6. Compare the averaged samples to the limits in the
NI 9231 Verification Test Limits
table
to verify the input accuracy. If the value is within these limits, the device passes the test.
7. Repeat steps 3 through 7 for each test point in the
NI 9231 Verification Test Limits
table.
8. Set the calibrator to Standby mode (STBY).
9. Repeat steps 1 through 8 for each channel on the NI 9231.
Table 4.
NI 9231 Verification Test Limits
Test Point
2-Year Limits
Location
Value (V)
Lower Limit (VDC)
Upper Limit (VDC)
Minimum
-4.9
-4.907121
-4.892879
Mid-scale
0
-0.001565
0.001565
Maximum
4.9
4.892879
4.907121
Note
The test limits listed in the
NI 9231 Verification Test Limits
table are derived
using values from the
NI 9231 Accuracy Under Calibration Conditions
table.
Adjustment
The following performance adjustment procedure describes the sequence of operation required
to adjust the NI 9231.
Accuracy Adjustment
Complete the following procedure to adjust the accuracy performance of the NI 9231.
1. Set the calibrator to Standby mode (STBY).
2. Connect channel 0 of the NI 9231 to the calibrator as shown in the
Accuracy Verification
section.
3. Adjust the NI 9231.
a) Initialize a calibration session on the NI 9231. The default password is
NI
.
b) Input the external temperature in degrees Celsius.
c) Call the NI 9231 get C Series adjustment points function to obtain an array of
recommended calibration voltages for the NI 9231.
d) Set the calibrator to a reference value determined by the array of recommended
calibration voltages.
e) Set the calibrator to Operate mode (OPR).
f) Call and configure the NI 9231 adjustment function according to
NI 9231
Adjustment Configuration
table.
NI 9231 Calibration Procedure
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© National Instruments
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Summary of Contents for NI 9231
Page 1: ...NI 9231...
