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CALIBRATION PROCEDURE
PXIe-4330/4331
This document contains information about verifying and adjusting National Instruments
PXIe-4330/4331 modules using NI-DAQmx 9.1 and later. For more information about
calibration, visit
ni.com/calibration
Contents
Software.................................................................................................................................... 2
Documentation.......................................................................................................................... 2
Calibration Interval................................................................................................................... 2
Test Equipment......................................................................................................................... 3
Test Conditions......................................................................................................................... 4
Calibration Procedure ............................................................................................................... 4
Initial Setup....................................................................................................................... 5
Connecting the Equipment ............................................................................................... 5
Install the CAL-4330 Into a Rack (Optional)........................................................... 7
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-Bridge Calibration Accuracy Verification........................................ 15
Shunt Calibration Resistance Accuracy Verification ............................................... 17
Excitation Voltage Verification................................................................................ 18
Gain and Offset Adjustment Procedure............................................................................ 20
Test Limits................................................................................................................................ 24
Gain Accuracy Test Limits............................................................................................... 25
Input Offset Test Limits ................................................................................................... 31
Shunt Quarter-Bridge Calibration Test Limits ................................................................. 32
Shunt Calibration Resistance Test Limits ........................................................................ 32
Excitation Voltage Test Limits......................................................................................... 33
Appendix A: Connection Path Details...................................................................................... 34
Worldwide Support and Services ............................................................................................. 40
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Summary of Contents for National Instruments PXIe-4330
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Page 1: Table Of Contents
CALIBRATION PROCEDURE PXIe-4330/4331 This document contains information about verifying and adjusting National Instruments PXIe-4330/4331 modules using NI-DAQmx 9.1 and later. For more information about calibration, visit ni.com/calibration Contents Software............................ 2 Documentation.......................... 2 Calibration Interval........................2 Test Equipment......................... 3 Test Conditions......................... 4 Calibration Procedure ....................... -
Page 2: Software
Calibration Interval National Instruments recommends a calibration interval of one year for the PXIe-4330/4331. Adjust and verify the PXIe-4330/4331 at the recommended calibration interval based on the measurement accuracy demands of your application. 2 | ni.com | PXIe-4330/4331 Calibration Procedure... -
Page 3: Test Equipment
Test Equipment National Instruments recommends that you use the equipment in Table 1 for calibrating an PXIe-4330/4331 module. Table 1. Recommended Equipment Equipment Recommended Model(s) Requirements Multifunction Fluke 5520A If this instrument is unavailable, use a calibrator calibrator that can provide resistance values in the range of 120 Ω... -
Page 4: Test Conditions
Calibrator ambient temperature changes by more than 5 °C. Warm-up time for Fluke 5520A is 30 minutes. Calibration Procedure This section provides instructions for verifying the performance of the PXIe-4330/4331. The calibration process consists of the following steps: Initial Setup—Install the module and configure it in Measurement & Automation Explorer (MAX). -
Page 5: Initial Setup
Detailed connection paths for each of the verification calibration steps are shown in Appendix A: Connection Path Details. Before connecting or disconnecting the calibrator from the module, always set the calibrator to standby mode (STBY). PXIe-4330/4331 Calibration Procedure | © National Instruments | 5... - Page 6 SWITCH 2 DEVICE UNDER TEST CAL-4330 PXIe-4330/4331 SWITCH 1 SWITCH 2 DEVICE UNDER TEST Figure 3. Rear Connectors SENSE VOLTS VOLTS VOLTS CAL-4330 DMM 2 DMM 1 CALIBRATOR DMM 2 DMM 1 CALIBRATOR 6 | ni.com | PXIe-4330/4331 Calibration Procedure...
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Page 7: Install The Cal-4330 Into A Rack (Optional)
Attach the PXIe chassis rack-mount hardware to the PXIe chassis. Refer to your rack-mount kit installation guide for more details. Mount the PXIe chassis in the rack in the desired position. Refer to your rack-mount kit installation guide for more details. PXIe-4330/4331 Calibration Procedure | © National Instruments | 7... -
Page 8: Connect The Calibration And Switch Cables
0.90 N · m (8.0 lb · in.), as shown in Figure 5. 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. - Page 9 PXIe-2737 modules and tighten all the jack screws to 0.56 N · m (5.0 lb · in.), as shown in Figure 6 and Figure 7. Figure 6. Connecting the Switch 2 Cable Figure 7. Connecting the Switch 1 Cable PXIe-4330/4331 Calibration Procedure | © National Instruments | 9...
