shows how to connect a TTL gate input signal to the DT9837A OEM module DT9837A OEM Module Gate Input Connector Digital Gate Input Ground External Source Figure 17 Connecting a Gate Input Signal to the DT9837A OEM Module 45 Chapter 3 Figure 18 shows how to attach a TTL gate input signal to a DT9837B module DT9837B Module Gate Input Signal lt a sou
109. ule Table 31 Gate Input Connector Pin Assignments Pin Description 1 Gate Input 2 No Connect 3 Digital Ground 4 No Connect 123 Appendix B LED Status Indicators The DT9837 Series has a single bi color LED that indicates the status of the module as described in Table 32 Table 32 LED Status Indicators on the DT9828 Module Color of the LED Status Description Green Module is powered Blinking Amber Module is acquring data 124 A Register Level Programming DT9537 Register Level Programuimg oo R 6 0 se ese ee a eee ela mehr ees 126 DT9837A DT9837B and DT9837C Register Level Programming ooooooooooo 129 125 Appendix C DT9837 Register Level Programming If you need to change the settings of the Open Layers Control Panel for the DT9837 programmatically you can use the Data Acq SDK function olDiagWriteReg to write to the following registers of the DT9837 module General Control Register 2 Write to this memory location to change the tachometer settings e EEPROM Write to this memory location to change the coupling and current source settings The following subsections describe writing to these memory locations in more detail Writing to the General Control Register 2 The following example shows how to update the bits of General Control Register 2 on the DT9837 module using the value specified in the RegValueToWrite variable def
110. ule Figure 13 shows the connectors on the DT9837C XLR module the board level OEM version of the module is shown USB Port Analog Inputs RJ45 LVDS Port Analog Output External Trigger Figure 13 Connectors on the DT9837C XLR Module The remaining sections of this chapter describe how to attach signals to these connectors 41 42 Chapter 3 Connecting Analog Input Signals You can connect up to four analog input signals or IEPE sensors to the BNC connectors on a DT9837 Series module Internally these signals are connected in single ended mode The DT9837 Series modules support an input signal range of 10 V using a gain of 1 or 1 V using a gain of 10 Note If you enable the use of the internal excitation current source for IEPE inputs it is recommended that you choose AC coupling Refer to page 60 for more information on IEPE inputs Figure 14 shows how to connect analog inputs channels 0 and 1 in this case to the connectors on the DT9837 Series modules DT9837 Series Module Analog In 0 Signal B Source Analog In 1 e D md I 0 U L le Figure 14 Connecting Analog Inputs to a DT9837 Series Module Wiring Signals Connecting an Analog Output Signal The DT9837 DT9837A and DT9837C modules provide one analog output channel with an output range of 10 V Figure 15 shows how to connect an analog output signal to the DT9837 DT9837A or DT9837C mod
111. upports CJC Source Internally in Hardware SupportsCjcSourcelnternal Supports CJC Channel SupportsCjcSourceChannel Available CJC Channels CjcChannel Supports Interleaved CJC Values in Data Stream SupportsInterleavedCjcTemperaturesInStream Supports Programmable Filters SupportsTemperatureFilters Programmable Filter Types TemperatureFilterType IEPE Support Table 13 IEPE Support Options DT9837 Series A D D A DIN DOUT C T TACH QUAD Software Programmable AC Coupling SupportsACCoupling Yes Software Programmable DC Coupling SupportsDCCoupling Yes Software Programmable External Excitation Current Source SupportsExternalExcitationCurrentSrc Software Programmable Internal Excitation Current Source SupportsinternalExcitationCurrentSrc Yes 004 A Available Excitation Current Source Values or SupportedExcitationCurrentValues 002 A a The DT9837 DT9837A and DT9837B support an internal excitation current of 4 mA while the DT9837C supports an internal excitation current source of 2 mA 89 Chapter 6 90 Strain Gage Support Table 14 Strain Gage Support Options DT9837 Series Strain Gage Support SupportsStrainGage A D D A DIN DOUT C T TACH QUAD External Excitation Voltage SupportsExternalExcitationVoltage Internal Excitation Voltage SupportsinternalExcitationVoltage
112. use the Stale Data Flag using the Open Layers Control Panel applet described on page 33 or by writing to the registers of the module described on page 125 you cannot use the DT Open Layers for NET Class Library to configurethese settings 95 Chapter 6 96 Troubleshooting General Chhecklisl eode rem Pte eter pere aee eee e o ee Sn eee eel 98 Technical SUBDDEE ooo wre nter tee e ahaa ere ptECHH ERU CERES HERD E AU nont 100 If Your Module Needs Factory Service ccce cese et ee em eee 101 97 Chapter 7 General Checklist Should you experience problems using a DT9837 Series module do the following 1 Read all the documentation provided for your product Make sure that you have added any Read This First information to your manual and that you have used this information Check the OMNI CD for any README files and ensure that you have used the latest installation and configuration information available Check that your system meets the requirements stated in the README file on the OMNI CD Check that you have installed your hardware properly using the instructions in Chapter 2 Check that you have installed and configured the device driver for your module using the instructions in Chapter 2 Check that you have wired your signals properly using the instructions in Chapter 3 Search the DT Knowledgebase in the Support section of the Data Translation web site at www datatranslation com for an answer to your
