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TB-9212 Calibration Procedure
Notes
Make sure the thermocouple calibrator and NI 9212 are completely settled
at the desired temperature setting before acquiring data.
Wait at least 300 ms for the Ectron 1140A to settle before acquiring data with the
NI 9212.
Wait at least 1 second to compensate for the open thermocouple settling time of the
NI 9212.
d.
Average the readings for each channel. Record the average of the readings for each as
Temp
ai
x
where
x
is the channel number.
e.
Clear the task.
10. Set the thermocouple calibrator output to CJC
temp1
to obtain the readings for the next four
physical channels, ai4:7. This ensures that during the thermocouple measurements, the
input channel measures very close to 0 V, which eliminates gain errors in the NI 9212.
11. Repeat step 9.
12. Perform the following calculation using the recorded Temp
ai
x
and CJC
temp
x
values.
Temp
ErrorCh0
:3
=
Temp
ai0:3
-
CJC
temp0
Temp
ErrorCh4:7
=
Temp
ai4:7
-
CJC
temp1
13. Compare the calculation result for each channel to the Upper Limit and Lower Limit values
in Table 6.
14. Remove the TB-9212 from the NI 9212.
15. Disconnect the barrier strip assembly from the TB-9212.
Note
The test limits listed in Table 6 are based upon the 374389A-01 edition of the
NI 9212 with NI TB-9212 Datasheet.
Refer to the most recent
NI 9212 with
NI TB-9212 Datasheet
.
If the verification procedure determines that the TB-9212 is outside of the limits, refer to
for assistance in returning the device to NI.
Table 6.
TB-9212 Verification Test Limits
Connector
Timing
Mode
Test Point
Value (°C)
Error
1-Year Limits (°C)
Lower
Limit
Upper
Limit
TB-9212
with Screw
Terminal
High
Resolution
CJC
temp
x
Temp
ErrorCh
x
-0.44
0.44
TB-9212
with
Mini-TC
-1.1
1.1
