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Figure 4. Voltage Remote Sense Diagram, Part 2
3
NI-DCPower Device
Sense LO
Sense HI
HI
LO
Load2
Verifying Current Offset
Remove all connections from the PXIe-4139 and confirm the current measured by the
PXIe-4139 at 0 V falls within the test limits.
Refer to the following table as you complete the following steps.
Complete this procedure only after successfully completing all previous verification
procedures. Verify ranges in the order listed in the table.
Table 5. Current Offset Verification
Level
Range
Limit
Range and
Limit
Test
Point
As-Found Offset Test
Limit
As-Left Offset Test Limit
Lower Limit
Upper
Limit
Lower Limit
Upper
Limit
600 mV
1 μA
0 mV
-40 pA
40 pA
-25 pA
25 pA
10 µA
-300 pA
300 pA
-200 pA
200 pA
100 µA
-2 nA
2 nA
-1.5 nA
1.5 nA
1 mA
-20 nA
20 nA
-15 nA
15 nA
10 mA
-200 nA
200 nA
-150 nA
150 nA
100 mA
-2 μA
2 μA
-1.5 μA
1.5 μA
1 A
-20 μA
20 μA
-15 μA
15 μA
3 A
-600 μA
600 μA
-500 μA
500 μA
3
Follow industry best practices for minimizing thermal electromotive force (EMF) when making the
necessary connections for this procedure.
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NI PXIe-4139 Calibration Procedure