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National Instruments SC Express PXIe-4330, Процедура калибровки

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PXIe-4330/4331 Calibration Procedure

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© National Instruments

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15

10. If calibrating a PXIe-4331, repeat steps 2 through 9 using a sample rate of 102.4 kHz.
11. Repeat steps 1 through 10 for each channel you want to verify.

Shunt Quarter-Bridge Calibration Accuracy Verification

This section provides instructions for verifying the PXIe-4330/4331 shunt quarter-bridge 
calibration accuracy. Table 10 shows all settings for the PXIe-4330/4331. Throughout the shunt 
quarter-bridge calibration accuracy verification, use Table 26 to determine if the module is 
operating within its specified range. If the module is not operating within the specified values, 
refer to the 

Worldwide Support and Services

 section for assistance in returning the 

PXIe-4330/4331 to NI. 

Complete the following steps to test the accuracy of the module shunt quarter-bridge calibration.
1.

Configure the switch modules to connect to the channel you want to verify. Refer to Table 5 
for the specific switch column and row configuration. The connection paths are shown in 
Figure 14 in 

Appendix A: Connection Path Details

.

Note

Only one channel can be connected to the calibrator at a time.

2.

Set the calibrator output for 2-wire compensation (COMP 2-wire). This automatically 
compensates for the lead wire resistance in series with the HI and LO terminals of the 
calibrator.

3.

Set the calibrator resistance output to 120

Ω

, 350

Ω

, or 1000

Ω

, depending on the 

quarter-bridge configuration you want to verify. This must match the configuration setting 
made in step 7.

4.

Set the calibrator to operate mode (OPR).

5.

Create the DAQmx task.

6.

Create and configure an AI Bridge (V/V) channel.

7.

Configure the properties for the acquisition as described in Table 10.

Table 5.  

Shunt Quarter-Bridge Calibration Accuracy Verification

Channel

S

witch 1

0

r1->c0,r0->c1,r1->c15,r3->c16,r0->c17,r3->c18

1

r1->c0,r0->c1,r1->c20,r3->c21,r0->c22,r3->c23

2

r1->c0,r0->c1,r1->c25,r3->c26,r0->c27,r3->c28

3

r1->c0,r0->c1,r1->c30,r3->c31,r0->c32,r3->c33

4

r1->c0,r0->c1,r1->c35,r3->c36,r0->c37,r3->c38

5

r1->c0,r0->c1,r1->c40,r3->c41,r0->c42,r3->c43

6

r1->c0,r0->c1,r1->c45,r3->c46,r0->c47,r3->c48

7

r1->c0,r0->c1,r1->c50,r3->c51,r0->c52,r3->c53

Содержание SC Express PXIe-4330

Страница 1: ...Connect the Calibration and Switch Cables 8 Connect the DMM and Multifunction Calibrator Cables 10 Verification Procedures 11 Gain Accuracy Verification 11 Input Offset Verification 14 Shunt Quarter...

Страница 2: ...writing your calibration utility with NI DAQmx You can download the latest version of these documents from the NI Web site at ni com manuals The NI SC Express 4330 4331 Installation Guide and Termina...

Страница 3: ...ng 6 ppm of range for the 10 V and 1 V ranges and 4 wire resistance measurement capability with resistance accuracy of 80 ppm or better of reading 6 ppm range for the 100 k range Chassis PXIe 1062Q If...

Страница 4: ...depending on the manufacturer Please refer to the equipment s Operators Manual for specified warm up time To meet Fluke 5520A specifications zero the Calibrator every 7 days or when the Calibrator amb...

Страница 5: ...to ensure that the module is working properly Note When a module is configured with MAX it is assigned a module name Each function call uses this module name to determine which DAQ module to calibrat...

Страница 6: ...Figure 3 Rear Connectors 1 SWITCH 1 2 SWITCH 2 3 DEVICE UNDER TEST 1 DMM 2 2 DMM 1 3 CALIBRATOR CAL 4330 2 wire 4x64 Switch 2 wire 4x64 Switch PXIe 4330 or PXIe 4331 HI DMM 2 LO SENSE HI SENSE LO HI L...

Страница 7: ...and tighten the four rack mounting screws that are included with the CAL 4330 If the chassis is not already installed in the rack optional complete the following steps 1 Attach the PXIe chassis rack...

Страница 8: ...own in Figure 5 3 Connect the female end of the calibration cable to the PXIe 4330 4331 and tighten the two jack screws to 0 90 N m 8 0 lb in as shown in Figure 5 1 CAL 4330 2 PXI Chassis 3 PXIe 4330...

