What does "flow meter" with temperature and pressure compensation mean? When should I use warm pressure compensation?
The air quality of m=29g/mol * 101325Pa * 1m / 8.314J/ (mol / fand K / 293.15K=1205.63g=1.2kg) can be seen from the formula relationship between air quality and temperature pressure, so the instrument measurement to measure the temperature and pressure and automatic compensation.
Significance of temperature and pressure compensationTemperature and pressure compensation usually refers to the measuring data is at the temperature of 25 degrees, the pressure for a standard atmospheric conditions for the measurement of temperature and pressure usually and standards are different, so the general instrument can measure the temperature and pressure field, and then through the calculation formula for automatic compensation of measurement results. For example, air flow measurement, such as the general flow meter orifice flowmeter, dual D, Pakistan Annubar flowmeter etc. are the current volume flow temperature and pressure, but when the volume of air quality by temperature pressure influences the calculation formula is: PV=NRT=>m=MPV/ RT state equation of ideal gas, which is about R constant. 8.314J/ (mol K); P Pa; M gas pressure, the molar mass of the substance is (or mixed gas average molar mass); V m3; T gas volume, system temperature, unit K. In order to approximate the calculation, the temperature is considered as 20 degrees C (293K) at normal temperature, and the gas is approximately ideal gas.
Flow meters are designed to measure gas and steam. Because the gas and steam change with the temperature and pressure, the density will change greatly, and then the mass flow rate will be affected.Therefore, in temperature and pressure changes in the measurement process, need to use the temperature pressure compensation function.