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Page 10: Connect The Dmm And Multifunction Calibrator Cables
Connect DMM 2 on the back of the CAL-4330 to another PXI-4071 as shown in Figure 9. Figure 9. DMM 2 SENSE VOLTS DMM 2 NI PXI-4071 6½-Digit FlexDMM INPUT 300 V CAT II AMPS 250 V 300 V SENSE CAT II AUX I/O CAL-4330 PXI-4071 10 | ni.com | PXIe-4330/4331 Calibration Procedure... -
Page 11: Verification Procedures
Gain Accuracy Verification This section provides 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 23 to determine if the module is operating within its specified range. - Page 12 0 V/V nominal value, 350 Ω, indicated in Table 12 for excitation voltages >2.5 V or Table 13 for excitation voltages ≤2.5 V for f ≤ 51.2 kHz. Use Tables 14 through 23 for f > 51.2 kHz and their specific excitation voltages. 12 | ni.com | PXIe-4330/4331 Calibration Procedure...
- Page 13 2 V r × where V is the compensated reading from the PXIe-4330/4331 and GF is a gage factor of 2. 20. If calibrating an NI PXIe-4331, repeat steps 7 through 19 using a sample rate of 102.4 kHz and the appropriate test limits from Tables 14 through 23.
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Page 14: Input Offset Verification
This section provides instructions for verifying the PXIe-4330/4331 input offset specifications. Table 8 shows all settings for the PXIe-4330/4331. Throughout the input offset verification, use Tables 24 and 25 to determine if the module is operating within its specified range. -
Page 15: Shunt Quarter-Bridge Calibration Accuracy Verification
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. - Page 16 GF 1 × where V is the compensated reading from the PXIe-4330/4331 and GF is a gage factor of 2. 22. Repeat steps 3 through 21 for each combination of quarter-bridge completion and shunt calibration resistance settings you want to verify.
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Page 17: Shunt Calibration Resistance Accuracy Verification
This section provides instructions for verifying the PXIe-4330/4331 shunt resistance accuracy. Table 10 shows all settings for the PXIe-4330/4331. Throughout the shunt resistance accuracy verification, use Table 27 to determine if the module is operating within its specified range. If... -
Page 18: Excitation Voltage Verification
Test Limits section shows all acceptable excitation voltage settings for the PXIe-4330/4331. Throughout the excitation voltage verification, use Table 28 to determine if the module is operating within its specified range. Complete the following steps to test the performance of the module. - Page 19 Finite number of samples Rate (Hz) 25,600 Samples to Read 10,000 Measurement Type Bridge Max Input Limit 0.10 Min Input Limit -0.10 Units Bridge Type Full Bridge Nominal Bridge Resistance 350 Ω PXIe-4330/4331 Calibration Procedure | © National Instruments | 19...
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Page 20: Gain And Offset Adjustment Procedure
Configure the switch modules to connect to the channel you want to verify. Refer to Table 11 for the specific switch column and row configuration.The connection paths are shown in Figure 17 in Appendix A: Connection Path Details. 20 | ni.com | PXIe-4330/4331 Calibration Procedure... - Page 21 Set the calibrator resistance output to 350 Ω Set the calibrator to operate mode (OPR). Open a calibration session on your module using the DAQmx Initialize External Calibration VI. The default password is PXIe-4330/4331 Calibration Procedure | © National Instruments | 21...
- Page 22 Dev1 password: calHandle: &calHandle For the channel and excitation setting you want to adjust, set up the calibration on the PXIe-4330/4331 with the DAQmx Setup 433x Calibration VI. LabVIEW Block Diagram NI-DAQmx Function Call Call DAQmxSetup433xCal with the following parameters:...
- Page 23 17. Call the 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 Reading shuntLocation: DAQmx_Val_R4 PXIe-4330/4331 Calibration Procedure | © National Instruments | 23...
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Page 24: Test Limits
Verification Procedures section. Test Limits 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 test limits tables: •... -
Page 25: Gain Accuracy Test Limits
Gain Accuracy Test Limits ≤ 51.2 kHz, Table 12. PXIe-4330/4331 Gain Accuracy Verification Test Limits, f > 2.5 V 1-Year Limits Nominal Lower Upper Calibrator Value Nominal Limit Limit Lower Upper Output (Ω) (V/V) Value (με) (V/V) (V/V) Limit (με) Limit (με) - Page 26 -0.0061728 12,500.0 -0.0061782 -0.0061674 12,489.1 12,510.9 367.50 * R -0.0121951 25,000.0 -0.0122058 -0.0121845 24,978.1 25,021.9 458.50 * R -0.0670996 155,000.0 -0.0671583 -0.0670409 154,864.4 155,135.6 509.60 * R -0.0928339 228,000.0 -0.0929151 -0.0927526 227,800.5 228,199.5 26 | ni.com | PXIe-4330/4331 Calibration Procedure...
- Page 27 -0.0061771 -0.0061686 12,491.4 12,508.6 367.50 * R -0.0121951 25,000.0 -0.0122035 -0.0121867 24,982.8 25,017.2 458.50 * R -0.0670996 155,000.0 -0.0671457 -0.0670534 154,893.4 155,106.6 509.60 * R -0.0928339 228,000.0 -0.0928977 -0.0927701 227,843.3 228,156.8 PXIe-4330/4331 Calibration Procedure | © National Instruments | 27...
