Development of FPG and FRS piston gauges as primary and secondary absolute and gauge pressure standards
The aim of this work package is to establish Force-balanced Piston Gauges (FPG) and Furness Rosenberg Standard (FRS) piston gauges [2.1, 2.2] as primary and secondary absolute and gauge pressure standards in the pressure range from approximately 1 Pa to 15 kPa with a target uncertainty below 0.01 Pa + 1.4 10-5 p.
These instruments are widely used by NMIs and accredited calibration laboratories, and their low uncertainty capabilities have been demonstrated in a recent EURAMET comparison [2.3]. However their SI traceability in Europe is based on a calibration against primary pressure standards above approximately 5 kPa and an extrapolation at lower pressures.
To enable the use of these instruments as primary standards, the flow between the piston and cylinder have to be better understood so a theoretical model for the effective area as a function of the geometrical dimensions can be made.
Contact: Dominik Pražák (email@example.com)