113. ut 63 waveform generation mode 69 conversion rate 64 counter 0 74 counter 1 76 counter 2 77 counter timer 71 channels 87 clock sources 93 coupling type 61 current source 61 89 customer service 101 D DAQ Adaptor for MATLAB 22 data encoding 66 72 86 data flow modes continuous C T 85 continuous digital input 85 continuous post trigger 85 single value 85 waveform stored in FIFO only 85 data format and transfer analog input 66 analog output 72 DataAcq SDK 22 DC coupling 89 device drivers 21 33 differential channels 87 digital trigger 65 72 DT9837 Series Calibration Utility 21 DT Open Layers for NET Class Library 22 E encoding data 66 72 environmental specifications 117 EP386 panel 23 79 80 errors analog input 66 analog output 73 excitation current source 61 available 89 internal 89 expansion hub 31 external clock divider maximum 93 minimum 93 external digital trigger 65 72 positive TTL 91 F factory service 101 features 14 FIFO input 66 85 output 70 85 FifoSize 85 formatting data analog input 66 analog output 72 frequency analog input operations 61 base clock 93 internal A D clock 93 internal A D sample clock 93 internal C T clock 93 internal retrigger clock 86 G gain 61 actual available 87 analog output 68 number of 87 programmable 87 gate input counter 2 77 pin assignments 123 Index specifications 114 119 wiring 45 group delay 62 69 H hardware features 14 help
114. value Using software specify the start trigger source as a positive threshold trigger the threshold trigger channel as channel 0 and the threshold level as a value between 0 2 V and 9 8 V For the DT9837C module the start trigger event occurs when the signal attached to a specified analog input channel in the channel list rises above or falls below a user specified threshold value Using software specify the following parameters Start trigger source Specify a positive low to high transition threshold trigger if you want to trigger when the signal rises above a threshold level or a negative high to low transition threshold trigger if you want to trigger when the signal falls below a threshold level Threshold channel Specify any one of the analog input channels that are included in the channel list as the threshold input channel Threshold level Specify a value between 10 V for a gain of 1 or 1 V for a gain of 10 as the threshold level 65 Chapter 5 66 Note On the DT9837A DT9837B and DT9837C modules if you configure the synchronization mode as slave the RJ45 connector accepts trigger and clock signals from the master you cannot use the analog threshold trigger on the slave module Refer to page 79 for more information Reference Trigger Sources DT9837 Series modules support an analog threshold trigger for the reference trigger The reference trigger event occurs when the signal atta
115. ware trigger A software trigger event occurs when you start the analog output operation the computer issues a write to the module to begin conversions Using software specify the trigger source for D A subsystem 0 as a software trigger External digital TTL trigger This trigger source is supported on the DT9837A and DT9837C modules An external digital TTL trigger event occurs when the module detects a rising edge transition on the signal connected to the Ext Trig connector on the module Using software specify the trigger source for D A subsystem 0 as an external positive digital TTL trigger e Analog threshold trigger This trigger source is supported on the DT9837A and DT9837C modules For the DT9837A module an analog threshold trigger event occurs when the signal attached to analog input channel 0 rises above a user specified threshold value Using software specify the trigger source as a positive threshold trigger the threshold trigger channel as analog input channel 0 and the threshold level as a value between 0 2 V and 9 8 V For the DT9837C module the analog threshold trigger event occurs when the signal attached to a specified analog input channel in the channel list rises above or falls below a user specified threshold value Using software specify the following parameters Start trigger source Specify a positive low to high transition threshold trigger if you want to trigger when the signal rises
116. with analog input measurements The ability to read the value of tachometer counter 1 in the analog input data stream allowing you to precisely correlate tachometer measurements with analog input measurements The ability to read the value of gate counter 2 in the analog input data stream allowing you to precisely correlate gate input measurements with analog input measurements Overview Supports a start trigger for acquiring pre trigger samples and a reference trigger for acquiring post trigger samples You can specify the number of post trigger samples to acquire before stopping the operation e For the start trigger supports a software programmable trigger source software external digital trigger or a positive going analog threshold trigger on analog input channel 0 You can program the analog input threshold value from 0 2 V to 9 8 V with 0 1 V of hysteresis Forthe reference trigger supports a positive or negative going analog threshold trigger on any of the analog input channels You can program the threshold value from 10 V to 10 V s RJ45 synchronization LVDS connector for synchronizing acquisition on up to four DT9837B modules Key Features of the DT9837C Figure 4 shows the layout of DT9837C module The model shown is the board level OEM version with mini XLR connectors Figure 4 DT9837C Module 19 Chapter 1 20 The key hardware features of the DT9837C module are as follows Simultaneous a

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