LOC-F User Manual and Software Guide v1.4
Contents
1. Rate and the Samples to Average value It is currently limited to 24000 S s in LOC F 2CH units and 48000 S s in LOC F 1CH units Device number This is the device number assigned to each individual controller through the National Instruments device driver If only one controller is in use the device number is typically 1 To change the device number change the value in the Device number field and restart the program Clear charts This button clears the data displayed in the Live data plot s in the upper right part of the window Start capture This button initiates loading of data into the buffer which will immediately begin to appear in the Captured data plot s After being pressed the button will change to the Stop capture button Preseine this button AN Pressing this button will bring up the Save data dialog which will save the buffered data displayed in the Captured data plot s into a tab delimited file Wall shear stress Raw signal radio buttons Two output options are available for different values of data Wall shear stress This is the standard output option that will display acquired data as shear stress values in units of Pa These values are generated based on Gage coefficient calibration data supplied with each sensor Raw signal This will display the direct voltage level of the amplified photodiode current generated by light returned from the fiber Bragg gratings within the senso2. instrument should not be opened by the operator If you are experiencing problems please contact Lenterra Inc for assistance 2 LOC F CONTROLLER WHAT S IN THE BOX e LOC F Controller LOC F 1CH or LOC F 2CH e USB Type A to USB Type B Cable e Power Cable WHAT ELSE IS NEEDED e Compatible Lenterra RealShear sensor s e A Microsoft Windows PC Windows XP Windows Vista and Windows 7 supported Recommended minimum PC Specifications e 1available USB 2 0 Port e 2 0 GHz processor or better e 2GBRAM e 500 MB free disk space e LOC F 1CH or LOC F 2CH Controller Software available for download from www lenterra com PANEL DIAGRAMS q f USB Port N Ol Power Indicator Duplex LC Optical Receptacles Front Panel Rear Panel GETTING STARTED e Install the LOC F Controller Software see full step by step instructions e Plug the supplied power cable into the power entry module on the rear panel of the instrument e Plug the supplied USB cable into both the instrument and the PC e Power on the unit with the rear mounted power switch The blue front panel power indicator should light up LOC F Controller User Manual and Software Guide 1 4 3 Note The DAQ circuitry inside the instrument is powered through the USB bus and will operate even when the unit is powered off Ensure that the unit is powered on to achieve proper measurements e Plug in the RealShear sensor s o Clean the fiber connectors prio
3. it is 1 Enter new value in the Device number field stop the program and start it again by pressing the button with an arrow located under the menu in the top left part of the program window 4 ANALOG AND DIGITAL OUTPUTS OPTIONAL Optionally LOC F controller can include two digital and analog outputs for the measured signal This option is indicated with an a inthe controller type such as a two channel controller with analog and digital outputs is identified as LOC F 2CHa LOC F Controller User Manual and Software Guide 1 4 12 PANEL DIAGRAMS The outputs labeled as AO 1 AO 2 and DO 1 and DO 2 Digital output Analog output are accommodated on the rear panel with four BNC ae 1 Channel 1 connectors as shown in the figure a iin Analog output output A Y Channel 2 _ A a EEA A Entry USB Port Module SOFTWARE V 1 2 3A Software version 1 2 3a enables the optional outputs Installation is same and GUI is similar to that described in Chapter 3 with a panel Analog and digital outputs added for each channel as shown in the figure below Analog output generates a DC voltage level that is proportional to the measured wall shear stress The output is controlled with two parameters Conversion coefficient V Pa The output voltage is equal to the product of the wall shear stress value and the conversion coefficient The level ranges from 0 to 5 V In practice the value for the coefficient is chosen base
