The device complies with the latest seven national standards for power quality and the national standards for general requirements for power quality monitoring equipment. It integrates harmonic analysis, waveform sampling, voltage transient/transient recording, flicker monitoring, unbalance analysis, abnormal waveform capture, event recording, energy measurement, measurement control and other multi-functions.It is integrated and used to monitor system abnormal information and determine whether the power quality meets the standards.The iMeter 7A device samples 1024 points per wave, with high measurement accuracy and full power measurement. It has large-capacity data storage and recording. The recorded data can be saved for more than half a year. It has a high-resolution TFT color screen LCD display and a delicate and beautiful appearance.