MEASUREMENT OF EFFECTIVE AREA RATIO OF GAS AND HYDRAULIC PRESSURE BALANCES

Tokihiko Kobata

Abstract

This paper describes a method to compare the pressure generated by gas and hydraulic pressure balances with different medium, in order to improve harmonization between a gas pressure standard and a liquid pressure standard. The pressure range compared is 0.5 MPa to 7 MPa. In the method, a gas-liquid exchanger is used and a precise pressure transducer is employed as a comparator to determine the equilibrium state between the two pressure balances. From the measurement result obtained from the method, it was shown that the effective area ratio of gas and hydraulic pressure balances was determined as a function of pressure with the estimated uncertainty in all the pressure ranges compared.

Keywords

pressure balance, gas pressure, hydraulic pressure, comparison

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PWC-2006-TC16-001u.pdf

DOI

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IMEKO TC

TC16 - Pressure and Vacuum Measurement

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