Gas Measuring methodology we used for calibration based on fundamental orifice gas metering. A set of system measurement involved temperature measurement and pressure measurement which is feed the reading to the flow computer.
The procedure for calibration is set up to ensure valid reading of temperature and pressure sensors. this we used certified temperature calibrator for testing the temperature measurement and Death Weight Tester for testing the pressure measurement.
Then, parameter of measurement is feed to the flow computer to calculate the volume.
another end of the system is to detect gas composition for determining volume of a certain gas using gas chromatograph.
However valid actual measurement will be compared to AGA-3 calculation to determine the acceptable measurement using software based manual calculation.