A gas flowrate calibration facility with adjustable pressure and temperature

Abstract

Based on master meter principle, a gas flowrate calibration facility with adjustable pressure and temperature is designed. The working principle and structure of this facility is detailly introduced. The calibration method of gas flowmeters is given and the uncertainty is evaluated. With this facility, the gas pressure and temperature can be continuously adjusted, to simulate the practical working pressure and temperature of the tested flowmeter. Therefore, it is suitable for calibrating gas flowmeters, especially those working under high pressure and high temperature conditions. Experimental results show that he proposed facility is effective in calibrating vortex flowmeter at different pressure and temperature.