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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 12.
Residual Voltage Offset Diagram
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 NI 4138.
Adjusting Residual Voltage Offset
Short the NI 4138 terminals and call the appropriate VI or function.
Complete this procedure only after successfully completing all previous adjustment
procedures.
Eliminate residual offset voltage at 0 V by configuring and calling the niDCPower Cal
Adjust Residual Voltage Offset VI or niDCPower_CalAdjustResidualVoltageOffset
function.
Closing the Adjustment Session
Close the session and commit the new constants to hardware by calling the niDCPower
Close External Calibration VI or niDCPower_CloseExtCal function and specifying
Commit as the
calibration close action
.
Alternative to Adjustment Procedures
If your device passes all verification procedures successfully and you want to skip updating
the calibration constants, you can update solely the calibration date by completing the
following steps.
Note
National Instruments recommends following all adjustment procedures in
order to update the calibration constants and renew the device calibration interval.
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NI PXIe-4138 Calibration Procedure