Table 9.
Voltage Output and Measurement Adjustment
Level Range
Limit Range and Limit
Test Point
6 V
100 mA
5 V
-5 V
1.
Set the first specified level range, limit range, and limit on the NI 4138.
2.
Set the level on the NI 4138 to the first specified test point.
3.
Take a voltage measurement using the DMM.
4.
Store the value from the previous step as input for the niDCPower Cal Adjust VI or
function called in the following steps.
5.
Repeat the previous steps, from setting the level to the test point on the NI 4138 up to this
step, for each specified test point in the level range.
6.
Update the output calibration constants by configuring and calling the niDCPower Cal
Adjust Voltage Level VI or niDCPower_CalAdjustVoltageLevel function.
a)
Input the DMM measurements as the measured outputs.
b)
Input the test points as the requested outputs.
c)
Input the specified level range as the range.
7.
If more than one level range is specified, repeat the previous steps using the values
specified in each level range.
Adjusting
1 μ
A to 100 mA Current Output and Measurement
Complete this procedure only after successfully completing all previous adjustment
procedures. Adjust ranges in the specified order.
Refer to the following table as you complete the following steps.
Table 10.
1 µA to 100 mA Current Output and Measurement Adjustment
4
Level Range
Limit Range and Limit
Test Point
100 µA
6 V
100 µA
-100 µA
1 mA
6 V
100 µA
5
-100 µA
1.
Make the necessary connections for this procedure, as shown in the following figure.
4
Adjusting the 100 µA and 1 mA level ranges automatically adjust the following ranges: 1 μA,
10 µA, 10 mA, and 100 mA.
5
The NI 4138 requires that you verify ±100 µA test points in the 1 mA level range.
NI PXIe-4138 Calibration Procedure
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© National Instruments
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