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NI 9229/9239 Calibration Procedure
g.
Set the calibrator to Standby mode (STBY).
h.
Repeat steps d through g for each calibration voltage in the array.
i.
Close the calibration session.
4.
Disconnect the NI 9229/9239 from the calibrator.
EEPROM Update
When an adjustment procedure is completed, the NI 9229/9239 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
section to determine the As-Left status of the device.
Note
If any test fails Reverification after performing an adjustment, verify that you
before returning your device to NI. Refer to
for assistance in returning the device to NI.
Accuracy Under Calibration Conditions
The following calibration specifications are valid under the following conditions:
•
Ambient temperature 23 ± 5 °C
•
NI 9229/9239 installed in slot 8 of an NI cDAQ-9178 chassis
•
Slots 1 through 7 of the NI cDAQ-9178 chassis are empty
Note
The test limits listed in Table 4 are derived using the values in Table 14.
Table 13.
Adjustment Configuration
Physical Channel
Reference Value
cDAQMod8/ai
x
The reference value from the array of adjustment points
Table 14.
NI 9229/9239 Accuracy Under Calibration Conditions
Module
Gain Error
Offset Error
NI 9229
±0.04%
±7.66 mV
NI 9239
±0.04%
±1.35 mV