4. 4565 5 296 3 48100 48105 Wall shear stress Pa Wall shear stress Pa i all shear stress wW E o 48115 LOC F Controller User Manual and Software Guide 1 4 11 In addition to controls described above for the two channel version the four channel software has a run time menu with the following options Start capture Selecting this menu item initiates loading the data into the buffer which and plotting it in the Captured data window s After being selected Start capture caption changes to Stop capture Selecting the Stop capture menu item brings up the Save data dialog which will save the buffered data displayed in the Captured data plot s into a tab delimited file Hide settings pane Selecting this menu item will hide the left panel with the user accessible controls and expand the plots to the full screen The menu caption will change to Settings pane To restore the panel with the controls select the Setting pane menu item Channels Selecting submenu items from the Channels menu will show plots only for the chosen channels For example selecting Channels gt Two channels gt Channels 2 amp 4 will show two plots with data from channels 2 and 4 It is possible to select one two three or four channels at a time View Selecting submenu items from the View menu will show or hide the Live data and Captured data plots For example selecting View gt Captured data plots will hide
5. DOWNLOAD THE SOFTWARE AND OR COMPLETE THE INSTALLATION PROCESS CAREFULLY READ THIS AGREEMENT BY DOWNLOADING THE SOFTWARE AND OR CLICKING THE APPLICABLE BUTTON TO COMPLETE THE INSTALLATION PROCESS YOU CONSENT TO THE TERMS OF THIS AGREEMENT AND YOU AGREE TO BE BOUND BY THIS AGREEMENT IF YOU DO NOT WISH TO BECOME APARTY TO THIS AGREEMENT AND BE BOUND BY ALL OF ITS TERMS AND CONDITIONS CLICK THE APPROPRIATE BUTTON TO CANCEL THE INSTALLATION PROCESS DO NOT INSTALL OR USE THE SOFTWARE AND RETURN THE SOFTWARE WITHIN THIRTY 30 DAYS OF RECEIPT OF THE SOFTWARE WITH ALL ACCOMPANYING WRITTEN MATERIALS ALONG WITH THEIR CONTAINERS TO THE PLACE YOU OBTAINED THEM ALL RETURNS SHALL BE SUBJECT TO NI S THEN CURRENT RETURN POLICY WA LOC F 2CH v1 3 e Accept the Microsoft license agreement License Agreement ou must accept the licenze s displayed below to proceed and press Next MICROSOFT SOFTWARE SUPPLEMENTAL LICENSE TERMS MICROSOFT NET FRAMEWORK 2 0 Microsoft Corporation or based on where you live one of its affiliates licenses this supplement to you If you are licensed to use Microsoft Windows operating system software the software you may use this supplement You may not use itifyou do not have a license for the software You may use a copy ofthis supplement with each validly licensed copy of the software The following license terms describe additional use terms for this supplement These terms and the license terms for the sof
6. LOC F OPTICAL CONTROLLER USER MANUAL AND SOFTWARE GUIDE LENTERRA CONTENTS Te SONG A EP 2 PPP ee eee ee ee ee ee ee eee 2 276 1d er ets IA o o oa 3 Bi POG FOON ole scesceeancesc tans CO 5Nn apsred stuns O evened dretoumecrseemmaesins 3 cia CGS AAA e e 3 Wiar EGIS NO 10 1 0 E PR A ro UN e OO Em ES E ERE E 3 Panel DIAS eisirornacne E a 3 Ca A o Ue o A 3 Trouble SO QUO emsodiocnoiica E casueuacencseteanoncl scan E E A E E 4 Y HOG COMPO lO MW Cunit tt a e aaa 4 installing Te SOM Wasi 4 Bai AAPP 7 SOWIE WINO N e E E E E EE E E E EE TEE E 7 LESCIPUONTO GOO ane E R R E ER E ENEE A eee ee ee EE EE 8 TAKING MOI UONE e a a ti E E E 10 DAA FIO FOIA ams E E E aN pia E EE E pa 10 Four channel version of the SOMW ANS wcascncsccivensinerscnnsszan drid inca 11 WI QUOT S TAO G MINO ura 12 4 Analog and Digital Outputs OPTIONAL ooccccccncnccnnnnccncccconnccnnnncnonnnnonccnnnnonnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnennnnnnonononanas 12 Panar AP PP A didi A E E E E E 13 SONE A SA y IOMA RS Po AP ax 13 1 SAFETY LASER SAFETY The LOC F controller is an IEC 60825 1 Class 1 laser product meaning that it is intrinsically safe and does not pose a health hazard either to the skin or eyes Wavelength Broadband LED output between 1500nm 1600nm Power lt 5 mW LOC F Controller User Manual and Software Guide 1 4 2 ELECTRICAL SAFETY There are no user serviceable parts inside the LOC F controller and the
