Verifying Current Output
Compare a set of currents measured by an external DMM to the current test points requested
by the NI 4112.
Refer to the following table as you complete the following steps.
Table 4. Current Output Verification
Level Range Limit Range and Limit Test Point As-Found Output Test Limit (% of
Current + Offset)
1 A 60 V 0.1 A 0.15% + 10 mA
1 A
1. Set the first specified level range, limit range, and limit on the NI 4112.
2. Set the level on the NI 4112 to the first specified test point.
3. Compare a DMM current measurement to the current output test limits.
a) Take a current measurement using the DMM.
b) Calculate the lower and upper current output test limits using the following formula:
Current Output Test Limits = Test Point ± (|Test Point| × % of Current + Offset)
c) Verify the DMM measurement falls within the test limits.
4. Repeat the previous two steps for each test point specified in the level range.
5. If more than one level range is specified, repeat the previous steps using the values
specified in each level range.
Verifying Current Measurement
Compare a set of measured currents reported by the NI 4112 to the currents measured by an
external DMM.
Refer to the following table as you complete the following steps.
Table 5. Current Measurement Verification
Level Range Limit Range and
Limit
Test Point As-Found Measurement Test Limit
(% of Current + Offset)
1 A 60 V 0.1 A 0.15% + 4 mA
1 A
1. Set the first specified level range, limit range, and limit on the NI 4112.
2. Set the level on the NI 4112 to the first specified test point.
3. Compare an NI 4112 current measurement to the current measurement test limits.
a) Take a current measurement using the DMM, and take a current measurement using
the NI 4112.
8 | ni.com | NI PXIe-4112 Calibration Procedure
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