National Instruments SC Express PXIe-4330, Calibration Procedure

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PXIe-4330/4331 Calibration Procedure | © National Instruments | 11
3. Connect the CALIBRATOR on the back of the CAL-4330 to a Fluke 5520A multifunction
calibrator as shown in Figure 10.
Figure 10. CALIBRATOR
Verification Procedures
This section provides instructions for verifying the PXIe-4330/4331 specifications. The
PXIe-4330/4331 has eight independent analog input channels. You can conduct verification on
any or all of them, depending upon your desired test coverage.
You can verify the following for PXIe-4330/4331 modules:
•
Gain Accuracy Verification
• Input Offset Verification
• Shunt Quarter-Bridge Calibration Accuracy Verification
• Shunt Calibration Resistance Accuracy Verification
• Excitation Voltage Verification
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.
Complete the following steps to test the gain accuracy of the module.
1.
Configure the switch modules to connect to the 350 Ω bridge completion resistor on the
CAL-4330. Refer to Table 2 for the specific switch column and row configuration. The
connection paths are shown in Figure 11 in
Appendix A: Connection Path Details .
2. Measure the 350 Ω bridge completion resistor with DMM 2 configured for 4-wire
resistance with offset ohms compensation enabled. Divide the measured resistance by 350
and record the result as
R
adj
.
1 CAL-4330 2 Fluke 5520A
AUX
CALIBRATOR
LO HI
VOLTS
LO HI
AUX
A, ˖ - S EN S E, AUX V
20A
TC
GUARD
20 V PK MAX
HI
20V
RMS
MAX
1V PK
MAX
20V
RMS
MAX
1000V
RMS
MAX
LO
NORMAL
V, ˖ , , RTD
2
1