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NI 9212 Calibration Procedure
c.
Start the task.
d.
Average the readings.
e.
Clear the task.
10. Perform the following calculation to scale the voltage average to resistance.
11. Compare the calculated resistance to the limits in Table 8.
12. Repeat steps 9 through 11 for each ADC timing mode on the NI 9212.
13. Repeat steps 6 through 12 for each test point.
14. Set the calibrator to Standby mode (STBY).
15. Remove the NI CAL-9212 from the NI 9212.
16. Loosen the captive screws and remove the top cover from the NI CAL-9212.
17. Disconnect the calibrator from the NI CAL-9212.
18. Repeat steps 2 through 17 for the other CJC channel on the NI 9212.
Note
The test limits in Table 8 are derived using the values in Tables 6 and 12.
Table 8.
NI 9212 CJC Verification Test Limits
ADC
Timing
Mode
Test Point
1-Year Limits
Location
Value (
Ω
)
Lower Limit (
Ω
)
Upper Limit (
Ω
)
High
Resolution
Offset
1,000
998.31
1,001.69
Gain 1
19,000
18,983.26
19,016.74
Gain 2
100,000
99,870.09
100,129.91
Best
50/60 Hz
Rejection
Offset
1,000
998.2
1,001.8
Gain 1
19,000
18,982.76
19,017.24
Gain 2
100,000
99,864.75
100,135.25
High Speed
Offset
1,000
997.37
1,002.63
Gain 1
19,000
18,908.53
19,091.47
Gain 2
100,000
99,125.27
100,874.73
Resistance
28000
Voltage
2.5 Voltage
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