7. T When the Stop capture button is pressed the program prompts for a filename and location to save data from the buffer the data that is displayed on the Captured Data plot s These files are plain text human readable files with header information and data presented in tab delimited columns Information in Header 8 Lines Device number Measurement rate Samples to average Zero levels Timestamp of last zeroing Gage coefficients Information in Columns Column 1 Date MM DD YY Column 2 Timestamp HH MM SS SSSSSS Column 3 Time elapsed from the start of the measurement in seconds Column 4 Channel 1 Data Wall shear stress in Pascals or Raw data in Volts LOC F Controller User Manual and Software Guide 1 4 10 Column 5 Channel 2 Data Wall shear stress in Pascals or Raw data in Volts Column 6 Inserted note text When the moving average filter is applied to the captured data and the Save button is pressed the program prompts for a filename and location to save data from the buffer the data that is displayed on the Captured Data plot for corresponding channel These files are also plain text human readable files with header information and data presented in tab delimited columns Information in Header 7 Lines Device number Measurement rate Samples to average Channel number Zero level Timestamp of last zeroing Gage coefficient Moving average period Information in Columns Column 1 Date MM DD YY Column 2 Timestam
8. d on upper limit of the wall shear stress range of interest For example variation of stress between 0 and 100 Pa is expected so a coefficient of 0 05 V Pa will produce levels from 0 to 5 V In this example the wall shear stress exceeding 100 Pa will still generate 5 V as well as negative shear stress will result in zero volt signal Note that the analog outputs are disabled when Shear rate or Raw signal radio buttons are selected Unipolar output Unipolar bipolar output In the unipolar output mode the output is zero for zero or negative values of wall shear stress In bipolar mode the analog output is offset by 2 5 V so that zero wall shear stress reads as 2 5 V and negative wall shear stress values generates voltage between 2 5 and zero volts Digital output produces high TTL level when the measured wall shear stress exceeds the predetermined value entered into the control Threshold Pa The digital output will switch to the low TTL level when the measured wall shear stress falls below the threshold parameter multiplied by 0 95 The digital outputs are disabled when Shear rate or Raw signal radio buttons are selected Make sure to select desired parameter values before starting the measurements LOC F Controller User Manual and Software Guide 1 4 13 LOC F OPTICAL CONTROLLER LENTERRA The LOC F Optical Controller is designed for Lenterra s RealShear family of shear stress sensors Together they
9. ers with optional digital and analog outputs For four channel controller LENTERRA 105 Lock St Suite 301 Newark NJ 07103 USA 2012 Lenterra Inc 973 623 0755 All rights reserved www lenterra com Specifications subject to change without notice LOC F Controller User Manual and Software Guide 1 4 14 Notes LENTERRA
10. ficient y yo ys yo cosa where a is the angle between the sensor sensitivity vector and gravitational vector in downward direction e Enter the value for y into the Gage coefficient window for the appropriate channel e Repeat last two steps for another channel if the second sensor is connected to the controller e Set the desired values for Measurement rate and Samples to average e Choose the measurement mode by choosing appropriate radio button Wall shear stress Shear rate or Raw signal e lf the Shear rate mode is chosen enter Viscosity value for each channel separately e Set zero o Press the Clear charts button o Observe the data accumulation for several seconds o Press the Find zero button o Software will set zero by averaging last 1000 pints or all available points if less than 1000 points were accumulated since the Cleat charts button was pressed o Make sure that no flow passes the sensor floating element during zeroing e Repeat the set zero procedure for the second channel if needed e The data will be recorded and displayed on the Captured data screen s after the Start capture button is pressed e When measurement is completed press the Stop capture button a standard Windows save file dialog box will appear e Select the name for the file and desired location and save the data file Note if you repeat measurements keeping settings unchanged it is nonetheless recommended to set zero prior to each measurement DATA FILE FORMA
