National Instruments 9775, Calibration Procedure

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EEPROM Update
When an adjustment procedure is completed, the NI 9775 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 You must remove and re-insert the module from the chassis before running
verification.
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
Worldwide Support and Services 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.
The following accuracy table is valid for calibration under the following conditions:
•
Ambient temperature 23 °C ± 5 °C
• NI 9775 installed in slot 8 of an cDAQ-9178 chassis
• Slots 1 through 7 of the cDAQ-9178 chassis are empty
Note The test limits listed in NI 9775 Verification Limits for DC Accuracy table are
derived using the values in the following table.
Table 14. NI 9775 Accuracy Under Calibration Conditions
Accuracy Type Gain Error Offset Error (mV)
AC ±1.39% —
DC ±0.54% ±15 mV
Note
For operational specifications, refer to the NI 9775 Datasheet online at
ni.com/manuals .
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