Title :
Microprocessor-based electric power/demand analyzer
Author :
Liangduo, Zhang ; Zhang Yingang ; Zhenjiang, Hu
Author_Institution :
Harbin Inst. of Technol., China
Abstract :
A description is given of the electric power/demand analyzer (EPDA), a high-precision, multifunction, microprocessor-controlled electric power and demand indicating and recording instrument. The EPDA has less than 0.2% error for AC voltage/current measurements, and less than 0.5% for AC power/energy measurements. If a drop or loss of power occurs, a rechargeable battery maintains normal operation for thirty minutes. After that time, EPDA will automatically switch on standby mode while retaining its memory for up to thirty days
Keywords :
computerised instrumentation; electric current measurement; multimeters; power measurement; voltage measurement; AC power/energy measurements; AC voltage/current measurements; electric power/demand analyzer; indicating instrument; microprocessor based instrument; multifunction instrument; rechargeable battery; recording instrument; standby mode; Battery charge measurement; Clocks; Current measurement; Data communication; Instruments; Keyboards; Printing; Sampling methods; Switches; Voltage;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1988. IMTC-88. Conference Record., 5th IEEE
Conference_Location :
San Diego, CA
DOI :
10.1109/IMTC.1988.10865
