This document introduces the power measurement instruments from HI OKI company, including the 2004 3196 power measurement analyzer and other related products. The instrument has remote control and data collection capabilities, a full range of clamp current sensors, and flexible PC analysis software. It can be used for monitoring and recording power quality, analyzing the causes of faults, and observing power waveforms, recording abnormal waveforms, measuring harmonics and flicker, etc. The instrument can accurately capture various power abnormalities and provide solutions.