•
Following the adjustment procedure automatically updates the calibration date
and temperature in the external calibration area of the onboard flash memory of
the NI PXIe-7865/7866 device.
•
If an adjustment is not required use the
nirio78xxCalibrationUpdateExtCalDate.vi
to update the External
Calibration date.
Complete the following procedure to adjust the calibration constants performance of the NI
PXIe-7865/7866 device.
1.
Set the calibrator to Standby mode (STBY).
2.
Connect your device to the calibrator.
3.
Initialize the external calibration process by calling
nirio78xxRCalibrationAdjustExtCal.vi
. Set the Action to
Initialize
. This
action is password-protected and the default password is
NI
. You do not need to input
values for Comments or Current Calibrator Value.
4.
Determine the value of the NI PXIe-7865/7866 device onboard reference by completing
the following steps.
a)
Call
nirio78xxCalibrationAdjustExtCal.vi
. Set the Action to
CalibrateOnboardReference
and pass the Current Calibrator Value of 0 V to
the VI for the first iteration.
nirio78xxCalibrationAdjustExtCal.vi
then
performs measurements and determines a new Requested Calibrator Value.
b)
Program the calibrator to output the Requested Calibrator Value. At this point, you
must wait to ensure that the calibrator output has settled completely.
c)
Repeat steps a and b until the Reference Calibration Done output becomes TRUE.
With each new iteration of these steps, input the Requested Calibrator Value returned
from the previous iteration.
5.
Adjust the NI PXIe-7865/7866 device external calibration constants by calling
nirio78xxCalibrationAdjustExtCal.vi
. Set the Action to
AdjustCalibration
.
6.
Save the calibration adjustment values to the onboard flash memory using
nirio78xxCalibrationAdjustExtCal.vi
. Set the Action to
CommitAndClose
.
a)
If you would prefer to cancel the calibration, you call this VI and set the Action to
CancelandClose
. A comment input is provided for storing any comments related
to your calibration.
7.
Disconnect the calibrator from the device.
Reverification
Repeat the
Verification
section to determine the As-Left status of the device.
Note
If any test fails Reverification after performing an adjustment, verify that you
have met the Test Conditions before returning your device to NI. Refer to the
Worldwide Support and Services
section for assistance in returning the device to NI.
8
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ni.com
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NI PXIe-7865 and NI PXIe-7866 Calibration Procedure
