METHOD AND APPARATUS FOR CORRECTING A MEASURED VOLUME OF A FLOWING GAS

摘要

A method for correcting a measured volume of a flowing gas, in which the measured volume of the flowing gas is corrected on the basis of temperature and pressure of the gas, as well as of a correction factor characterising the gas, wherein from a basic correction factor corresponding to a nominal composition, pressure and temperature of the gas, on the basis of the measured pressure and temperature of the flowing gas, a modified correction factor is determined, and the corrected volume is determined on the basis of the measured pressure, temperature and the modified correction factor. The invention relates also to an apparatus for correcting a measured volume of a flowing gas, the apparatus comprising a sensor (6) for sensing pulses coming from a gas meter, a temperature sensor (2) for measuring temperature of the flowing gas, a pressure sensor (3) for measuring pressure of the flowing gas, and a central unit (1) for correcting the measured volume on the basis of the temperature measured by the temperature sensor (2), the pressure measured by the pressure sensor (3) and a correction factor characterising the flowing gas, wherein the central unit (1) is designed for calculating a modified correction factor on the basis of the temperature measured by the temperature sensor (2) and the pressure measured by the pressure sensor (3) from a basic correction factor corresponding to a nominal composition, pressure and temperature of the gas, and for determining the corrected volume on the basis of the measured pressure and temperature as well as the modified correction factor.