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DT9837 Series User`s Manual

1. Gate Input Connector 4 1 Ext Trigger J12 090 00 Digital A Gate Input Ground External Source Figure 10 Connecting a Gate Input Signal to the DT9837A OEM Module Figure 11 shows how to attach TTL gate input signal to a DT9837B module DT9837B Module USB Port LED D Gate Input Signal Gate Input 4 Source Ext Trigger Note that the BNC automatically connects the Digital Ground signal appropriately Figure 11 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 66 for more information on gate input measurements 38 NL Verifying the Operation of a Module Running the Quick DataAcg Application i2 ececkeeecheeeete e Feat me Xe hd 41 Testing Single Value Analog Input c oomonipccrcos ee sieaa e een 42 Testing Continous Analog Dput ooo rs e Ehe EE ER 43 Testing Single Value Analog MPU 0 cd wr e erem eee E Eee Enea ES 39 Chapter 4 Set Up and Install the Module see Chapter 2 starting on page 23 Wire Signals see Chapter 3 starting on page 31 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
2. Note The contents of the registers are reset once the application exits Table 30 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 29 Table 30 DT9837 General Control Register 2 Bits Type Default Name Description 7 RW 0 Tach Counter O 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 O 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 128 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 31 describes the bit values in EEPROM that are used to store the coupling type and current source values on the DT9837 module Table 31 DT9837 EEPROM Byte Bits Type Default Name Description 0 RW 1 ADC 0 Coupling Select the coupling type for analog input channel 0 0
3. 4 mA Current Sigma Deltas f Source 24 Bit O AID Anal a 1 nalog xi Input o 0 T Hz 10 Qs mA 24 Bit AD P 1M Analog x1 Input1 0 1 Hz 10 El E mA 24 Bit O AID Analog TM x1 Input2 0 1 Hz 10 Qs mA 24 Bit O J Ap 1M Analog x1 Input 3 0 1 Hz 10 A Tachometer Input 4 Trigger La ka Control Logic 8K H D A FIFO USB 2K High gt 2 0 AD lp Speed FIFO USB 2 0 Interface A D Clock Ext Trigger and Clock The external gate input signal is provided on the DT9837A OEM module Figure 13 Block Diagram of the DT9837A Module D A gt Clock D A Y Output 0 24 BitD A 10 kHz a Sigma ip Filter O Delta 16 bit A D D A pl Readback al Ext Gate Q Ext Trigger 49 Chapter 5 50 Figure 14 shows a block diagram of the DT9837B module x 18 V Compliance Voltage G d nA Curran Sigma Deltas Source l 24 Bit O T A D Anal s 1 A nalog xi Input 0 0 5 Hz 10 Qa mA 24 Bit O N l A D e 1M Analog x1 Input 1 0 5 Hz 10 Ss et mA 24 Bit AD gt Analog s x1 A Input2 0 5 Hz 10 Qa mA 24 Bit O l A D Analog TM 1 A E xi Input3 9 5 Hz 10 Tachometer Input
4. Control Logic he USB FIFO High me 2 0 Speed USB 2 0 A D Interface Clock Ext Trigger and Clock RJ45 Ext Gate 2 Ext Trigger Figure 14 Block Diagram of the DT9837B Module E Principles of Operation Analog Input Features This section describes the following features of analog input A D subsystem on the DT9837 Series modules Analog input channels described on this page IEPE functions described on page 52 Input resolution described on page 52 Input ranges and gains described on page 51 Input sample clock sources described on page 52 Analog input conversion modes described on page 53 Input triggers described on page 55 Data format and transfer described on page 56 Error conditions described on page 57 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 52 for more information 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 e
5. 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 133 Appendix C 134 A AC coupling 77 accessories 19 68 69 aliasing 52 analog input calibrating 108 channels 51 conversion modes 53 data format and transfer 56 error conditions 57 gain 51 IEPE functions 52 input range 51 resolution 52 sample clock 52 single ended configuration 35 single value operations 53 single values operations 53 specifications 112 testing continuous operations 43 testing single value operations 42 triggers 55 wiring 35 analog output calibrating 110 channels 58 clock sources 58 continuous operations 60 conversion modes 59 data format and transfer 62 error conditions 62 gain 58 ranges 58 resolution 58 single value operations 59 specifications 114 testing single value operations 44 waveform generation mode 59 wiring 36 analog threshold trigger 56 61 applet Open Layers Control Panel 101 application wiring analog inputs 35 analog output 36 gate input 38 tachometer input 37 Index applications LV Link 18 Measure Foundry 17 Quick DataAcq 17 VIBpoint Framework 17 B base clock frequency 79 BaseClockFrequency 79 binary data encoding 74 buffers 74 inprocess flush 74 single wrap mode 74 C C C programs 17 cables USB 26 27
6. Threshold Value Enter the user specified threshold value If you select a Hardware trigger type enter a value between 0 2 V and 9 8 V as the threshold value If you select a Software trigger type select the appropriate threshold value for that input type Type If you select Hardware the threshold event occurs when the signal attached to analog input channel 1 on the master module rises above the user specified threshold with 0 1 V of hysteresis If you select Software you can select any of the channels as the input trigger source The threshold event occurs when the signal attached to this input channel rises above the user specified threshold value 91 Chapter 7 Ratio of pre post trigger data to analyze If you select a Software trigger type you can specify how much data to analyze before the threshold trigger occurs pre trigger data and how much data to analyze after the threshold trigger occurs post trigger data by using the slider bar Start acquisition by clicking the Start button from the main window or from the Acquisition menu by selecting Start You can display the data in the Chart Recorder provided in the main window or as numerical data using the Channel Overview window Chart Recorder Channel Name Show Master Ain 0 a Master Ain 0 F Slave Ain 0 Slave Ain 0 FFT Visible Group The Chart Recorder allows you to log data to disk and display data from the channels that you
7. Tachometer Input Features You can connect a tachometer signal with a range of 30 V to the DT9837 Series modules 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 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 following parameters for tachometer counter 0 using the Open Layers Control Panel applet described on page
8. 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 Measure Foundry Manual UM 19298 and online help These documents describe how to use Measure Foundry to build drag and drop test and measurement applications for Data Translation data acquisition devices 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 to 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 or Windows 7 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 Depa
9. 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 Toolbar 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 43 Chapter 4 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 NS g o p M Connect an oscilloscope or voltmeter to analog output channel 0 on the module Refer to page 36 for an example of how to connect analog output signals In the Quick DataAcq application choose Single Analog Output from the Control menu Select the appropriate module from the Board list box In the Channel list box select analog output channel 0 In the Range list box select the output range of DACO The default is 10 V Enter an output value or use the slider to select a value to output from DACO Click Send to output a single value from analog output channel 0 The application displays the output va
10. In the DAC Output Voltage box select 9 375 V 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 In the DAC Output Voltage box select 9 375 V 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 Note Atany 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 epi ir ee bok e en erc d etg 112 Analog Output SpeciligalioDs Less bees He RA IH Chee CR det e m 114 Tachometer Input 5peclficalons oers 0062660 t hh Re ERO OE EE REPRE ees 115 E Dau Spec capo E AA AAA Rb C eee els 116 Tiger ped HOS DO one ce bie eere E ERE rh Pee e E Hed e poter debo tete ete 117 Master Oscillator Specifications 0 2 0 0i6csete vies a ii Rn 118 Power Physical and Environmental Specifications 0 0000 esses 119 Regulatory Specie aDODE eee ciuis Hoe dee dia ds eink eed ede dg Hle Gerdes 120 Cannector Speciib HE DOS eoo epp eR EE A epe Se P VES e d 121 111 Appendix A
11. Table 16 DT9837 Series Counter Timer Options DT9837 Series Cascading Support SupportsCascading A D D A DIN DOUT C T QUAD 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 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 Using the VIBpoint Framework Application A PRU 82 Running the VIBpoint Framework Application oooococoocorrrccccncrrrrcaco 8
12. 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 both the DT9837 and DT9837A modules In 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 you can allocate a buffer of any size and then fill the buffer with the waveform that you want to output When it detects a software trigger the host computer transfers the entire waveform pattern to the 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 59 Chapter 5 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 a
13. described on page 61 mode 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 63 tachometer counter 1 A D channel 5 described on page 64 and gate counter 2 A D channel 6 described on page 66 Using software specify the channels you want to sample in sequential order When it detects an initial trigger the module simultaneously samples all of the input channels specified in the channel list and converts the analog input data The sampled data is placed in the allocated buffer s and the operation continues until the allocated buffers are filled or until you stop the operation Refer to page 56 for more information about buffers The conversion rate is determined by the frequency of the input sample clock refer to page 52 for more information about the input sample clock Principles of Operation 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
14. a single values operation returns values from the analog input channels as well as from tachometer counter 0 described on page 63 tachometer counter 1 described on page 64 gate counter 2 described on page 66 and the analog output readback channel for the DT9837A described on page 61 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 single 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 trigger source 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 63 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 63 tachometer counter 1 A D channel 5 described on page 64 gate counter 2 A D channel 6 described on page 66 and the analog output readback value A D channel 7
15. and channel 6 corresponds to gate counter 2 d 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 only and channel 7 corresponds to the analog output readback channel Table 9 DT9837 Series Gain Options DT9837 Series Modules A D D A DIN DOUT C T QUAD Programmable Gain Support SupportsProgrammableGain Yes Number of Gains NumberOfSupportedGains 2 1 0 0 0 Gains Available 1 and SupportedGains 10 1 a The D A subsystem is not supported by the DT9837B module 75 Chapter 6 Ranges Table 10 DT9837 Series Range Options DT9837 Series Modules A D D A DIN DOUT C T QUAD Number of Voltage Ranges NumberOfRanges 1 1 0 0 0 0 Available Ranges SupportedVoltageRanges 10 Vb 10V 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 Resolution Table 11 DT9837 Series Resolution Options DT9837 Series Modules A D D A DIN DOUT C T QUAD Software Programmable Resolution SupportsSoftwareResolution Number of Resolutions NumberOfResolutions 1 1 0 0 0 0 Available Res