Страница 9: ...nnecting the Switch 1 Cable NI PXIe 1062Q NI PXIe 1062Q CO OL ING CL EA RA NC E AN D FA N FIL TE R MA INTE NA NC E RE QU IRED SE E MA NU AL CO OL ING CL EA RA NC E AN D FA N FIL TE R MA INTE NA NC E R...

Страница 10: ...f the CAL 4330 to another PXI 4071 as shown in Figure 9 Figure 9 DMM 2 1 CAL 4330 2 PXI 4071 1 CAL 4330 2 PXI 4071 HI LO 300 V MAX CAT II HI LO AUX I O 1 A 250 V MAX 300 V MAX CAT II 5 V MAX AMPS INPU...

Страница 11: ...vides instructions for verifying the PXIe 4330 4331 gain accuracy specifications Table 8 shows all the settings for the PXIe 4330 4331 Throughout the gain accuracy verification use Tables 12 through 2...

Страница 12: ...ge beginning with the 0 V V nominal value 350 indicated in Table 12 for excitation voltages 2 5 V or Table 13 for excitation voltages 2 5 V for fs 51 2 kHz Use Tables 14 through 23 for fs 51 2 kHz and...

Страница 13: ...than 0 V V using the results you recorded in step 15 19 Compare the compensated result Vr for each value to the Upper Limit V V and Lower Limit V V values in Table 12 for excitation voltages 2 5 V or...

Страница 14: ...in Table 8 5 Start the task 6 Read 10 000 samples of data if fs 25600 Read 40 000 samples of data if fs 102400 7 Average the readings that you acquired and record the result 8 Clear the task 9 Compar...

Страница 15: ...c switch column and row configuration The connection paths are shown in Figure 14 in Appendix A Connection Path Details Note Only one channel can be connected to the calibrator at a time 2 Set the cal...

Страница 16: ...lculation using the results you recorded in steps 12 and 18 where ResultSCE result with shunt calibration enabled in step 18 ResultSCD result with shunt calibration disabled in step 12 21 Compare the...

Страница 17: ...Enable shunt calibration for the channel Configure the properties for the acquisition as described in Table 9 5 Set the shunt calibration resistance for the channel using the Shunt Cal A Resistor Val...

Страница 18: ...task 3 Create and configure an AI Bridge V V channel 4 Configure the properties for the task configuration as described in Table 8 Note Set the sample rate and samples to read to 25 600 and 10 000 re...

Страница 19: ...2 0 2 5 2 75 3 3 5 0 7 5 or 10 0 Use the excitation value and rate that corresponds to the configuration being verified Read 10 000 samples when verifying at the 25 600 Hz rate Read 40 000 samples whe...

Страница 20: ...guration The connection paths are shown in Figure 17 in Appendix A Connection Path Details Vex Source Internal Vex Value 2 5 Table 10 Configuration Settings for Quarter Bridge Operation Property Value...

Страница 21: ...and Offset Adjust Switch Settings Channel Switch 1 Switch 2 0 r0 c0 r1 c1 r0 c2 r1 c3 r2 c4 r2 c5 r3 c6 r3 c7 r3 c16 r0 c0 r1 c1 r0 c2 r1 c3 r0 c14 r1 c16 1 r0 c0 r1 c1 r0 c2 r1 c3 r2 c4 r2 c5 r3 c6 r...

Страница 22: ...e results Note The calibration software uses the ratio of the measurements from the DMMs as a ratiometric reference signal Using two DMMs allows measurement of the excitation voltage and the input vol...

Страница 23: ...e DAQmx Adjust 433x Calibration VI LabVIEW Block Diagram NI DAQmx Function Call Call DAQmxAdjust433xCal with the following parameters calHandle calHandle refVoltage DMM Reading 1 refExcitation DMM Rea...

Страница 24: ...its Tables 12 through 28 list the test limits that the PXIe 4330 4331 should meet if it has been one year between calibrations The following definitions describe how to use the information from the te...

Страница 25: ...380 80 Radj 0 0210728 44 000 0 0 0210833 0 0210623 43 978 0 44022 0 385 00 Radj 0 0238095 50 000 0 0 0238214 0 0237976 49 975 0 50025 0 Table 13 PXIe 4330 4331 Gain Accuracy Verification Test Limits f...

