CONSIDERATION OF EFFECTS OF AMBIENT TEMPERATURE ON MEASURING ACCURACY OF DIAPHRAGM GAS METERS
MASSAH J. 1, MOHAMMADIFAR H. 2, KHAZAEI J. 1 1. DEPARTMENT OF AGROTECHNOLOGY, COLLEGE OF ABOURAIHAN, UNIVERSITY OF TEHRAN, IRAN.
2. ENGINEER, HEAD OF TECHNICAL OFFICE, HADID SAZEH PISHRO CO., TEHRAN, IRAN.
Aim of this research was to notice the effects of ambient temperature on flow rate measured meters on the medium (0.2Qmax) and maximum (Qmax) consumption flow rate. In this research, the G4 diaphragm gas meter was considered. Since this was one of the most consuming gas meters in Iran. Advantages of this research were to estimate the correct amount of using gas and calculating the correct fee for the user. It is also considered the effects of environment temperature on flow rate of measured diaphragm gas meter , which the effects of it is not mentioned in Iranian Gas Standards (IGS), and Gas Meters - Diaphragm Gas Meters-DIN EN 1359; 1993. Based on the results, cold temperature could cause more errors than warm temperature. Cold temperature did cause the meter's measurement show less amount (negative errors), and warm temperature did cause the meter's measurement show more amount (positive errors), in cold ambient the rate of error in meters at 0.2Qmax was more than Qmax, and in warm ambient the rate of error in meters at 0.2Qmax was less than Qmax.
