Piston gas flow standard Facility

Abstract

Some gas flowmeters such as standard wet gas meter and critical flow Venturi nozzles are often used in the main standard of standard facility, and their accuracy is high, so its value transmission is particularly important. This paper introduces an active piston gas flow standard device. This paper introduces an active piston gas flow standard facility, which is composed of three active pistons and used in series. The measuring range can reach (0.01~128) m 3 /h, and the pistons can be automatically switched according to the required flow during the detection process. According to JJF 1586-2016 "Calibration Specification for Active Piston Provers", analysis the uncertainty of the active piston flow standard facility. It can be obtained that the expanded uncertainty of the device is Ur(V)=0.062%(k=2).Through the result of uncertainty evaluation, the standard facility can transmit the value to the gas flowmeter with higher accuracy level.