NI PXIe-4154 Calibration Procedure
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© National Instruments Corporation
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7
Current Output Verification
To verify the current output of an NI PXIe-4154, compare a range of requested current test points
to the measurements of the actual current at the output. Current output is calculated by dividing
the voltage measured across the precision shunt by the actual resistance of the precision shunt.
Refer to Figure 3 for a connection diagram with a
100 m
Ω
precision shunt. Refer to Figure 4 for
a connection diagram with a
100
Ω
precision shunt.
Figure 3.
Current Verification Connection Diagram with 100 m
Ω
Precision Shunt
Table 2.
NI
PXIe-
4154 Voltage Output Verification Points
Channel
Range
Test
Point
Limits of Accuracy
Measured
Lower Limit
Upper Limit
As Found
As Left
0
6 V
0 V
-0.005 V
0.005 V
1.5 V
1.4944 V
1.5056 V
3 V
2.9938 V
3.0062 V
4.5 V
4.4932 V
4.5068 V
6 V
5.9926 V
6.0074 V
1
8 V
0 V
-0.006 V
0.006 V
2 V
1.9932 V
2.0068 V
4 V
3.9924 V
4.0076 V
6 V
5.9916 V
6.0084 V
8 V
7.9908 V
8.0092 V
NI PXIe-4154
Sense –
Sense +
Output –
DMM
Voltage
Mode
+
–
Precision
100 m
Ω
Shunt
I
1
I
2
S
1
S
2
