4.
Set the level on the PXIe-4137 to the first specified test point.
5.
Calculate the current through the shunt by completing the following steps.
a)
Take a voltage measurement across the shunt using the DMM.
b)
Divide the voltage measurement by the calibrated value of the shunt.
6.
Store the value from the previous step to use as an input for the niDCPower Cal Adjust
VI or function called in the following steps.
7.
If more than one test point per level range is specified, repeat the previous steps for each
test point, from setting the level to the test point on the PXIe-4137 up to this step.
8.
Update the output calibration constants by configuring and calling the niDCPower Cal
Adjust Current Limit VI or
niDCPower_CalAdjustCurrentLimit
function.
a)
Input the calculated shunt current measurements as the
measured outputs
.
b)
Input the test points as the
requested outputs
.
c)
Input the specified level range as the
range
.
9.
If more than one level range is specified, repeat the previous steps using the values
specified in each level range.
Residual Offset Voltage
Connecting and Configuring Equipment to Adjust Residual
Offset Voltage
1.
Make the necessary connections for this procedure, as shown in the following figure:
Figure 13. Residual Voltage Offset Diagram
7
NI-DCPower Device
Sense LO
Sense HI
HI
LO
2.
Set the
niDCPower Output Function
property or
NIDCPOWER_OUTPUT_FUNCTION
attribute to DC Voltage for the PXIe-4137.
7
Follow industry best practices for minimizing thermal electromotive force (EMF) when making the
necessary connections for this procedure.
NI PXIe-4137 Calibration Procedure
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© National Instruments
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