A pressure transmitter drifts. Diaphragm fatigue, temperature swings, vibration, and process buildup move the zero and span over time. A 0.1 % drift on a 0–1.6 MPa range puts the loop 1.6 kPa off — enough to trip a safety interlock or skew … Continue reading Pressure Transmitter Calibration: 5-Step Bench & HART Procedure