Answer Posted / carl_ellis
Disconnect the field sensor.
Connect a calibrated/traceable temperature signal calibrator.
Apply LRV value.
Trim the 4.0mA output.
Apply the URV value.
Trim the 20.0mA output.
Check as many interim points as the calibration protocol requires and note the output and the deviation from the expected value.
Determine whether the transmitter is within spec from the deviation values seen.
If transmitter passes, reconnect the field sensor to the input.
Fill in the paperwork.
Carl Ellis
Measure First
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