Which sequence describes a typical calibration procedure for a pressure transmitter?

• A. Isolate the transmitter, apply known pressures across the range using a calibrator, record output, adjust zero at 0% and span at 100%, verify with midpoints, recheck against a second reference point, and document results.
• B. Power the transmitter and adjust only the zero setting, then call it calibrated.
• C. Apply random pressures and compare to a standard.
• D. Document the results without any checks.

Answer: (A)