16. calibrating the module analog input subsystem 108 analog output subsystem 110 running the calibration utility 107 CGLDepth 75 channel list specifying a tachometer input 61 specifying gate counter 2 66 specifying tachometer counter 0 63 specifying tachometer counter 1 64 channel type differential 75 single ended 75 channel gain list depth 75 channels analog input 51 analog output 58 number of 75 clocks analog input 52 analog output 58 base frequency 79 internal 79 maximum external clock divider 79 maximum throughput 79 minimum external clock divider 79 minimum throughput 79 simultaneous 79 135 Index 136 connecting signals analog inputs 35 analog output 36 gate input 38 tachometer input 37 connecting to the host computer 26 connectors Gate Input 125 RJ45 LVDS 121 124 continuous analog input post trigger 73 scan operations 54 continuous analog output 73 continuous counter timer 73 continuous digital I O 73 Control Panel applet 101 conversion modes continuous analog input scan mode 54 continuous analog output 60 single value analog input 53 single value analog output 59 single values analog input 53 waveform generation mode 59 conversion rate 54 counter 0 63 counter 1 64 counter 2 66 counter timer 61 channels 75 clock sources 79 coupling type 52 current source 52 77 customer service 103 D data encoding 56 62 74 data flow modes continuous C T 73 continuous digital input 73 continuous pos
17. enabled You can choose to display data from a subset of the enabled channels The Chart Recorder shows data only from the set of channels that are being recorded to memory Note that you collapse or expand the view of the Chart Recorder using the ll button on the main window e QQm2 88 6h O n 4 82 a Cursor A1 Visible Al Data i Plot Plot data type Voltage Soie Sensor FFT Number 3 V Link Time Series Data Idle 92 Lobos Decidido o AA RAN 3 150000 3 200000 3 250000 3 300000 3 350000 3 400000 3 450000 3 100000 3 100000 3 150000 3 200000 3 250000 3 300000 3 350000 3 400000 3 450000 3 500000 3 550000 3 600000 3 650000 3 700000 3 750000 3 800000 3 850000 Master Ain 0 250 0 Master Ain0 FFT Anh Ah aw A A n ay A Nh VR ATA AAA AA A MIN ODON OAO AAA 1 I IN f 1 MAI ATA NN E ON UU TR T Uy yy vv Uy y y uu y uu viu 3 650000 3 700000 3 750000 3 800000 3 850000 Slave Ain 0 MAA AAA A P 300 0 3500 Slave Ain0 FFT 3 900000 3 950000 4 000000 4 050000 NNUNANINNANAN is i LL TW TE EA T HAART HEEL DU HULU PII ICH EE UE AE EE UNV ouu y wu vv 3 950000 4 000000 4 050000 i y yai n Ul j Using the VIBpoint Framework Application Channel Name The Chart Recorder shows the names of the channels that you enabled when you configured the DT9837 Series module Only data from the list of enab
18. 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 and DT9837B Register Level Programming If you need to change the settings of the Open Layers Control Panel for the DT9837A or DT9837B programmatically you can use the Data Acq SDK function olDiagWriteReg to write to the following registers of the DT9837A or DT9837B module General Control Register 4 Write to this memory location to change the tachometer and gate 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 4 The following example shows how to update the bits of General Control Register 4 on the DT9837A module using the value specified in the RegValueToWrite variable define LOCAL BUS BASE 0x400000 define GENERAL CNTRL REGA4 LOCAL BUS BASE 0x8 olDiagWriteReg m hDev GENERAL CONTROL REGA RegValueToWrite 2 General Control Register
19. sssssssseeseeeeeeeee 67 Synchronizing Acquisition on Multiple DT9837A or DT9837B Modules 68 Chapter 6 Supported Device Driver CapabilitieS 71 Data Flow and Operation Options isssssssssss en 73 Buffering s eed ee a Ra s RR EE d da a 74 Triggered Scan Mode ti bs E a UE Med SM LA IA dL End pus 74 Data Encoding rere AA ees esses dee A 74 Contents Channels TE 75 Galiana Ad ded dade det dese ea ieu dut 75 Rano eS enaere EAM 76 R solution a a xS a A A ete IA e NE E RH ees 76 Thermocouple and RTD Support ssssssssssssses eee eee 77 IEPEISUDDOEE cos E rats ost reat a ipe vh suae E 77 TESTES xh Bie ee SIS Sa o aD A ccu wate eeu 78 Clocks oa test eet Ra bis uM A Ebr eP ene Ue E REA dg UE eA ues 79 Gounter Timers zu IE EES RO ROIG RUE gl MAREE EEN nde TIN a 80 Chapter 7 Using the VIBpoint Framework Application Lese 81 OVEIVIE d H 82 Running the VIBpoint Framework Application 0 0 060 83 Changing the Configuration of Your Module 0 0 00 e eee eee ee 86 Acquire Display and Record Data 0 00000 89 Recording Settings ee lerese EPEE EE EEEE A RR Rd A A gases gad ese e ees 89 Trigger DetHfips soe ees a el D e nd ee SE 91 Chart Recorder oe A A A a 92 Channel Names oetra bneR ub Rb E eeu LEVA UE eda Edu ied de ies 93 Channel Visibility 4 2c 05 aia a ette tid tous 93 Show CUufsOR visere A REFER eee
20. 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 102 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 instructions 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 in a 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 103 Chapter 8 104 Calibration Usme the shbrat om BUMY eee repa wa
21. Choose Freq if you want to plot the data from the counter timer in Hertz You can enter the maximum value for the Y axis in the Maximum expected frequency field Plot Tab The Plot tab along with the Style tab allows you to control how the plots look in the Chart Recorder window You can change the following attributes of the Chart Recorder using the Plot tab For the Plot update rate enter a value between 1 and 50 to indicate how often you want the display to be refreshed per second You can adjust how the plot scrolls to the left using the Smooth scrolling checkbox If Smooth scrolling is checked the plot attempts to scroll after each data point is added However scrolling is limited by the actual update rate For example if the Plot update rate is set to 50 and 100 points are added per second determined by the Recording settings the plot scrolls to the left by 2 samples 50 times per second If the Smooth scrolling checkbox is unchecked the plot does not attempt to scroll after every point is added instead it scrolls after each buffer is plotted The buffer size is set to the FFT size In the Chart Header Text box enter the text that you want to display at the top of the Chart Recorder Under Time domain X axis units select the units for the x axis as either the number of samples 0 to the maximum number of samples acquired or the relative time 0 to the total recording time Style Tab The Style tab along with the P
22. 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 65 Chapter 5 66 Gate Input Features The DT9837A OEM module provides a 4 pin gate input connector for connecting a TTL gate input signal see page 125 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 29 or by writing to the registers of the module as described in Appendix C starting on page 127 The signal that starts the measurement A D sample gate rising edge or
23. Factor Old Average 1 Weighting Factor Based on the information that you enter the software configures the hardware and displays the following configuration settings used by the device The actual sample rate used by the device The actual sample interval used by the device e The actual number of scans to acquire e The actual number of FFTs to calculate 90 Using the VIBpoint Framework Application Trigger Settings Recording Trigger Trigger source Analog Threshold Pos E Threshold Trigger Options Threshold value 1 00 v Type Hardware Software Channel Master Ain 0 Ratio of pre post trigger data to analyze Pre 10 Post 90 The trigger source starts acquisition on the module In multiple device configurations this is the trigger source that starts acquisition on the master module The following trigger sources are supported for the DT9837 Series modules IMMediate A software trigger event occurs immediately when you start acquisition External TTL Pos Edge An external digital TTL trigger event occurs when the device detects a rising edge transition on the signal connected to the Trigger In input This trigger provides a threshold voltage of 2 V with 0 5 V of hysteresis Analog Threshold Pos Edge A positive edge analog threshold trigger event When you choose the analog threshold trigger source the following additional options are available
24. If one of these error conditions occurs the module stops acquiring and transferring data to the host computer 57 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 58 Output conversion mode described on page 59 e Output clocks described on page 58 Output triggers described on page 61 Data format and transfer described on page 62 Error conditions described on page 62 Analog Output Channels The DT9837 and DT9837A modules support one analog output channel through analog output subsystem 0 Note that on the DT9837A module only you can read back the value of the analog output channel through the analog input channel list refer to page 61 for more information A two pole 10 kHz Butterworth filter is applied 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 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 and DT9837A modules is derived from the USB clock to produce the output clock frequency On th
25. MaxFrequency 79 MaxMultiScanCount 74 MaxRetriggerFreq 74 MaxSingleEndedChannels 75 Measure Foundry 17 MinExtClockDivider 79 MinFrequency 79 MinRetriggerFreq 74 multiple modules triggering 67 N number of differential channels 75 gains 75 I O channels 75 resolutions 76 scans per trigger 74 single ended channels 75 voltage ranges 76 NumberOfChannels 75 NumberOfRanges 76 NumberOfResolutions 76 NumberOfSupportedGains 75 Nyquist Theorem 52 O online help 41 Open Layers Control Panel applet 101 operation modes continuous analog input scan mode 54 single value analog input 53 single value analog output 59 single values analog input 53 waveform generation 59 oscillator specifications 118 output clock sources 58 ranges 58 P physical specifications 119 positive threshold trigger 78 post trigger acquisition mode 73 power 27 28 specifications 119 preparing to wire signals 33 Q Quick DataAcq application 17 running 41 quickDAQ 17 R ranges analog input 51 analog output 58 number of 76 recommendations for wiring 33 register level programming DT9837 128 DT9837A 131 DT9837B 131 regulatory specifications 120 resolution analog input 52 137 Index 138 analog output 58 available 76 number of 76 retrigger clock frequency 74 returning boards to the factory 103 RJ45 connector pin assignments 124 specifications 121 RMA 103 S sample clock 52 SDK 17 simultaneous clocking 79
26. Number of scans 5120 Number of FFTs 5 MA NEFEFEEFEEEEEEN f T ILU M ii Il J Hi ll i li l ll IA i il n li itin Y Link Time Series Data 3 100000 3 150000 3 200000 3 250000 3 300000 3 350000 3 400000 3 450000 3 500000 3 550000 3 600000 3 650000 3 700000 3 750000 3 800000 3 850000 3 900000 3 950000 4 000000 4 050000 Slave Ain 0 M Y APP y l Idle Acquisition stopped Processing EUER Figure 19 VIBpoint Framework Application 85 Chapter 7 Changing the Configuration of Your Module You must choose Stop from the Acquisition menu or click the stop button on the main window before you can make changes to your module configuration To change the configuration of your module follow these steps 1 Click the Configuration menu and then click Change Configuration The Change Configuration screen is displayed Channel Enable Channel Name Master 1 Ain 0 Channel Enable Channel Name Tach 0 Channel Enable Channel Name Master 6 Tach Counter Gate Counter Tach Counter Gate Counter 2 Select the channels that you want to enable for acquisition by clicking the Enable checkbox for those channels Only data from enabled channels is included in the analog input data stream 3 Under Channel Name specify a meaningful name to
27. PERF TEE 93 Signal Group ou csset deu er aa da 93 Data Dab 545i ec ok A MEUSE Mut ae Ru etudes 94 Plot Tab xir Dee A A DR OEE 95 Style Tab 3o onde E REG terio e 95 BEIS E ii dada 96 Chart Control sii ain en rent HERE UE DENTAR ERIS DES need 96 Device Status i4 csse iaa 96 Channel Overview ad zoe et ue eH B dite ete dust ue s s 96 Exiting from the VIBpoint Framework Applicati0N oooooooococcocccccccccc 98 Chapter 8 Troubleshooting lesen 99 General Checklist cis eh ale beets a Bale a RR dua USURIS ONUS e s 100 Technical Support 444 Tomo cag hae dee dud ade M eR e uds 102 If Your Module Needs Factory Service 6 6 eens 103 Chapter 9 Calibration llle eee 105 Using the Calibration Utility iss as em eb yeh ey eg ES 107 Calibrating the Analog Input Subsystem 0 00 e eee eee eee 108 Connecting a Precision Voltage Source 6 6 66 108 Using the Auto Calibration Procedure 0 000000 108 Using the Manual Calibration Procedure 0 0000 108 Calibrating the Analog Output Subsystem 66 ee eens 110 Contents Appendix A Specifications ooococooccnonnn nne 111 Analog Input Specifications isses enn 112 Analog Output Specifications een 114 Tachometer Input Specifications sss ees 115 Gate Input Specifications oooococccccoorronccnnr ee enn es 116 Trigger Specifications s 00 sc veg ch ees me oe SG EHDA SOA EERE SEA E