Страница 26: ...996 155 000 0 0 0671734 0 0670258 154 829 5 155 170 5 509 60 Radj 0 0928339 228 000 0 0 0929360 0 0927318 227 749 2 228 250 8 Table 15 PXIe 4331 Gain Accuracy Verification Test Limits fs 51 2 kHz Vex...

Страница 27: ...0 0670996 155 000 0 0 0671499 0 0670492 154 883 8 155 116 3 509 60 Radj 0 0928339 228 000 0 0 0929035 0 0927643 227 829 0 228 171 0 Table 17 PXIe 4331 Gain Accuracy Verification Test Limits fs 51 2 kH...

Страница 28: ...70996 155 000 0 0 0671432 0 0670560 154 899 3 155 100 8 509 60 Radj 0 0928339 228 000 0 0 0928942 0 0927735 227 851 8 228 148 2 Table 19 PXIe 4331 Gain Accuracy Verification Test Limits fs 51 2 kHz Ve...

Страница 29: ...Radj 0 0210728 44 000 0 0 0210929 0 0210527 43 958 0 44 042 0 385 00 Radj 0 0238095 50 000 0 0 0238323 0 0237868 49 952 3 50 047 7 Table 21 PXIe 4331 Gain Accuracy Verification Test Limits fs 51 2 kH...

Страница 30: ...0210728 44 000 0 0 0210875 0 0210580 43 969 2 44 030 8 385 00 Radj 0 0238095 50 000 0 0 0238262 0 0237929 49 965 0 50 035 0 Table 23 PXIe 4331 Gain Accuracy Verification Test Limits fs 51 2 kHz Vex 10...

Страница 31: ...V 0 625 268 8 268 8 1 0 168 0 168 0 1 5 112 0 112 0 2 0 84 0 84 0 2 5 67 2 67 2 2 75 39 3 39 3 3 3 32 7 32 7 5 0 21 6 21 6 7 5 14 4 14 4 10 0 10 8 10 8 Table 25 PXIe 4331 Input Offset Accuracy Verific...

Страница 32: ...8 299 82 Lower Limit V V 896 59 598 08 299 22 Upper Limit V V 900 18 600 48 300 42 350 Nominal Value V V 2 611 29 1 743 90 873 47 Lower Limit V V 2 606 07 1 740 41 871 72 Upper Limit V V 2 616 51 1 74...

Страница 33: ...t Limits Table 28 PXIe 4330 4331 Excitation Voltage Verification Test Limits Excitation V Lower Limit V Upper Limit V 0 625 0 539 0 711 1 0 0 912 1 088 1 5 1 410 1 591 2 0 1 907 2 093 2 5 2 405 2 596...

Страница 34: ...34 ni com PXIe 4330 4331 Calibration Procedure Appendix A Connection Path Details Figure 11 Bridge Completion Resistor Measurement 3 5 0 3 5 0 3 5 0 CAL 4330 DMM 2 LO HI Sense HI Sense LO...

Страница 35: ...Calibration Procedure National Instruments 35 Figure 12 Gain Accuracy Verification AUX HI AUX LO OUT HI OUT LO 3 5 0 3 5 0 3 5 0 COLUMN COLUMN EX PXIe 4330 31 EX RS RS AI AI ROW ROW Multifunction Cali...

Страница 36: ...36 ni com PXIe 4330 4331 Calibration Procedure Figure 13 Input Offset Verification ROW COLUMN ROW COLUMN 175 175 175 175 EX PXIe 4330 31 EX RS RS AI AI CAL 4330...

Страница 37: ...libration Accuracy Verification Figure 15 Shunt Calibration Resistance Accuracy Verification AUX HI AUX LO OUT HI Multifunction Calibrator OUT LO COLUMN ROW PXIe 4330 31 AI AI QTR SC QTR SC RS RS EX E...

Страница 38: ...38 ni com PXIe 4330 4331 Calibration Procedure Figure 16 Excitation Voltage Verification ROW ROW EX PXIe 4330 31 EX RS RS AI AI COLUMN COLUMN IN HI DMM 2 IN LO SENSE HI SENSE LO...

Страница 39: ...nal Instruments 39 Figure 17 Gain and Offset Adjustment DMM 2 SENSE HI SENSE LO IN HI IN LO DMM 1 IN HI IN LO AUX HI AUX LO OUT HI Multifunction Calibrator OUT LO 3 5 0 3 5 0 3 5 0 COLUMN COLUMN EX PX...

Страница 40: ...ices The NI website is your complete resource for technical support At ni com support you have access to everything from troubleshooting and application development self help resources to email and ph...

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