Figure 3. Current Verification or Adjustment Connection Diagram
NI-DCPower Device
Sense LO
Sense HI
HI
LO
DMM
Current
Mode
+
–
2.
Set the
niDCPower Output Function
property or
NIDCPOWER_OUTPUT_FUNCTION
attribute to DC Current for the NI 4141.
Verifying Current Output and Measurement
Compare a set of currents measured by the external DMM to both a set of current test points
requested by the NI 4141 and to the measured currents reported by the NI 4141.
Refer to the following table as you complete the following steps.
Table 3. Current Output and Measurement Verification
Level
Range
Limit
Range
and Limit
Test Point
DMM
Range
As-Found
Output Test
Limit (% of
C
Offset)
As-Found
Measurement Test
Limit (% of C
Offset)
10 μA
10 V
-10 μA
10 μA
0.03% + 300 pA
0.03% + 300 pA
0 µA
1 μA
10 μA
10 μA
100 μA
10 V
-100 μA
100 μA
0.03% + 3.0 nA
0.03% + 3.0 nA
0 µA
1 μA
100 μA
100 μA
8
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NI PXIe-4141 Calibration Procedure
