Calibrating industrial pressure transmitters, differential pressure gauges, and safety relief valves requires selecting the appropriate pressure generation media and calibrator architecture.
1. Pneumatic Gas vs. Hydraulic Fluid Media
Pneumatic calibration uses clean compressed air or dry nitrogen gas. It is mandatory for sanitary pharmaceutical transducers, cleanroom differential transmitters, and oxygen service systems up to 40 bar to avoid liquid contamination. For pressures exceeding 40 bar up to 700 bar and 1000 bar, hydraulic oil or de-ionized water calibration systems (such as the DB Barion-H Series) provide incompressible volume control and fine screw-pump resolution.
2. Digital Master Calibrator vs. Dead Weight Testers
While Dead Weight Testers (DWT) remain the primary laboratory standard, modern digital pressure calibrators like the DB Barion Series deliver 0.02% Full Scale accuracy with dual internal sensor ranges, instantaneous digital logging, automated leak testing, and built-in 24V loop power for field technicians.
3. Contamination Safeguards
Always utilize transparent moisture and dirt traps when transitioning from dirty hydraulic plant transmitters to delicate master electronic calibrators.