28. Pin 4 Pin 2 Figure 21 Gate Input Connector Table 29 lists the pin assignments for the Gate Input connector on the D19837A OEM module Table 29 Gate Input Connector Pin Assignments Pin Description 1 Gate Input 2 No Connect 3 Digital Ground 4 No Connect 125 Appendix B 126 Os A Register Level Programming DT9837 Register Level Propran Ng o eie we ees e a le eee es 128 DT9837A and DT9837B Register Level Programming 127 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 define 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
29. 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 Principles of Operation Triggering Acquisition on Multiple Modules Note For DT9837A and DT9837B modules you can synchronize acquisition on multiple modules using the RJ45 LVDS synchronization connector described on page 68 The internal clock on the DT9837 module and on the DT9837A and DT9837B modules when the synchronization mode is none see page 68 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 16 When triggered the modules start acquiring data at the same time Using this connection scheme the measurements of one module may n
30. 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 2 The operating system automatically detects the USB module and starts the Found New Hardware wizard DT9837 Series Module USB Ports Host Computer q USB Cable y Figure 2 Attaching the Module to the Host Computer 26 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 the firmware to accept commands b Click Next and or Finish again Note Windows 7 finds 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 tur
31. 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 Using the Manual Calibration Procedure If you want to manually calibrate the analog input circuitry instead of auto calibrating it do the following for each channel 1 From the A D Calibration tab of the calibration utility select the channel that you want to calibrate in the Manual Calibration area 2 For the DT9837A and DT9837B modules enter the sampling frequency that you want to calibrate to in the Sample Frequency text box 108 Calibration 3 Click the Manual Calibration Start button A message appears notifying you to verify that 0 000 V is applied to the channel Note If you do not want the application to continue to read the voltage click Stop 4 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 displa
32. 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 Principles of Operation 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 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 operation
33. 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 9 starting on page 105 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 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 101 Chapter 8 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
34. 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 Using the VIBpoint Framework Application provides information about using the VIBpoint Framework application with the DT9837 Series modules Chapter 8 Troubleshooting provides information that you can use to resolve problems with the DT9837 Series modules and DT9837 Series Device Drivers should they occur Chapter 9 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 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
35. simultaneous sample and hold support 75 single buffer wrap mode 74 single ended channels 35 75 number of 75 single value configuration 53 single value operations 73 analog output 59 single values configuration 53 software trigger 55 61 78 specifications 111 analog input 112 analog output 114 connector 121 environmental 119 gate input 116 master oscillator 118 physical 119 power 119 regulatory 120 tachometer input 115 triggers 117 stopping an operation 55 61 SupportedExcitationCurrentValues 77 SupportedGains 75 SupportedResolutions 76 SupportedVoltageRanges 76 SupportsACCoupling 77 SupportsBinaryEncoding 74 SupportsBuffering 74 SupportsContinuous 73 SupportsDCCoupling 77 SupportsDifferential 75 SupportsInProcessFlush 74 SupportsInternalClock 79 SupportsInternalExcitationCurrentSrc 77 SupportsPosExternalTTL Trigger 78 SupportsPosThreshold Trigger 78 SupportsProgrammableGain 75 SupportsSimultaneousClocking 79 SupportsSimultaneousSampleHold 75 SupportsSingleEnded 75 SupportsSingleValue 73 SupportsSoftwareTrigger 78 SupportsSynchronization 73 SupportsWaveformModeOnly 73 SupportsWrapSingle 74 synchronization modes 73 SynchronizationMode 73 synchronizing tachometer and analog input data 53 T tachometer input 61 63 counter 0 63 counter 1 64 specifications 115 wiring 37 technical support 102 threshold trigger positive 78 throughput maximum 79 minimum 79 transferring data analog input 56 analog outp
36. 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 problem If you still experience problems try using the information in Table 18 to isolate and solve the problem If you cannot identify the problem refer to page 102 Table 18 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 Tran
37. 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 68 for more information 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 Principles of Operation 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 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
38. the calibration utility is running you can calibrate the analog input circuitry either automatically or manually described on page 108 or the analog output circuitry of the module described on page 110 107 Chapter 9 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 49 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 From the A D Calibration tab of the calibration utility select the channel that you want to calibrate from the Type of Calibration drop down list box in the Automatic Calibration area 2 For the DT9837A and DT9837B modules enter the sampling frequency that you want to calibrate to in the Sample Frequency text box 3 Click the Auto Calibration 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
39. 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 Input configuration Minimum pulse width high low 1 Edge sensitive positive trigger LVTTL inputs LVTTL 14 V 1 3 V 0 2 V 33 LA 1 3 uA 30 V Pulled high with 100 kQ resistor 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 117 Appendix A Master Oscillator Specifications Table 24 lists the specifications for the master oscillator on the DT9837A and DT9837B module Table 24 Master Oscillator Specifications DT9837A and DT9837B Feature 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 x85 ppm 118 Specifications Power Physical and Environmental Specifications Table 25 lists the power physical and environmental specifications for the DT9837 Series modules Table 25 Power Physical and Environmental Specifications Dim
40. 112 Analog Input Specifications Table 19 lists the specifications for the analog input subsystem on the DT9837 Series modules Table 19 Analog Input Subsystem Specifications Feature DT9837 Specifications DT9837A Specifications DT9837B Specifications Number of analog input channels 4 single ended simultaneous 4 single ended simultaneous 4 single ended simultaneous Resolution 24 bits 24 bits 24 bits Ranges and gains Gain of 1 10 V 10 V 10 V Gain of 10 1 V 1 V 1 V Gain error Gain of 1 0 02 0 02 0 02 Gain of 10 0 5 0 5 0 5 A D type Delta Sigma Delta Sigma Delta Sigma Maximum sample rate 52 734 kHz 52 734 kHz 105 469 kHZ Minimum sample rate 195 3 Hz 195 3 Hz 195 3 Hz Group delay 39 Sample Frequency 39 Sample Frequency 39 Sample Frequency Pass band at 3 dB 0 49 x Sample Frequency 0 49 x Sample Frequency 0 49 x Sample Frequency at 100 dB 0 55 x Sample Frequency 0 55 x Sample Frequency 0 55 x Sample Frequency Pass band ripple 0 005 dB 0 005 dB 0 005 dB Signal noise typical 106 dB 106 dB 106 dB Total harmonic distortion 0 5 dB using 1 kHz sine wave sampled at 50 kHz 90 dB typical 92 dB typical 92 dB typical Spurious free dynamic range SFDR using a 1 kHz sine wave sampled at 50 kHz 10 V full scale signal 0 5 dB 90 GB typical 92 dB typical 92 dB typical 1 V signal 20 dB 105 dB typic
41. 22 Connector Pin Assignments BIAS L VILIS C OUWIQUDOE o oerte Loeb eee etr qute pee bs eei ate 124 Gate oput C ODDIGQCb uide ear aser dt oe de ee du eee teet adoret ie ob gos 125 123 Appendix B RJ45 LVDS Connector Figure 20 shows the RJ45 LVDS synchronization connector Contact Identification Figure 20 RJ45 LVDS Synchronization Connector Table 28 lists the pin assignments for the RJ45 LVDS synchronization connector on the DT9837A DT9837A OEM and DT9837B modules Table 28 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 124 Connector Pin Assignments Gate Input Connector The 4 pin Gate Input connector is available on the D19837A OEM module only The DT9837B module uses a BNC for the gate input signal Figure 21 shows the orientation of the Gate Input connector on the DT9837A OEM module Pin3 Pin 1 I O exe I l i
42. 29 or by writing to the registers of the module as described in Appendix C starting on page 127 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 A flag 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 described above and the next operation is started automatically The software automatically synchronizes the value of the tachome
43. 3 Changing the Configuration of Your Module cec tme 86 Acquire Display and Record Data scs aceri centi e hr e x ek RE ERR 89 Exiting from the VIBpoint Framework Application sssssseeeeeeeeee 98 81 Chapter 7 Overview 82 The VIBpoint Framework application allows you to acquire and analyze data from up to 4 synchronized DT9837A or D19837B modules or one DT9837 module A 14 day trial version of this application is provided with the module 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 LXI instrument module The VIBpoint Framework application lets you perform the following functions Discover and select your modules Configure all input channel settings such as the enable state AC DC coupling input ranges and edges for tachometer 0 tachometer counter 1 and gate counter 2 as well as the clock and trigger settings e Load save multiple hardware configurations Oneach module acquire data from all channels specified in the input channel list Display acquired data during acquisition e Perform FFTs Fast Fourier Transforms on the acquired analog input data You can select the FFT size and window type and choose one of the following FFT averaging modes if desired Linear Exponential and Peak Hold e Use the Chart Recorder to display a snapshot of data plot the FFT res
44. 37A DT9837A OEM DT9837B Gate Counter 2 is Gate Counter 2 is not Gate Counter 2 measures Gate Counter 2 measures not supported accessible on the module the pulse width of the gate the pulse width of the gate input signal or the phase input signal or the phase between the gate signal and between the gate signal the A D completion signal and the A D completion signal 9 When you are finished configuring the VIBpoint Framework application click Close The latest state is saved and used when the application is next run 10 To save the configuration settings to a file click the Configuration menu and then click Save Configuration 11 Enter a name for the configuration file select the directory in which to save the file and then click Save This file has the extension xml 87 Chapter 7 88 Note If you are using a US version of Windows Vista or Windows 7 the default configuration file with the extension xml is saved to the following location C Program Data NData Translation VIBpoint Framework Config If you are using a US version of Windows XP the default configuration file is saved to this location C Documents and Settings All Users Application Data Data Translation VIBpoint Framework Config You can save numerous configuration settings if desired To load a previously saved configuration click the Configuration menu and then click Load Configuration 12 Start acquisition by clicking St
45. 4 ControlReg4 Offset 0x8 Note The contents of the registers are reset once the application exits Table 32 describes the bits of General Control Register 4 on the DT9837A module that relate to the tachometer and gate settings in the Open Layers Control Panel described on page 29 Table 32 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 131 Appendix C Table 32 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 Falling 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 O 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 ed