11. ng you need to run the controller including all National Instruments software The Application Only installer is a smaller file that can be used to upgrade any version that was installed previously using a Full Installer i LOC F 2CH v1 3 e Unzip the file into a temporary Lenterra LOC F 2CH_ 1 3 Full Installer directory and run setup exe ltiz strongly recommended that you exit all programe before running this installer Applications that run in the background such as virus scanning utilities might cause the installer to take longer than average to complete Please wait while the installer initializes LOC F Controller User Manual and Software Guide 1 4 3 LOC F 2CH v1 3 Destination Directory O Choose destination directory for select the primary installation directory program files and press Next All software will be installed in the following location s To install software into a different location s click the Browse button and select another directory Directory for LOC F 20H v1 3 C Program Files 6 86 Lentera LOC F 2CH_ v1 3 Directory for National Instruments products C Program Files lt 86 National Instruments 3 LOC F 2CH v1 3 License Agreement O Accept the National Instruments license ou must accept the license s displayed below to proceed agreement and press Next NATIONAL INSTRUMENTS SOFTWARE LICENSE AGREEMENT INSTALLATION NOTICE THIS 15 A CONTRACT BEFORE YOU
12. p HH MM SS SSSSSS Column 3 Time elapsed from the start of the measurement in seconds Column 4 Data with applied moving average filter Wall shear stress in Pascals or Raw data in Volts Column 5 Inserted note text FOUR CHANNEL VERSION OF THE SOFTWARE The installation procedure and operation of the four channel version of the software is similar to those for one and two channel versions described above The GUI may look like that 4 Lenterra LOC F Controller Software 4 Channel Vi Start capture Hide settings pane Channels View Stop Measurement Samples to Live data ch 1 Live data ch 2 Live data ch 3 Live data ch 4 rate Hz average 588 5 6700 120 00 3 100 61025 Device number 6705 Start capture nas onm 589 589 5 g 67125 69500 Y 673750 6715 t 674000 o 6717 5 E 674250 Wall shear stress Pa Wall shear stress Pa 6720 3 m 674500 6722 5 6725 6727 5 J Wall shear stress 6730 1 Raw signal lt 2 Time s me s Time s Channel 4 Notes Channel 1 Ch 12 Ch 13 181 pecar voi Captured data ch 1 Captured data ch 2 Captured data ch 3 Captured data ch 4 438850 438900 48080 296 4563 5 4564 Zero level V Gage coefficient kPa J1 ai 296 1 gt gt gt findzero 4 a Moving average Period 10 Save 48085 4564 5 438950 48090 4565 Pa 48095
13. provide precision wall shear stress and viscosity measurements for a wide range of applications Applications Scale up of high shear mixer HSM processes from the laboratory to the factory floor Continuous monitoring of mixing operations to prevent under overprocessing Viscosity measurement of flowing or mixing fluids Characterization of multiphase multicomponent flows e g crude oil extraction Features Fast measurement rate to capture high frequency periodic effects and transients up to 10 kHz USB interface with remote PC LabVIEW based remote software to display real time data and capture and save for analysis Microsoft Windows compatible Source code supplied for user customization of software Simple turn key operation Available in 1 or 2 channel versions LOC F 1CH and LOC F 2CH Specifications Optical Electrical Channels 1 O Pairs 1 2 or 4 1CH 2CH or 4CH Voltage Requirements 100 120V 47 63 Hz Connector Type Sealed Duplex LC Power Rating 12 W Output Bandwidth 1500 nm 1600 nm Analog Output Range Oto5V Digital Output TTL Output update rate 100 Hz Data Physical Dimensions WxDxH 7 25 in X 10 5in x 4 in Maximum Meas Rate 10 kHz 18 4 cm x 26 7 cm x 10 2 cm PC Interface USB 2 0 7 25 in x 14 5 in x 4 in 18 4 cm x 37 cm x 10 2 cm Operating Temp 50 F to 105 F 10 C to 40 C Storage Temp 15 F to 105 F 20 C to 40 C For controll
14. r This option is typically only used for diagnosis of the controller and or sensor Channel and Note Tabs Channel 1 and Channel 2 Selecting either the Channel 1 or Channel 2 tabs displays several controls LOC F Controller User Manual and Software Guide 1 4 8 Notes Zero level V This is the zero level corresponding to a zero shear stress condition lt can be automatically generated by applying zero shear stress to the sensor and pressing the Find zero button Gage coefficient kPa The calibration coefficient used to generate shear stress values This number is supplied with each sensor and should be entered by the user before operation for each channel used Find zero Pressing this button will set the zero value at the current level of shear stress typically done when the sensor is experiencing no shear stress It is recommended to zero the sensor as often as is practical for maximum precision Moving average Check the checkbox to apply moving average filter to the captured data and show results on the Captured data plot This checkbox will be active when the Stop capture button is pressed and captured data are displayed on the two bottom plots Period Parameter of the moving average filter Save Pressing this button will bring up the Save data dialog which will save the data with applied moving average filter from corresponding channel into a tab delimited file This button will be active when the Mo
