The temperature effect on measurement accuracy of the smart electricity meter

Abstract

The paper presents an analysis of ambient temperature influence on measurement accuracy of the smart electricity meter for different values of load current, voltage and frequency. The research scope was covered by the operating temperature range from-40°C to +70°C, which is consistent with the requirements of applicable standards and legal regulations. A meter used in the conducted tests was Iskra MT372 model, which is currently being installed at final customers. Streszczenie. W artykule przedstawiono analizę wpływu temperatury otoczenia na dokładność pomiarów inteligentnego licznika energii elektrycznej dla różnych wartości prądu obciążenia, napięcia i częstotliwości. Badania swoim zakresem objęły temperatury od-40ºC do +70ºC, co jest zgodne z wymaganiami stawianymi inteligentnym licznikom zarówno przez normy, jak i regulacje prawne. W badaniach wykorzystano obecnie instalowany u odbiorców licznik typu Iskra MT372. (Wpływ temperatury na dokładność inteligentnego licznika energii elektrycznej).

Wireless Temperature Measurement Validation Method for PCR Machines by Magnetic Hall-Effect Sensor

“…where, first Planck's constant (C1) is 3,74 * 10 -16 Wm 2 and second Planck's constant (C2) is 1,44 * 10 -2 Km. However, the cover of the PCR machine sometimes insulates the heat inside, because the heat generated by the machines needs to be isolated to make all the electrical systems inside the PCR machine work correctly [7]. This isolation is also created to make zero heat transfer to the environment, making the PCR machine high efficiency.…”

“…Measuring temperature based on infrared signals [7] might solve the problem, but infrared signals are difficult to penetrate through thicker casings or walls [8]. This makes the heat from the PCR machine not much radiated further the infrared signal will be detected at lower levels [9].…”

“…This makes the heat from the PCR machine not much radiated further the infrared signal will be detected at lower levels [9]. Moreover, the infrared sensor signal will be mixed with the infrared signal that radiates from the surface of the hard case of PCR machines [7]. This mixed signal will make ambiguous data during the heating process, and this condition would make the measurement data received from the infrared signal is invalid [8].…”