Pressure calibrations can be performed in a laboratory environment, a test bench, or in the field. All that is needed to calibrate a pressure indicator, transmitter or transducer is a regulated pressure source, a pressure standard, a way to read the DUT, and the means to connect the DUT to the regulated pressure source and the pressure standard. Pressure rated tubing, fittings, and a manifold to isolate from the measured process pressure may be the only equipment necessary to perform the calibration.
An ISO/IEC 17025 standard accreditation ensures the organization conducting calibration is deemed competent. The standard focuses on general, structural, resource, process, and management system requirements, ensuring results are based on accepted science and the accredited organization is producing technical valid results.