15. r to connection to the controller using an appropriate cleaner such as CLETOP optical fiber connector cleaner or compatible o Insert the pair of LC PC connectors on the RealShear sensor into the front panel receptacle slide the protective collar onto the receptacle and rotate clockwise to lock into position The connector is keyed for proper orientation do not force the connector into the receptacle If the connector does not insert easily rotate 180 degrees e Start the LOC F Controller Software TROUBLESHOOTING e The indicator light does not illuminate when turn on the instrument Ensure that the power cable is plugged in fully and that AC voltage is available from the wall socket The AC power input on the unit is protected with two 1A fuses 5mmx20mm Using a flat head screwdriver the fuse holder located between the power switch and power plug receptacle can be opened to inspect fuses and replace fuses as necessary 3 LOC F CONTROLLER SOFTWARE In order to use LOC F controllers a PC is needed with the LOC F 1CH or LOC F 2CH Controller Software installed The software is developed using NI LabVIEW programming language and requires the LabVIEW Runtime Engine included with the controller software or a pre existing LabVIEW installation INSTALLING THE SOFTWARE Download the software from www lenterra com For each version of the software there is a Full Installer and Application Only Installer The Full Installer includes everythi
16. t from file C Program Files amp 86 Lenterra LOC F 2CH_v1 3 configData nce Note It is possible to skip this step by pressing Cancel if the controller is not plugged in or unavailable at the time of installation The hardware configuration can be imported later through National Instruments Measurement and Automation Explorer under File gt Import An example of the location of the file is Program FileslLenterralLOC F 2CH_v1 3lconfigData nce e After installation a shortcut LOC F 1CH v1 3 is added to the MS Windows start menu and on the desktop LOC F Controller User Manual and Software Guide 1 4 6 DESCRIPTION OF SOFTWARE SOFTWARE WINDOW The software window Is divided into three main sections Side Panel The panel on the left side of the window contains all of the user accessible controls Live Data Plot s In the upper right portion of the window are the Live data plots only one plot is present in the LOC F 1CH version of the software These plots continuously display measurements generated by the controller Captured Data Plot s In the lower right portion of the window are the Captured data plots only one plot is present in the LOC F 1CH version of the software These plots are inactive until the Start capture button is pressed at which point they display buffered data that can later be saved to disk Note By default the x axes and y axes of the plots are autoscaled To manually set
17. the Live data plots and show only the Captured data plots Stop Selecting the Stop menu item will cause a clean exit from the software and will write the various software parameters Measurement rate Gage coefficients etc to a configuration file When the program is started again this configuration data is accessed automatically so re entry by the user is not necessary TROUBLESHOOTING e When restart the program the settings are set to default values not the values that were present before the program was last closed The configuration file in which these settings are stored is saved in the software directory in Program Files If the program is run by a user that does not have write privileges in this directory the program will not be able to save these settings Granting write privileges to the user for this directory or running the program as Administrator can solve this problem e have a sensor connected but the software is measuring a constant value even when varying shear stress is being applied The DAQ circuitry inside the instrument is powered through the USB bus and will operate even when the unit is powered off Ensure that the unit is powered on to achieve proper measurements e have the program running but no data are shown on the Live data plots If you have more than one controller or installed another National Instruments DAQ cards you should choose the Device number corresponding to the controller you use by default
