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NI 9219 Calibration Procedure
p.
Repeat steps i through o for every value in the array.
q.
Close the calibration session.
3.
Disconnect the DMMs and the resistors from the device.
4.
Repeat steps 1 through 3 for each channel on the NI 9219.
EEPROM Update
When an adjustment procedure is completed, the NI 9219 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
have met the
before returning your device to NI. Refer to
for assistance in returning the device to NI.
Accuracy Under Calibration Conditions
The following accuracy table is valid for calibration under the following conditions:
•
Ambient temperature of 23 ± 5 °C
•
NI 9219 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 Tables 4, 7, 10, 13, 16, 19, 22, 25, 30, are derived
using the values in Table 53.
Table 52.
Adjustment Configuration
Physical Channel
Reference Value
cDAQMod8/ai
x
Ratio
ref
Table 53.
NI 9219 Accuracy Under Calibration Conditions
Mode
Range
PPM of
Reading
PPM of
Range
Minimum
Maximum
Voltage ±60 V
–60 V
60 V
1643
17
Voltage ±15 V
–15 V
15 V
1623
55