46. 45 S External 44 Trigger DT9837A or DT9837B Inputs Slave RJ45 LVDS DT9837A or DT9837B Inputs M Slave RJ45 LVDS DT9837A or DT9837B Inputs i Slave RJ45 LVDS 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 18 Synchronizing Four DT9837A or DT9837B Modules Using the EP386 RJ45 Distribution Panel Shown Using an External Trigger 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 Itis 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 seconds if you try to stop or abort the analog input operation on a slave module that is waiting for a trigger 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
47. 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 129 Appendix C 130 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 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
48. DATA TRANSLATION UM 22417 L DT9837 Series User s Manual Eleventh Edition June 2010 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 O 2006 2010 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 Measure Foundry 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 Interfere
49. DT9837A or DT9837B modules before disconnecting the cable from the RJ45 connectors 69 Chapter 5 70 D Supported Device Driver Capabilities Data Plow and Operation OpHone 4 8 ae ee ce dee rd eret 73 Oron PT Eai 74 Tusppred Gest BIDS octo eoo etr eerte ee e eee eee ene a 74 QUII A a peter act eta epo RC go OR AR old vcl o OR VR oix 75 Channels oooonisunmisas io rr 75 Don UTERE 76 o p DE 76 Thetmocouple and TO CUPP nis cose Ier rRRES oa 77 E E rio EE 77 ji nnn 78 Mo 79 Counter THORS bo A A e AERE eae aa EG E WEE REC E 80 71 Chapter 6 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 29 Table 3 DT9837 Series Subsystems oe secos am oa om oewr cr ow Total Subsystems on Module 12 or2b o 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 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 use D A subsystem 1 to program the threshold value for the analog threshold trigger The tables in this chapter summarize the features available for use with the DT Open Layers for
50. Maximum Retrigger Frequency MaxRetriggerFreq 0 0 0 0 0 0 Minimum Retrigger Frequency MinRetriggerFreq 0 0 0 0 0 0 Data Encoding Table 7 DT9837 Series Data Encoding Options DT9837 Series Modules A D D A DIN DOUT C T 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 74 Supported Device Driver Capabilities Channels Gain Table 8 DT9837 Series Channel Options DT9837 Series Modules Number of Channels NumberOfChannels A D 5 or 8 D A DIN DOUT C T QUAD SE Support SupportsSingleEnded Yes Yes SE Channels MaxSingleEndedChannels DI Support SupportsDifferential DI Channels MaxDifferentialChannels Maximum Channel Gain List Depth CGLDepth Simultaneous Sample and Hold Support SupportsSimultaneousSampleHold pb 7 or 8d Yes Channel List Inhibit SupportsChannelListlnhibit a The D A subsystem is not supported by the DT9837B module b On the DT9837 channels 0 to 3 correspond to the analog input channels channel 4 corresponds to tachometer counter 0 c 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
51. 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 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 72 Supported Device Driver Capabilities Data Flow and Operation Options Table 4 DT9837 Series Data Flow and Operation Options DT9837 Series Modules Single Value Operation Support SupportsSingleValue A D Yes D A Yes DIN DOUT C T 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 SupportsWaveformModeOnly Simultaneous Start List Support SupportsSimultaneousStart Yes Supports Programmable Synchronization Modes SupportsSynchronizati
52. R SGU hasnt e 117 Master Oscillator Specifications 0 6 6 6 118 Power Physical and Environmental Specifications 0 0 0 e eee eee eee 119 Regulatory Specifications esuada seed heh ERR EEE REET HA REDO 120 Connector SpecificatiONS oooococcccoorrroccnnnr eee 121 Appendix B Connector Pin Assignments 0000s e eee o 123 RJ45 LVDS Connector 6 I e ener e ene eee 124 Gate Input Connector cesse oh coer dete os a soda ER RE es ges eb bes 125 Appendix C Register Level Programming 2000eeeeee eee e eens 127 DT9837 Register Level Programming sse 128 Writing to the General Control Register2 ooooooooorcococcccnccccncc 128 Wirting to EEPROM coros RE CORP OE TE pe RE a RE dea med a eade 129 DT9837A and DT9837B Register Level Programming ooooocococcccccccccc o 131 Writing to the General Control Register 4 131 Writing to EEPROM cct Re stat cee ne Pd du Rad eeu d 132 Index A O 135 About this Manual The DT9837 Series includes the DT9837 DT9837A and DT9837B 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 Trou
53. a een epe A Re eae eae 107 Calibrating the Analog Input Subsystem 022 0604 eene ert 108 Calibrating the Analog Output Subsystem 0 e eee eee eee 110 105 Chapter 9 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 Calibration Utility DT9837 A Calibration Utility or DT9837 B 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 input and output subsystems of a DT9837 Series module using the calibration utility 106 Calibration Using the Calibration Utility Start the DT9837 DT9837 A or DT9837 B Calibration Utility as follows 1 Click Start from the Task Bar 2 For the DT9837 module select Programs Data Translation Inc Calibration DT9837 Calibration Utility For the DT9837A module select Programs Data Translation Inc Calibration DT9837 A Calibration Utility The main menu of the calibration utility appears For the DT9837B module select Programs Data Translation Inc Calibration DT9837 B Calibration Utility The main menu of the calibration utility appears 3 Select the module to calibrate and then click OK Once
54. al 115 dB typical 115 dB typical 100 mV signal 40 dB 115 dB typical 115 dB typical 115 dB typical O V signal 115 dB typical 118 dB typical 118 dB typical Data encoding Offset binary Offset binary Offset binary Maximum input voltage without damage Power on 30 V 40 V 40 V Power off 20 V 40 V 40 V Input impedance 1MQ 20 pF 1 MQ 20 pF 1 MQ 20 pF Overvoltage protection power 40 V 40 V 40 V on off Specifications Table 19 Analog Input Subsystem Specifications cont Feature DT9837 Specifications DT9837A Specifications DT9837B Specifications ESD protection Arc 8kV 8kV 8kV Contact 4 kV 4 kV 4kV Current source 4 mA 4mA 4 mA Compliance voltage 18V 18V 18V Current noise 1 kHz bandwidth 5 nA rms 5 nA rms 5 nA rms Current source accuracy 1 0 1 0 1 0 DC offset 1 5 mV 1 5 mV 1 5 mV AC coupling at 3 dB 0 5 Hz 0 1 Hz 0 5 Hz D A Readback in A D Stream A D resolution 16 bits Zero error 15 mV Full scale error 0 296 Clock on input A D Done 42 ns to 83 ns a The conversion rate Sample rate 512 b Cable capacitance of typically 30 pF per foot must be added 113 Appendix A Analog Output Specifications 114 Table 20 lists the specifications for the analog output subsystem on the DT9837 and DT9837A modules Table 20 Analog Output Subsystem Specifi
55. ansion Hub ssssssssss ee 27 Configuring the DT9837 Series Device Drivers ooo oooooccooccccocccccc 29 Chapter 3 Wiring SigNalS o ooococcoooncrn Ih 31 Preparing to Wire Signals si oiii ie i Aa a diaa n 33 Wiring Recommendations sussna suss nrus rnrn e en 33 Wiring Signals to the Module 0 0 00 33 Connecting Analog Input Signals oooocccccccccccccrccror ene 35 Connecting an Analog Output Signal asasasssas sarn eee eee eee 36 Connecting a Tachometer Input Signal 0 06 eee eee 37 Connecting a Gate Input Signal 0 00 38 Chapter 4 Verifying the Operation of a Module o oo ooooomoooo 39 Running the Quick DataAcq Application 0 0 0 41 Testing Single Value Analog Input sssseeeeee eee eee eee 42 Testing Continuous Analog Input 06 6 43 Testing Single Value Analog Output oooooocococccnncronnonnnnnrr 44 Contents Part 2 Using Your Module oooooooooomommmm m m o 45 Chapter 5 Principles of Operation cece eee eee eee eee 47 Analog Input Features o recs penssai oee eee eee nn 51 Analog Input Channels sss rss rsa ccc eee 51 Input Ranges and Gains cce erected o dad s a ed Ren bein ete po tele eats 51 TIEPE Functions its rte ku ette ue eek Weeks ex RAE 52 Input Resolution eie E NA EIS Sa PE PUE a Yea qaa vedere RR 52 Input Clock Source devuelta 52 Analog Input Conversion Modes o oo
56. art from the Acquisition menu or by clicking the Start p button from the main window Using the VIBpoint Framework Application Acquire Display and Record Data Before you start acquisition set up the Recording and Trigger settings You can use the Chart Recorder and Channel Overview windows to view the acquired data This section describes how to acquire display and record data to disk Recording Settings Recording Trigger Maximum frequency to analyze 500 Recording Time Sec 5 12 Actual recording time will be adjusted based on Frequency and FFT Size settings FFT FFT Size 1024 M Window Type None hd Spectral Averaging Averaging Type None Weighting factor 0 9 Acquisition info Sample rate 1000 Hz Sample interval 001 Sec Number of scans 5120 Number of FFTs 5 To specify how data is acquired by the DT9837 Series module configure the following Recording settings Maximum frequency to analyze Specify the bandwidth or span of the input signals that you want to analyze Internally the software multiplies this value by 2 to set the sampling rate of the module This information is shown in the Acquisition info section of the Recording tab Recording Time Sec Specify the amount of time in seconds that you want the application to acquire data before stopping This value must be a multiple of the FFT size The software automatically adjusts this value based on the values y
57. ation Current Source Values SupportedExcitationCurrentValues 004 A 77 Chapter 6 Triggers 78 Table 14 DT9837 Series Trigger Options DT9837 Series Software Trigger Support SupportsSoftwareTrigger A D Yes D A Yes DIN DOUT C T 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 Digital Event Trigger Support SupportsDigitalEventTrigger a This trigger is option is not supported for the DT9837B module b On the DT9837A only you can use the external trigger to trigger D A subsystem 0 c On the DT9837 the threshold level is fixed at 1 0 V On the DT9837A and DT9837B you can program the threshold level from 0 2 V to 9 8 V using the appropriate D A subsystem D A subsystem 1 for the DT9837A or D A subsystem 0 for the DT9837B d This trigger option is not supported on the DT9837B module On the DT9837A only you can use the threshold trigger to trigger D A subsystem 0 you
58. bleshooting 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 or Windows 7 operating system It is assumed that you have some familiarity with data 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
59. can program the threshold level from 0 2 V to 9 8 V using D A subsystem 1 set the value of channel 0 of D A subsystem 1 to a value from 0 to 255 using a single value call Supported Device Driver Capabilities Clocks Table 15 DT9837 Series Clock Options DT9837 Series A D D A DIN DOUT C T 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 Maximum Clock Divider MaxExtClockDivider 1 0 1 0 1 1 Minimum Clock Divider MinExtClockDivider 1 0 1 0 1 1 Maximum Frequency 52 734 kHz or 46 875 kHz or MaxFrequency 105 469 kHz 52 734 kHz 0 0 Minimum Frequency 46 875 kHz or MinFrequency 195 3 Hz 10 kHz 0 0 a The D A subsystem 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 has a maximum frequency of 27 MHz c The DT9837 and DT9837A support a maximum sampling frequency of 52 734 kHz the DT9837B supports 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 a programmable clock frequencies from 10 kHz to 52 734 kHz for D A subsystem 0 79 Chapter 6 Counter Timers 80
60. cations Feature DT9837 Specifications DT9837A Specifications Number of analog output channels 1 1 Resolution 24 bits 24 bits Output range 10V 10 V Data encoding Offset binary Offset binary Output current 1 mA maximum load 10 V across 10 K 3 mA maximum load 10 V across 3 3 K FIFO 8192 Samples total 8192 Samples total ESD protection Arc 8kV 8kV Contact 4 kV 4 kV DC offset 1 5 mV 1 5 mV Gain error 3 0 0 03 2 pole low pass Butterworth filter 10 kHz 10 kHz Time delay typical 34 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 1 kHz 0 0015 0 001596 Internal clock output frequency x 256 output frequency x 512 Minimum sample frequency 46 875 kHz 10 kHz Maximum sample frequency 46 875 kHz 52 734 kHz Pass band ripple typical 0 002 dB 0 454 x output frequency 0 454 x output frequency Pass band typical 0 454 x output frequency 0 49 x output frequency Stop band typical 0 546 x output frequency 0 567 x output frequency Specifications Tachometer Input Specifications Table 21 lists the specifications for the tachometer input on the DT9837 Series modules Table 21 Tachometer Input Specifications Feature DT9837 Specifications DT9837A Specifications DT9837B Specifications Number o
