Abstract

The necessity of the gas flowmeters calibration with the use of gas at expected working pressure is now beyond dispute. Most of gas meters types show the sensitivity to the parameters of the measured gas. The calibration factor, usually expressed as number of pulses per unit of volume, shifts when there is a change of an operating pressure. Change of operating pressure causes shift of calibration curve - so gas meters should be calibrated as close to operating conditions as possible. Polish Gas Transmission System Operator GAZ-SYSTEM SA decided to build the High Pressure Gas Meters Calibration Facility (HPCF) where natural gas is used as a working medium. The paper presents measures taken to overcome technical and metrological problems encountered during design and construction of the facility.

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