18. the scales the user can right click on any axis and uncheck AutoScale Then by double clicking on the tick mark numbers the user can manually enter desired axis limits 13 Lenterra LOC F Controller Software 2 Channel v1 o Live data channel 1 Live data channel 2 2000 Measurement Samples to rate Hz average 9000 4100 00 100 7000 ar Device number 5000 1 Clearchares Y agq0 1000 500 D 500 Wall shear stress Pa Wall shear stress Pa 1000 J Wall shear stress 1500 Raw signal eae Channel 1 Channel 2 Notes 0 01 Time s Zero level V Gage coefficient kPa ON data channel 2 A J1 yi 1500 amp 2 al 1000 Moving average Period J 10 Save Wall shear stress Pa Wall shear stress Pa 000 eee ieee A 1 taa E S S O 1 NA I GO OS T 85 2025 73435 4 AS SSF 665 Y TS E 832950 Time s Screenshot of LOC F 2CH Controller Software v1 3 LOC F Controller User Manual and Software Guide 1 4 DESCRIPTION OF CONTROLS Measurement rate Hz The rate at which shear stress data points will be memorized and displayed 6 gt Samples to average The number of points to average to produce each memorized data point This should generally A be set to the maximum possible value for the desired Y measurement rate Note The sample rate of the A D converter in the controller is the product of the Measurement
19. tware apply to your use ofthis supplement Ifthere is a conflict these supplemental license terms apply By using this supplement you acceptthese terms Ifyou do not accept them do not use this supplement Ifyou comply with these license terms you have the rights below li SIIPPMPT SERWICES POR cI IPAL EMERIT Mierncaf nrewidec cunnart canicas faor thic LOC F Controller User Manual and Software Guide 1 4 5 do not accept the License Agreement e Start installation of files by pressing Next e Restart computer when prompted At this point the controller should be connected to the USB port on the PC e After restarting a dialogue will appear to import the hardware configuration from the configData nce file located in the directory the controller software was installed into Click Next and accept defaults in the series of screens that appear afterward 3 LOC F 2CH v1 3 Start Installation Review the following summary before continuing Adding or Changing NI System Configuration 1 1 3 e LOC F 2CH 1 3 Files NI DAQms 9 2 3 NIMAS Configuration Support LabVIEW C Interface NI Measurement amp Automation Explorer 4 7 7 Click the Next button to begin installation Click the Back button to change the installation settings gy Configuration Import Wizard B Welcome to the Configuration Import Wizard This wizard imports configuration data for El NI DAQmx 9 2 y M Impor
20. ving average checkbox is checked Notes Under this tab is a text field where the user can enter a text note during data acquisition By pressing the Add Note button the text will be entered into the data file in the column next to the data point generated at that time This can be a handy way to document changes that may occur during experiment flow rate mixture etc and correlate them with changes in the wall shear stress Quit Program Pressing this button will cause a clean exit from the software and will write the various software parameters Measurement rate Gage coefficients etc to a configuration file When the program is started again this configuration data is accessed and entered automatically so re entry by the user is not necessary Measurement Delay If the measurement rate is set too high the software will display a warning The Queue size displayed is the number of data points that have not been processed and displayed yet in the Capture data plot s If this queue exceeds the available memory program execution will halt If you are seeing this warning you should reduce the measurement rate Installing on a PC with a faster processor or larger available RAM may also help with this problem LOC F Controller User Manual and Software Guide 1 4 9 TAKING MEASUREMENTS e Start the software e Using sensor gage coefficients y and y available from the sensor Calibration Sheet calculate the effective gage coef
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