61. corder and Channel Overview windows The choices vary depending on the channel type selected under the Channel Names Analog input and output channels You can choose either Voltage the default choice to plot the voltage data unaltered or Sensor if you want to specify a linear conversion to change the voltage to a sensor value such as acceleration If you select Sensor enter the Unit in which to display the data such as V or g the number of millivolts per unit mV Unit by which to scale the raw voltage and an Offset value to add to the scaled signal e Tachometer channels Choose RPM if you want to plot the data from the tachometer in RPMs When you select this option enter values in the Device Ticks Per Revolution and Device Max RPM fields for your particular tachometer The application can then calibrate to the characteristics of your tachometer and yield a meaningful result Choose Time if you want to plot the data from the tachometer in seconds You can enter the maximum value for the Y axis in the Maximum expected time field Choose Freq if you want to plot the data from the tachometer in Hertz You can enter the maximum value for the Y axis in the Maximum expected frequency field e Counter timer channels Choose Time if you want to plot the data from the counter timer in seconds You can enter the maximum value for the Y axis in the Maximum expected time field 94 Using the VIBpoint Framework Application
62. d used by the control panel 132 Register Level Programming 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 olDiagReadReg0 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 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
63. 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 FFI view e Output a single value from the analog output channel on the DT9837 and DT9837A Note This application does not support configuring AC DC coupling or the excitation current source for IEPE inputs 40 Verifying the Operation of a Module Running the Quick 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 FilesN Data Translation Win32 dtdataacq hlp where C is the letter of your hard disk drive 41 Chapter 4 42 Testing Single Value Analog Input To verify that the module can read a single analog input value do the follo
64. dio 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 or Windows 7 the DataAcq SDK complies with the DT Open Layers standard 17 Chapter 1 DAO Adaptor for MATLAB Data Translation s 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 18 Overview Supported Accessories The following accessory is available for use with the DT9837A and DT9837B modules EP386 panel This RJ45 distribution panel contains four RJ45 connectors that are wired in parallel making it useful when attaching up to four DT9837A or DT9837B modules together Refer to page 69 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 ident
65. e 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 Use software to specify an internal clock source and to specify the clock frequency for the analog output subsystem 58 Principles of Operation 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 DT9837A is 27 MHz Due to the group delay of the Delta Sigma D A converter the DT9837 requires 34 clock pulses and the DT9837A requires 29 clock pulses once the analog output sample clock is started before the first D A conversion is completed Output Conversion Modes The DT9837 and DT9837A modules support single value and waveform analog output operations The DT9837A module also supports 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 61 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
66. e features of the DT9837A 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 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 DT9837 A 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 Software programmable trigger type software external digital trigger or analog threshold trigger to start the analog input operation You can also program the analog input threshold value Anal
67. e list of available devices and you want to connect to it select the name of the module that you want to use from the list of available devices and click Add Information about the device including the model number serial number firmware version driver version and scanning status is displayed Driver Version V6 7 4 9 Device is idle Available Device info queried successfully 83 84 Chapter 7 5 Recommended If you want to rename your DT9837 Series module do the following a Click the Row Selector button for the module b Click the name of the module in the Name column to highlight it and enter a meaningful name to represent each available module Device Family Available Devices Model DT9837 B Advanced DT9837 B 00 10021459 Serial Number 3 DT9837 B 01 3 soni Bon Driver Version V6 7 4 9 Remove Device is idle ox caos Available Device info queried successfully 6 If you are using multiple modules you must set up one module as the clock and trigger master as follows a Click the Row Selector button for the module that you want to be the clock and trigger master b For the clock and trigger master module check the box under the Master column Serial IP Address Mes DT9837 B 00 10021459 3 Note Only one module can be the clock and trigger master If you are using a single module the application automatically con
68. ectors as on the DT9837A module except the analog output connector as shown in Figure 6 _ AD Chan 0 USB Port Status LED A D Chan 1 DT9837B Module P RJ45 LVDS A D Chan 2 A D Chan 3 Gate Input FL Tachometer Input Ext Trigger Figure 6 Connectors on the DT9837B Module The remaining sections of this chapter describe how to attach signals to these connectors 34 Wiring Signals 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 4 mA excitation current source for IEPE inputs it is recommended that you choose AC coupling Refer to page 51 for more information on IEPE inputs Figure 7 shows how to connect analog inputs channels 0 and 1 in this case to the BNC connectors on the DT9837 Series modules DT9837 Series Module Analog In 0 Jr A D Chan 0 Signal A Source nalog In 1 I A D Chan 1 A D Chan 2 A D Chan 3 Tachometer Input Figure 7 Connecting Analog Inputs to a DT9837 Series Module 35 Chapter 3 Connecting an Analog Outp
69. ely otherwise an underrun error results 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 58 for more information about the clock source and frequency Specify the trigger source as any of the supported trigger sources Refer to page 61 for more information about the supported trigger sources 60 Principles of Operation 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 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 Module Only On the DT9837A module you can read back the value of the analog output c
70. ensions of PCB only DT9837 DT9837A DT9837B Feature Specifications Specifications Specifications Power 45 V x0 5 VQ 0 5 A 0 30 VQ 0 5 A 0 30 V O 425 mA Physical Dimensions of enclosure Width 100 mm Length 188 98 mm Height 17 29 mm Width 100 mm Length 146 56mm Thickness 1 57 mm Operating temperature range Storage temperature range Relative humidity Altitude Weight PCB assembly with enclosure 490 74 g PCB assembly 153 09 g Environmental 0 C to 55 C 25 C to 85 C to 95 noncondensing up to 10 000 feet 119 Appendix A 120 Regulatory Specifications Table 26 lists the regulatory specifications for the DT9837 Series modules Table 26 Regulatory Specifications Feature DT9837 Series Specifications Emissions EMI FCC Part 15 EN55022 1994 A1 1995 A2 1997 VCCI AS NZS 3548 Class A Immunity EN 61000 6 1 2001 RoHS EU Directive 2002 95 EG Compliant as of July 1st 2006 Specifications Connector Specifications Table 27 lists the connector specifications for the D19837A DT9837A OEM and DT9837B modules Table 27 Connector Specifications DT9837A DT9837A OEM and Feature DT9837B Specifications RJ45 LVDS Connector Molex part number 44661 0001 Gate Input Connector AMP Tyco part number 5 146282 4 a This connector is available on the DT9837A OEM module only 121 Appendix A 1
71. f channels 1 Resolution 31 bits per channel Input voltage range 30 V Threshold voltage 2 V with 0 5 V hysteresis counter 0 measurements 83 ns resolution 83 ns resolution Maximum input frequency 380 kHz 1 MHz 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 83 ns resolution Clock frequency for tachometer counter 1 measurements 48 MHz 21 ns resolution 48 MHz 21 ns resolution 115 Appendix A Gate Input Specifications Table 22 lists the specifications for the gate input on the DT9837A OEM and DT9837B modules Table 22 Gate Input Specifications DT9837A OEM and DT9837B Feature Specifications Signal type LVTTL Input voltage range for gate input signal 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 116 Specifications Trigger Specifications Table 23 lists the specifications for the trigger on the DT9837 Series modules Feature Table 23 Trigger Specifications DT9837 Specifications DT9837A and DT9837B Specifications Trigger sources Internal software trigger External digital
72. figures the module as the master 7 Optional If you want to remove a module from the selected list of modules click the Row Selector button for the module and then click Remove 8 Once you have added all the DT9837 Series modules you want to use with the application click OK The latest state is saved and used when the application is next run and the main window of the VIBpoint Framework application is displayed Using the VIBpoint Framework Application i ViBpoint Fra File Acquisition Configuration Windows Help gt IM Channel Overview Il A F Recorden ges Channel Name SO wage ara HIE QQ m s BR 4 amp Oj ula nalte Master An 0 a No Maximum frequency to analyze Master Ain O F V Non v 500 Siave Ain 0 Y New y Slave Ain O FFT V No v Recording Time Sec 5 12 T BRE DU T YI T UT n n ili Actual recording time will gt be adjusted based on UU WI T i Frequency and FFT Size JEU DNE ill i Il I DUBII settings FFT nae 3 200000 3 250000 3 300000 3 350000 3 400000 3 450000 3 500000 3 550000 3 600000 3 650000 3 700000 3 750000 3 800000 3 850000 3 900000 3 950000 4 000000 4 050000 1024 Mi Cursor A Master Ain 0 Window Type Visible AI None Data Plot Style Spectral Averaging 5 ase Plot data type PA Voltage Sensor None Weighting factor 0 9 Acquistion info Master AinO FFT Sample rate 1000 Hz Sample interval 001 Sec
73. ge 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 O 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 and DT9837B 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 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 DISABLED Disable
74. gger This trigger source is supported on the DT9837A only An analog threshold trigger event occurs when the signal attached to analog input channel 0 rises above a user specified threshold value from 0 2 V to 9 8 V with 0 1 V of hysteresis Using software specify the trigger source for D A subsystem 0 as a positive threshold trigger Use D A subsystem 1 to program the threshold value 61 Chapter 5 Note 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 68 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 Error Conditions The DT9837 and DT9837A 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 e 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 computer 62 Principles of Operation
75. hannel 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 Output Trigger The DT9837 and DT9837A modules support the following trigger sources for starting analog output operations Software 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 only An external digital TTL trigger event occurs when the module detects a rising edge transition on the signal connected to the Ext Trig BNC connector on the module Using software specify the trigger source for D A subsystem 0 as an external positive digital TIL trigger 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 BNC connector on the slave module Refer to page 68 for more information Analog threshold tri
