Verification Protocol
Formal metrological procedures establish the relationship between electrical signal outputs produced by a pressure sensor and accurate physical pressure values applied by a primary standard. A pressure transducer calibration evaluates full-scale output, linearity, hysteresis and zero-offset errors under controlled ambient conditions. Testing sequences apply pressure at incremental steps across the operating span, recording sensor output voltage or current at each hold point.
Comparing sensor response against certified standard values determines compliance with manufacturer specification limits. Quality management systems mandate issuing formal calibration certificates documenting these comparison results and expanded uncertainties.
Reference Comparison
Deadweight testers or digital pressure controllers deliver stable reference pressures to the sensor under test inside temperature-controlled testing bays. Performing pressure transducer calibration requires applying both ascending and descending pressure cycles to capture hysteresis effects and repeatability error. Technicians calculate zero drift and span error by comparing measured output voltages against calculated theoretical outputs.
Correction Matrix
Modern digital transmitters save multi-point calibration coefficients into onboard non-volatile memory to correct linear and thermal output errors automatically.
Interval Determination
Operating history and drift rate evaluations determine the recalibration frequency required to maintain target measurement reliability. Scheduled pressure transducer calibration prevents uncompensated measurement drift from corrupting automated process control loops.
