VOLUME RATIO DETERMINATION IN STATIC EXPANSION SYSTEMS BY MEANS OF TWO PRESSURE BALANCES

David Herranz, Salustiano Ruiz, Mª. Nieves Medina

Abstract

Static expansion systems are used to generate known pressures in the high and medium vacuum range. In these systems the volume ratios are the crucial parameters and have to be determined very accurately. For this task different methods can be used. We have used the gas accumulation method with a dead weight pressure balance, a force-balanced piston gauge (FPG) and a differential pressure transducer (CDG 133.32 Pa). The final uncertainty of the expansion ratios obtained with this method is similar to other institutes uncertainties.

Keywords

vacuum, expansion

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IMEKO-WC-2009-TC16-280.pdf

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IMEKO TC

TC16 - Pressure and Vacuum Measurement

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