76. hannels this is the default value Min Displays the minimum value in the buffer for each of the selected channels Max Displays the maximum value in the buffer for each of the selected channels Choose how fast you want the Channel Overview display to be updated Slide the bar to the left for faster update rates or slide the bar to the right for slower update rates If you want the Channel Overview window to appear on top of the other windows of the VIBpoint Framework application click the Keep on top checkbox If this box is unchecked the window will appear behind the other windows of the VIBpoint Framework application If you move or resize the Channel Overview window the application remembers this information and displays the window in the same location the next time you open the application 97 Chapter 7 Exiting from the ViBpoint Framework Application When you are finished using the VIBpoint Framework application exit from the application by selecting the File menu and clicking Exit 98 General Checklist ces Technical Support esses If Your Module Needs Factory Service Troubleshooting 99 Chapter 8 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
77. hreshold level is programmable from 0 2 V to 9 8 V with 0 1 V of hysteresis b Available on the DT9837A OEM version c Available through a BNC connector on the DT9837B module Key Features of the DT9837 The key hardware features of the DT9837 module are as follows e 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 14 Overview Software programmable trigger type software external digital trigger or analog threshold trigger to start the analog input operation Analog output subsystem One 24 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 The key hardwar
78. ify 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 19 Chapter 1 Getting Started Procedure The flow diagram shown in Figure 1 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 23 D Wire Signals see Chapter 3 starting on page 31 Verify the Operation of the Module see Chapter 4 starting on page 39 Figure 1 Getting Started Flow Diagram 20 Part 1 Getting Started Setting Up and Installing the Module uno CET 25 Attaching Modules to the Computer cocer ek dee he heh 26 Configuring the DT983 Series Device Drivers icis eme es 29 23 Chapter 2 Set Up and Install the Module this chapter Wire Signals see Chapter 3 starting on page 31 Verify the Operation of the Module see Chapter 4 starting on page 39 24 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 m
79. inds the device automatically 5 Repeat these steps until you have attached the number of expansion hubs and modules that you require Refer to Figure 3 The operating system automatically detects the USB devices as they are installed DT9837 Series DT9837 Series Module Y S Module Host Computer aaa I Le USB Cable USB Cable H Power Supply a MS Expansion d for Hub Power Supply for Hub DT9837 Series DT9837 Series Module Module USB Cables Figure 3 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 To configure the device driver for the DT9837 DT9837A or DT9837B 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
80. ing is selected for the DT9837 and DT9837A modules and AC coupling is selected for the DT9837B module You can change the IEPE settings using the Open Layers Control Panel applet described on page 29 or by writing to the registers of the module as described on Appendix C starting on page 127 For information on wiring IEPE inputs refer to page 35 Note If you enable the use of the internal 4 mA 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 which 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 the sampling frequency ranges from 195 3 Hz to 105 469 kHz 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
81. issing 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 9 25 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 27 You can unplug a module then plug it in again if you wish without causing damage This process is called hot swapping Your application 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
82. ite to the module to begin conversions Using software specify the trigger source as a software trigger External digital TTL trigger An external digital TIL trigger event occurs when the module detects a rising edge transition on the signal connected to the Ext Trig BNC connector on the module Using software specify the trigger source as an external positive digital TTL trigger 55 Chapter 5 56 Note On the DT9837A and DT9837B 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 BNC connector on the slave module Refer to page 68 for more information Analog threshold trigger For the DT9837 module only an analog threshold 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 trigger source as a positive threshold trigger For the DT9837A and DT9837B modules an analog threshold trigger event occurs when the signal attached to analog input channel 0 rises above a user specified threshold value from 0 2 V to 9 8 V with 0 1 V of hysteresis Using software specify the trigger source as a positive threshold trigger Note Channel 0 does not have to be included in the channel list for the analog threshold trigger to work On the DT9837A and DT9837B modules if you configure the synchronization mode as slave
83. le 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 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 64 Principles of Operation You can specify the following parameters for tachometer counter 1 using the Open Layers Control Panel applet described on page 29 or by writing to the registers of the module as described in Appendix C starting on page 127 e The signal that starts the measurement A D sample rising edge of the tachometer input signal or falling edge of the tachometer input signal Thesignal 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 using the A D sample choose a tachometer edge to stop the measurement Likewise if you choose to stop the measurement using the A
84. led channels is recorded to memory Use the Save chart control to save the recorded data to disk Channel Visibility For each enabled channel listed under the Channel Name column you can control which channels are displayed using the Visible checkbox If a box is checked under the Visible column a graph for the associated channel is displayed in the Chart Recorder If a box under the Visible column is unchecked the graph for the associated channel is not displayed in the Chart Recorder Note Data for all enabled channels is recorded to memory regardless of whether the channel is visible in the Chart Recorder For convenience you can also make all channels visible at once by checking the Visible checkbox under the channel configuration section of this page and then clicking the All button If you do not want any of the channels to be visible clear the Visible checkbox under the channel configuration section of this page and then click the All button Show Cursor You can choose to display a data cursor for each of the enabled channels using the Show Cursor column If a box is checked under the Show Cursor column a data cursor for the associated channel is displayed in the Chart Recorder If a box under the Show Cursor column is unchecked a data cursor for the associated channel is not displayed in the Chart Recorder For convenience you can also display the data cursor for all channels at once by checking the Cursor checkbox
85. lot tab allows you to control how the plots look in the Chart Recorder window You can change the following attributes of the Chart Recorder using the Plot tab Use the Current trace color drop down box to choose a different color for the trace on the Chart Recorder for the currently selected channel Use the Background color drop down box to choose a different color for the background of the Chart Recorder Use the Foreground color drop down box to choose a different color for the foreground axes and label text of the Chart Recorder Use the Grid line color drop down box to choose a different color for the grid lines of the Chart Recorder In the Trace thickness box enter the value between 1 and 5 to set the thickness of the line used by the trace on the Chart Recorder 95 Chapter 7 96 Fast sj Channel i DA 5e FE Channel Display Enable Master Ain 0 Master Tach 0 Slave Ain 0 Slave Gate Counter Master Tach 0 a Slave Ain 0 Bo Data Reduction Method E First Value Average Display Update Rate 7 Keep on top FFTs If the FFT averaging type is None you can use the FFT Number box to scroll through the FFTs that were done for the corresponding analog input channel once data is acquired For example if 10 FFIs were done for the analog input channels and you are interested in looking at FFI number 4 set the FFT number to 4 and the plot for that FFT is displayed in the Chart Recorder If
86. ltiple modules in one of two ways Figure 17 shows how to connect a maximum of two DT9837A or DT9837B modules by daisy chaining them together through the RJ45 connector Figure 18 shows how to connect a maximum of four DT9837A or DT9837B 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 Host PC USB USB Port 2 Device Under Test DT9837A or Inputs DT9837B External Master Trigger RJ45 LVDS DT9837A or Inputs p gt DT9837B Slave Figure 17 Synchronizing Two DT9837A or DT9837B Modules by Daisy Chaining the RJ45 Connectors Shown Using an External Trigger Principles of Operation Host PC USB USB USB Port2 Port3 Port4 Device EP386 Under Test RJ45 Distribution Panel connectors DT9837A or USB wired in parallel DT9837B RJ45 LVD Inputs Master J
87. lue both on the slider and in the text box Part 2 Using Your Module JJ Principles of Operation Analog Input Teure S cereri A A A Pape ae e eae reed 51 Analog Output POES esos ese Denke a rese RS er Aq er Rp e EPOR ade on nad 58 Tachometer Input Beatles oo coded di ii 63 Gate Input POA secrete eee Ote Deed Pep orte eem eee Pee a c d 66 Triggering Acquisition on Multiple Modules s cs sesessie erireetoiensnient a dess 67 Synchronizing Acquisition on Multiple DT9837A or DT9837B Modules 68 47 Chapter 5 48 Figure 12 shows a block diagram of the DT9837 module x 18 V Compliance Voltage 4 mA Current CL Source Cau 1M x1 10 0 5 Hz Analog Input 0 Sigma Deltas 24 Bit AD A Analog Input2 0 5 Hz Qs mA 24 Bit 1 10 e Analog E 190099 Input o3 Hz Qs mA 24 Bit Ap 9 ul 1M x1 10 24 Bit GP ERR aD ARS 1M x1 10 nalog y Input 3 0 5 Hz amp 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 12 Block Diagram of the DT9837 Module Principles of Operation Figure 13 shows a block diagram of the DT9837A module x 18 V Compliance Voltage
88. 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 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 127 for more information Wiring Signals Treparing IO Wire DINE iui n Cep enero A A IUE a Cedex edenda 33 Connecting Analog Input Signals oo erase esee eee eme e a 35 Connecting an Analog Output Signal cere ke eene er 36 Connecting a Tachometer Input Signal sees esee e eee hee eda 37 Connecting a Gate Input Bienal iscessees esee cee ct eee abode ee etd e 38 31 Chapter 3 32 C Set Up and Install the Module see Chapter 2 starting on page 23 UN ul Wire Signals this chapter C Verify the Operation of the Module see Chapter 4 starting on page 39 Wiring Signals Preparing to Wire Signals This section provides recommendations and information about wiring signals to a D19837 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 p
89. nalog 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 Software programmable trigger type software external digital trigger or analog threshold trigger to start the analog input operation You can also program the analog input threshold value RJ45 synchronization LVDS connector for synchronizing acquisition on up to four DT9837B 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 and DT9837B module The DT9837 Series Device Drivers allow you to use a DT9837 DT9837A or DT9837B module with any of the supported software packages or utilities VIBpoint Framework application A 14 day trial version of this application is shipped with the DT9837 Series modules This application described in Chapter 7 lets you do the following Discover and select available DT9837 Series modules Configure your DT9837 Series modules Acquire data from multiple DT9837A DT9837 A OEM and DT9837 B modules Display acquired data during acquisition Perform FFTs Fast Fourier Transforms on the acquired analog input data Useachart recorder
