EVALUATION OF THE UNCERTAINTY OF GAS FLOW MEASUREMENTS BY A CLEARANCE-SEALED PISTON PROVER

Gregor Bobovnik, Jože Kutin, Ivan Bajsić

Abstract

A piston prover measures the flow rate by determining the time interval that a piston needs to pass a known volume of gas at a defined pressure and a temperature. The evaluation of the calibration and measurement capabilities of the clearance-sealed realization of the piston prover is presented. A systematic analysis of the uncertainty covers the components due to the gas density, dimensional and time measurements, the leakage flow, the density correction factor and the repeatability.

Keywords

piston prover, gas, mass flow rate, measurement uncertainty, CMC

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IMEKO-WC-2015-TC9-210.pdf

DOI

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IMEKO TC

TC9 - Flow Measurement

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