- Page 28 -0.0061728 12,500.0 -0.0061793 -0.0061664 12,486.9 12,513.1 367.50 * R -0.0121951 25,000.0 -0.0122079 -0.0121824 24,973.9 25,026.1 380.80 * R -0.0210728 44,000.0 -0.0210948 -0.0210508 43,954.0 44,046.0 385.00 * R -0.0238095 50,000.0 -0.0238344 -0.0237846 49,947.7 50,052.3 28 | ni.com | PXIe-4330/4331 Calibration Procedure...
- Page 29 -0.0061778 -0.0061679 12,490.0 12,510.0 367.50 * R -0.0121951 25,000.0 -0.0122049 -0.0121854 24,980.0 25,020.0 380.80 * R -0.0210728 44,000.0 -0.0210897 -0.0210559 43,964.8 44,035.2 385.00 * R -0.0238095 50,000.0 -0.0238286 -0.0237905 49,960.0 50,040.0 PXIe-4330/4331 Calibration Procedure | © National Instruments | 29...
- Page 30 -0.0061728 12,500.0 -0.0061769 -0.0061688 12,491.9 12,508.1 367.50 * R -0.0121951 25,000.0 -0.0122030 -0.0121872 24,983.8 25,016.3 380.80 * R -0.0210728 44,000.0 -0.0210865 -0.0210591 43,971.4 44,028.6 385.00 * R -0.0238095 50,000.0 -0.0238250 -0.0237940 49,967.5 50,032.5 30 | ni.com | PXIe-4330/4331 Calibration Procedure...
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Page 31: Input Offset Test Limits
Input Offset Test Limits ≤ 51.2 kHz Table 24. PXIe-4330/4331 Input Offset Accuracy Verification Test Limits, f 1-Year Limits Excitation (V) Lower Limit (μV/V) Upper Limit (μV/V) 0.625 -268.8 268.8 -168.0 168.0 -112.0 112.0 -84.0 84.0 -67.2 67.2 2.75 -39.3 39.3... -
Page 32: Shunt Quarter-Bridge Calibration Test Limits
-7,374.38 -4,940.59 -2,482.59 Lower Limit (μV/V) -7,403.94 -4,960.40 -2,492.54 Upper Limit (μV/V) Shunt Calibration Resistance Test Limits Table 27. PXIe-4330/4331 Shunt Calibration Resistance Verification Test Limits Nominal Value (Ω) Lower Limit (Ω) Upper Limit (Ω) 33,333 33,300 33,367 50,000 49,950... -
Page 33: Excitation Voltage Test Limits
Excitation (V) Lower Limit (V) Upper Limit (V) 0.625 0.539 0.711 0.912 1.088 1.410 1.591 1.907 2.093 2.405 2.596 2.75 2.653 2.847 3.201 3.400 4.892 5.108 7.380 7.621 10.0 9.867 10.133 PXIe-4330/4331 Calibration Procedure | © National Instruments | 33... -
Page 34: Appendix A: Connection Path Details
Appendix A: Connection Path Details Figure 11. Bridge Completion Resistor Measurement CAL-4330 + – + – – – – DMM 2 Sense HI Sense LO – – 34 | ni.com | PXIe-4330/4331 Calibration Procedure... - Page 35 Figure 12. Gain Accuracy Verification COLUMN PXIe-4330/4331 Calibration Procedure | © National Instruments | 35...
- Page 36 Figure 13. Input Offset Verification COLUMN 36 | ni.com | PXIe-4330/4331 Calibration Procedure...
- Page 37 Figure 15. Shunt Calibration Resistance Accuracy Verification PXIe-4330/31 + – + – – –EX –RS –AI QTR/SC QTR/SC – DMM 2 IN HI IN LO SENSE HI SENSE LO – – PXIe-4330/4331 Calibration Procedure | © National Instruments | 37...
- Page 38 Figure 16. Excitation Voltage Verification + – + – – – DMM 2 PXIe-4330/31 IN HI – – IN LO –EX SENSE HI –AI SENSE LO –RS 38 | ni.com | PXIe-4330/4331 Calibration Procedure...
- Page 39 Figure 17. Gain and Offset Adjustment COLUMN PXIe-4330/4331 Calibration Procedure | © National Instruments | 39...
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Page 40: Worldwide Support And Services
NI products/technology, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your media, or the National Instruments Patents Notice at ni.com/patents. You can find information about end-user license agreements (EULAs) and third-party legal notices in the readme file for your NI product. Refer to the Export Compliance Information at ni.com/legal/export-compliance for the NI global trade compliance policy and how to obtain relevant HTS codes, ECCNs, and other import/export data.
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