90. nce 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 Communication
91. ned 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 27 Chapter 2 28 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 the firmware to accept commands b Click Next and or Finish again Note Windows 7 f
92. og 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 Chapter 1 16 Output range of 10 V Software programmable trigger type software trigger external digital trigger or analog threshold trigger to start the analog output operation You can also program the threshold value 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 Key Features of the DT9837B The key hardware features of the modules 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 a 4mA current source and 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 a
93. olutions SupportedResolutions 24 24 0 0 0 0 a The D A subsystem is not supported by the DT9837B module 76 Supported Device Driver Capabilities Thermocouple and RTD Support Table 12 DT9837 Series Thermocouple and RTD Support Options DT9837 Series A D D A DIN DOUT C T 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 Supports 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 DT9837 Series IEPE Support Options DT9837 Series A D D A DIN DOUT C T 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 Available Excit
94. on Yes Synchronization Modes SynchronizationMode None Master Slave Interrupt Support SupportsinterruptOnChange Output FIFO Size FifoSize 8K 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 supports continuous analog output operations in addition to waveform mode 73 Chapter 6 Buffering Table 5 DT9837 Series Buffering Options DT9837 Series Modules A D D A DIN DOUT C T 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 DT9837 Series Triggered Scan Mode Options DT9837 Series Modules A D D A DIN DOUT C T QUAD Triggered Scan Support SupportsTriggeredScan Maximum Number of CGL Scans per Trigger MaxMultiScanCount 1 0 0 0 0 0
95. oocccocccccoc cece eee eee 53 Single Value Operations isssssss nn 53 Single Values Operations ooooooooococcocrrrr nen 53 Continuous Scan Mode 0 ccc een 54 Input THe Pers hiss es ies A P esa qe epus 55 Data Format and Ir nsfet mes grasse nasse VA Ri Rn Minute RC Ree ae 56 Error COMCUMONS nis raaes A DA E AR IG ER ta e RE n d 57 Analog Output Features s cs sese se e eee e se a e e ee ee ene 58 Analog Output Chanels ips precei p n er en nei E n 58 Output Ranges and Gains oooocococconcccorrcnn rr 58 Output Resol iii es rete Re yi e GN e ees ed ee 58 Output Clocks uite sese rn aan utu a cmd 58 Output Conversion Modes nss ranr 6 ccc rr 59 Single Value Mode eos de Re e a Re ue y ye ye ete 59 Waveform Generation Mode 00 cece e 59 Continuous Analog Output Operations 6 66 60 Reading the Analog Output Value in the Analog Input Data Stream DT9837A Module Only cestos iaa E AE E RU RE Str lette RR 61 Output Mig sete ui saa ed eee e toc i t PCR bcd cr PO gae d a eco re 61 Data Format and Wwanster esr Rn Dep E qa I HUE ada 62 Error Conditions i5 ee E Mo e t eb ur sub ed 62 Tachometer Input Features lisse enn 63 Frequency or Period Measurements Tachometer Counter 0 o o oooooooommo o 63 Phase Measurements Tachometer Counter 1 00 0 e eee eese esee 64 Gate Input Features EL DUAE IOS et dne teet a ite a teda 66 Triggering Acquisition on Multiple Modules
96. ot be synchronous with the measurements of another module due to logic delays in the clocking and USB circuitry Device Under Test External Trigger Inputs DT9837 Series 1 Inputs DT9837 Series 2 Host PC USB USB USB Port1 Port2 Portn Inputs DT9837 Series n Figure 16 Triggering Multiple Modules Using an External Trigger Source 67 Chapter 5 Synchronizing Acquisition on Multiple DT9837A or DT9837B Modules 68 DT9837A and DT9837B modules provide an RJ45 LVDS synchronization connector that you can use to connect and synchronize multiple DT9837A or DT9837B 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 BNC connector or the analog threshold trigger on the slave module in this configuration When configured as none the default mode the DT9837A or DT9837B module uses the USB clock instead of the RJ45 synchronization connector The synchronization mode remains set until changed or until the application exits You can connect mu
97. ou enter for Maximum frequency to analyze and the FFT size 89 Chapter 7 e FFT Size Specify how many data points are used to generate the FFTs for the analog input channels Window Type Specify the type of windowing function to use for the FFI Hamming Hanning Bartlett Blackman or None e Averaging Type If you want to average FFTs rather than showing an FFT for each scan choose one of the following spectral averaging modes otherwise choose None Linear With linear averaging data from each FFT is averaged with the data from the other FFIs all data contributes equally to the average Exponential With exponential averaging new FFT data is weighted differently than older FFT data You specify the weighting factor to apply which either increases or decreases the effect of the new FFT data on the average This is a continuous averaging mode PeakHold With PeakHold averaging each new FFT data point is compared with the current FFT data point and the highest amplitude peaks from each FFT are retained This is a continuous operation that combines the results of several measurements into a final FFT measurement Weighting Factor If you choose Exponential as the spectral averaging type enter the weighting factor to apply The weighting factor either increases or decreases the effect of new FFT data on the resultant average using on the following formula Result New FFT Data Weighting
98. ower 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 signals 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 4 A D Chan 0 USB Port AD enan DT9837 Module Status LED D A D Chan 2 r D A Chan 0 A D Chan 3 Tachometer Input Ext Trigger Figure 4 Connectors on the DT9837 Module The DT9837A module provides all of these connectors and an additional RJ45 LVDS connector for connecting multiple DT9837A modules as shown in Figure 5 33 Chapter 3 Ras USB Port Status LED AD enam DT9837A Module D EN RJ45 LVDS A D Chan 2 A D Chan 3 D A Chan 0 A Tachometer Input Ext Trigger _ Gate Input Connector on the DT9837A Module Only Figure 5 Connectors on the DT9837A Module The DT9837B module provides all of the conn
99. 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 52 Specify the trigger source as any of the supported trigger sources refer to page 55 Figure 15 illustrates continuous scan mode using a channel list with five entries channel 0 1 2 3 and 4 In this example data is acquired simultaneously on all channels on each clock pulse of the input sample clock Data is acquired continuously until all the queued buffers have been filled or you stop the operation Chan 4 Chan 4 Chan 4 Chan 4 Chan 3 Chan 3 Chan 3 Chan 3 Chan 2 Chan 2 Chan 2 Chan 2 Chan 1 Chan 1 Chan 1 Chan 1 Chan 0 Chan 0 Chan 0 Chan 0 w LST LS Sample Clock Data is acquired continuously Initial trigger event occurs Figure 15 Continuous Scan Mode Input Triggers A trigger is an event that occurs based on a specified set of conditions Acquisition starts when the module detects the initial trigger event and stops when either all the buffers that have been queued to the subsystem have been filled or you stop the operation The DT9837 Series modules support the following trigger sources for starting analog input operations Software trigger A software trigger event occurs when you start the analog input operation the computer issues a wr
100. represent each channel if desired 4 For analog input channels configure the input signal range for each channel as 10 V or 1 V 86 Using the VIBpoint Framework Application 5 For analog input channels configure the following IEPE settings 4mA current source Enable use of the 4 mA current source by checking the Current Source checkbox or disable use of the 4 mA current source by unchecking the Current Source checkbox Coupling type Select AC for AC coupling or DC for DC coupling 6 For the tachometer 0 select which period of the tachometer input signal CT 0 for the DT9837 Series to measure Rising Measures from the rising to rising edge of the tachometer input signal Falling Measures from the falling to falling edge of the tachometer input signal Note On the DT9837 the period of the tachometer input signal is not programmable it is always measured from rising to rising edge 7 For tachometer counter 1 select the signal edge that will start and stop the measurement Tach Falling Tach Rising or A D Complete Note that this counter is not supported on the DT9837 8 For gate counter 2 select the signal edge that will start and stop the measurement Gate Rising Gate Falling or A D Complete Note that this counter is used differently depending on the module as shown in Table 17 Table 17 Use of Gate Counter 2 on the DT9837 Series Modules DT9837 DT98
101. rroneously 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 as well as the data tachometer counter 0 On the DT9837A and DT9837B module you can also acquire data from tachometer counter 1 and gate counter 2 Additionally the DT9837A allows you to read the value of the analog output readback channel Refer to Analog Input Conversion Modes on page 53 for more information on specifying and reading data from these channels 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 51 Chapter 5 52 IEPE Functions Applications that require accelerometer 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 You can enable or disable the use of a 4 mA internal excitation current source By default the excitation current source is disabled Coupling type You can select whether AC coupling or DC coupling is used By default DC coupl
102. rtment is available to provide technical assistance Refer to Chapter 8 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 b eerte oen ee e eei Fc soe Wee Ere ck 14 supported SOMWAIRS sssi csser Re rs rea n pud 17 Supported Accessories ccoo resti rerebub erig re gd er E E Ene 20 Cotos Died PROCES Linee cete bres a A be fus 20 13 Chapter 1 Hardware Features The DT9837 DT9837A and DT9837B 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 Feature DT9837 DT9837A DT9837B Maximum A D Throughput 52 734 kHz 52 734 kHz 105 469 kHz A D Threshold Trigger Fixed Programmable Programmable Number of Tachometer Counters 1 2 C T 0 and 1 2 C T 0 and 1 Number of Gate Inputs 0 1 C T 2 1 C T 2 Number of Analog Output 1 1 0 Channels Analog Output Readback No Yes No Capability Analog Output Trigger Types Software trigger only Software trigger None external digital trigger or analog threshold trigger RJ45 Synchronization Connector No Yes Yes a On the DT9837 the threshold level is fixed at 1 0 V On the DT9837A and DT9837B the analog t
103. s 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 ooococcoocconcnoc ehh nnn 9 Intended Audience ceder pe beber ERE da ee b ese ER ee 9 How this Manual is Organized sssssssss eh 9 Conventions Used in this Manual ooooococcoccocccnc eee 10 Related Information 2I o eee ete ak Fo se pte oe Te ones 10 Where To Get Help ia eee e tesis E sia mes dese cce da ida ul bed pass 11 Chapter 1 Overview ooooooccccon Rh n n hn 13 Hardware Features i cscs fi Le eC RUE Yer tea reb ge ence e p e eR 14 Key Features of the DT9837 isses nnn 14 Key Features of the DT9837A 1 0 0 eee eee eee eee ee 15 Key Features of the DT9837B 0000s 16 Supported Software Arsia edini ete cree e Pra ea e d Na bebe PO ia ia 17 Supported Accessories riers nnn 19 Getting Started Procedure moriens iie draa ne a a eens 20 Part 1 Getting Started i cin ta ee ew ere ne aw ee wae ee eee 21 Chapter 2 Setting Up and Installing the Module cece ee eens 23 Unpacking c eB cree A pla erue ea AIRS Sibel DECIR gre ted 25 Attaching Modules to the Computer sssssssss nh 26 Connecting Directly to the USB Ports eess e 26 Connecting to an Exp
104. s Continuous Specify WrapSingleBuffer as True to use a single buffer Specify the clock source as internal and specify the clock frequency Refer to page 58 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 FIFO 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 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 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 Note Make sure that the host computer transfers data to the output channel list fast enough so that the list does not empty complet
