Verifying Remote Sense Voltage Offset
Compare a set of voltages measured by a DMM to the voltage test points requested by the
PXIe-4139.
Refer to the following table as you complete the following steps.
Verify ranges in the order listed in the table. Use the same connections as the previous test.
Table 3. Remote Sense Voltage Offset Verification
Level Range Limit Range
and Limit
Test Point As-Found
Measurement Test
Limit
As-Left Measurement
Test Limit
600 mV 1 mA 0 V ±30 μV ±25 μV
6 V ±90 μV ±85 μV
60 V ±900 μV ±820 μV
1. Set the first specified level range, limit range, and limit on the PXIe-4139.
2. Set the niDCPower Sense property or NIDCPOWER_ATTR_SENSE attribute to Remote.
3. Set the level on the PXIe-4139 to the first specified test point.
4. Compare a DMM voltage measurement to the voltage measurement test limits.
a) Take a voltage measurement using the DMM.
b) Verify the DMM measurement falls within the test limits.
5. If more than one level range is specified, repeat the previous steps using the values
specified in each level range.
Verifying Voltage Remote Sense
Use the PXIe-4139 in constant current mode with a test circuit to simulate the voltage drop
between the device and a load.
Refer to the following table as you complete the following steps.
Table 4. Remote Sense Voltage Output Verification
Level
Range
Limit Range
and Limit
Test Point Load1 Load2 Voltage Remote Sense Test
Limit
Load1 Load2
1 mA 600 mV 0 mA 3 kΩ 3 kΩ ≤38.4 µV ≤6 µV
1 mA
1. Set the niDCPower Output Function property or NIDCPOWER_OUTPUT_FUNCTION
attribute to DC Current for the PXIe-4139.
8 | ni.com | NI PXIe-4139 Calibration Procedure
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