3.
Adjust the NI 9251 with mini XLR.
a)
Initialize a calibration session on the NI 9251 with mini XLR. The default password
is
NI
.
b)
Input the external temperature in degrees Celsius.
c)
Call the NI 9251 with mini XLR get C Series adjustment points function to obtain an
array of recommended calibration voltages for the NI 9251 with mini XLR.
d)
Set the calibrator to a reference value determined by the array of recommended
calibration voltages.
e)
Set the calibrator to Operate mode (OPR).
f)
Call and configure the NI 9251 with mini XLR adjustment function according to
NI 9251 with mini XLR Adjustment Configuration
table.
Table 5. NI 9251 with mini XLR Adjustment Configuration
Physical Channel
Reference Value
cDAQ1Mod8/AI0:1
The actual value of the voltage output of the calibrator
g)
Set the calibrator to Standby mode (STBY).
h)
Repeat steps d through g for each point in the array.
i)
Close the calibration session.
4.
Disconnect the NI 9251 with mini XLR from the calibrator.
EEPROM Update
When an adjustment procedure is completed, the NI 9251 with mini XLR internal calibration
memory (EEPROM) is immediately updated.
If you do not want to perform an adjustment, you can update the calibration date and onboard
calibration temperature without making any adjustments by initializing an external calibration,
setting the C Series calibration temperature, and closing the external calibration.
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.
Accuracy under Calibration Conditions
The values in the following table are based on calibrated scaling coefficients, which are stored
in the onboard EEPROM.
6
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NI 9251 Calibration Procedure