105. s 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 63 tachometer counter 1 described on page 64 gate counter 2 described on page 66 or the analog output readback channel described on page 61 using a standard single value operation To read these values specify the channels as part of the analog input channel list using continuous scan mode described on page 54 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 53 Chapter 5 54 Note For the DT9837 a single values operation also returns a valid value from tachometer counter 0 analog input channel 4 described on page 63 For the DT9837A or DT9837B
106. sing the A D sample choose a tachometer edge to start the measurement 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 For the DT9837A OEM module and DT9837B modules only 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 66 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 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 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
107. slation for technical support refer to page 102 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 119 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 3 100 Troubleshooting Table 18 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
108. t trigger 73 single value 73 waveform stored in FIFO only 73 data format and transfer analog input 56 analog output 62 DataAcq SDK 17 DC coupling 77 device drivers 17 29 differential channels 75 digital trigger 55 61 DT Open Layers for NET Class Library 17 E encoding data 56 62 environmental specifications 119 EP386 panel 19 68 69 errors analog input 57 analog output 62 excitation current source 52 available 77 internal 77 expansion hub 27 external clock divider maximum 79 minimum 79 external digital trigger 55 61 positive TIL 78 F factory service 103 features 14 FifoSize 73 formatting data analog input 56 analog output 62 frequency analog input operations 52 base clock 79 internal A D clock 79 internal A D sample clock 79 internal C T clock 79 internal retrigger clock 74 G gain 51 actual available 75 analog output 58 number of 75 programmable 75 gate input counter 2 66 pin assignments 125 specifications 116 121 wiring 38 group delay 53 59 Index H hardware features 14 help online 41 hot swapping 26 j IEPE features 52 inprocess buffers 74 input channels 51 configuration single ended 35 ranges 51 resolution 52 internal clock 79 internal excitation current source 77 interrupts 73 L LabVIEW 18 LED 26 27 LVDS connector pin assignments 124 specifications 121 LV Link 18 M master oscillator specifications 118 MaxDifferentialChannels 75 MaxExtClockDivider 79
109. ter 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 63 Chapter 5 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 123738 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 Frequency of a signal pulse the number of periods per second You can calculate the frequency as follows Frequency 12 MHz Number of counts 1 where 12 MHz is the internal counter timer clock frequency For examp
110. to display snapshot or snapshots of data and log it to disk for later analysis Usethe channel overview to view data from your instrument module as a digital display 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 it to disk for later analysis Measure Foundry An evaluation version of this software is included or provided via a link on the Data Acquisition OMNI CD Measure Foundry is a drag and drop test and measurement application builder designed to give you top performance with ease of use development Order the full development version of this software package to develop your own application using real hardware 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 Stu
111. 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 Current Source select Enabled to enable the 4 mA current source or Disabled to disable the 4 mA current source Note If you enable the use of the internal 4 mA excitation current source it is recommended that you choose AC coupling Refer to page 35 for more information on wiring IEPE inputs 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 module the starting edge is programmable either rising or falling See page 63 for more information For the DT9837 skip to step 11 For the DT9837A and DT9837B 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
112. ults from the selected analog input channels and log the data to disk in a tab separated file Open recorded data in Excel for further analysis e Use the Channel Overview window to view the data from your device as a digital display You can customize many aspects of the acquisition display and recording functions to suit your needs including which channels are recorded are displayed in the Chart Recorder and Channel Overview windows which units to use for the data such as voltage frequency or time the frequency of your input analog input signals and the trigger type used Using the VIBpoint Framework Application Running the VIBpoint Framework Application To run the VIBpoint Framework application perform the following steps 1 Click Start gt Programs gt Data Translation Inc gt VIBpoint Framework gt VIBpoint Framework Application The Device Selection screen is displayed Device Family DT8837 DT9837 A ane Advanced DT9837 Serial Number 3 a Driver Version V6 7 4 9 ox coma Available Device info queried successfully 2 Select DT9837 DT9837A or DT9837B from the Device Family list 3 By default the application discovers all modules that are available for the selected Device Family and displays their names in the drop down list If you want to refresh this list to determine if other modules are available click Refresh 4 If your module is included in th
113. under the channel configuration section of this page and then clicking the All button If you do not want to display the data cursor on any channel clear the Cursor checkbox under the channel configuration section of this page and then click the All button You can enable the capability of moving the data cursor using the data cursor chart control Various options are available for changing the cursor style line style and cursor color Refer to the online help for more information Signal Group You can choose to display multiple signals in the same band by assigning the same Signal Group letter to them For each signal in the time domain you can specify one of the following values for the Signal Group None A B C D E or F Likewise you can specify one of these values for the signals in the frequency domain If you specify None the signal is displayed in its own band 93 Chapter 7 For example to see the data from analog input signals 1 and 2 in the time domain in the same band you could set the Signal Group for both channels to letter A If two channels have a different plot data type that is one is voltage and the other is a sensor two Y axes are displayed for the band Note that the Signal Group letter is shown in the legend beneath the x axis 4 600000 4 700000 Group A Master Ain 0 Slave Ain 0 Data Tab The Data tab options allow you to select the units in which the data is plotted in the Chart Re
114. ut 62 triggered scan number of scans per trigger 74 retrigger frequency 74 triggering acquisition on multiple modules 67 triggers analog input 55 analog threshold 56 61 external 55 61 external positive digital 78 positive analog threshold 78 software 55 61 78 specifications 117 troubleshooting procedure 100 technical support 102 troubleshooting table 100 TTL trigger 55 61 U unpacking 25 USB cable 26 27 Index USB expansion hub 27 V VIBpoint Framework Application running 83 VIBpoint Framework application 17 acquiring data 89 Channel Overview window 96 Chart Recorder 92 configuring 86 displaying data 89 exiting 98 features 82 recording data 89 recording settings 89 trigger settings 91 Visual Basic for NET programs 17 Visual C programs 17 voltage ranges 51 76 number of 76 W wiring signals 33 analog inputs 35 analog output 36 gate input 38 preparing 33 recommendations 33 tachometer input 37 writing programs in C C 17 Visual Basic NET 17 Visual C 17 139 Index 140
115. ut Signal The DT9837 and DT9837A modules provide one analog output channel with an output range of 10 V Figure 8 shows how to connect an analog output signal to the DT9837 or DT9837A module DT9837 or DT9837A Module USB Port LED D Analog Out 0 D A Chan 0 a HH Ext Trigger Note that the BNC automatically connects the Analog Ground signal appropriately Figure 8 Connecting an Analog Output Signal to a DT9837 or DT9837A Module 36 Wiring Signals Connecting a Tachometer Input Signal You can connect a 30 V tachometer input signal to the tachometer input BNC on a DT9837 Series module as shown in Figure 9 Note In software you can read tachometer measurements as part of the analog input channel list Refer to page 63 for more information on tachometer measurements DT9837 Series Module A D Chan 0 A D Chan 1 A D Chan 2 A D Chan 3 Tachometer In 0 Signal Source H Tachometer Input Figure 9 Connecting a Tachometer Input Signal to a DT9837 Series Module 37 Chapter 3 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 10 shows how to connect a TTL gate input signal to the DT9837 A OEM module DT9837A OEM Module
116. want to read the previous measurement value if the new measurement value is not yet complete c Fromthe 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 measurement 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 29 Chapter 2 30 9 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 64 for more information Configure the Tach CT1 measurement parameters as follows 10 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 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 u
117. wing 1 MSY gh Go l0 Connect a voltage source such as a function generator to analog input channel 0 on the DT9837 Series module Refer to page 35 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 the 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
118. yed in the A D Value window 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 A D Value is 0 000 V 5 Adjust the gain as follows a Verify that 49 375 V is applied to the channel that you want to calibrate The current voltage reading for this channel is displayed in the A D Value window 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 A D Value is 9 3750 V 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 Once you have finished this procedure continue with Calibrating the Analog Output Subsystem 109 Chapter 9 110 Calibrating the Analog Output Subsystem This section describes how to use the calibration utility to calibrate the analog output subsystem of a DT9837 or DT9837A module To calibrate the analog output circuitry you need to connect an external precision voltmeter to analog output channel 0 of the DT9837 or DT9837A 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 module
119. you want to see the actual analog input data that corresponds to a particular FFT number click the Link Time Series Data checkbox The data plot for the corresponding analog input channels is then displayed for the selected FFT number Chart Controls The toolbar of the Chart Recorder provides a number of controls for viewing the data including scrolling and zooming as well as printing and saving the data Refer to the online help for more information about using the controls provided with the Chart Recorder Device Status The status of the device is shown at the bottom of the Chart Recorder Channel Overview The Channel Overview displays the data from your modules in numerical form Open the Channel Overview by selecting the button on the Main screen The Channel Overview screen is displayed Slow Using the VIBpoint Framework Application Selectthe channels that you want to be visible on the right side of the window by clicking to the right of the green channel indicator You configure the channel names using the Change Configuration menu option If display is enabled the channel indicator is bright green if display is disabled the channel indicator is dark green You can select from the following data reduction methods First value Displays the first value in the buffer for each of the selected channels Average Displays the average value in the buffer for each of the selected c

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