What is the procedure for calibrating a pressure transmitter?

Pressure transmitter calibration procedure: 1) Review documentation (range, accuracy specs, calibration due date), 2) Gather equipment (calibrated pressure source, reference gauge with 4x accuracy, multimeter, HART communicator), 3) Apply zero pressure, record output, adjust zero if needed, 4) Apply 100% pressure, record output, adjust span if needed, 5) Check intermediate points (25%, 50%, 75%), 6) Verify hysteresis (decreasing direction), 7) Record all readings on calibration certificate, 8) Calculate errors and verify within tolerance, 9) Apply calibration sticker with date and technician ID.