CH400變壓器電量測量儀系列可廣泛用于各種小型變壓器或整流器電源等廠家的生產流水線測試，實驗室試品試驗等場合。該系列儀器采用數字同步采樣及微機技術，能準確測量變壓器的初級電壓、電流、功率、功率因數的真有效值，次級電壓、電流的真有效值（交流）或平均值（直流），次級電壓紋波的真有效值。內置電子負載能方便的進行空、負載轉換測試。具有測試速度快、精度高、使用方便、顯示直觀等優點。

CH400 transformer coulometer can be widely applied in test on production line of small manufacturer of transformer or rectifier power or in labs. The meter adopts digital synchronous sampling and micro technology to accurately measure true RMS of transformer’s primary voltage, current, power, power factor, true RMS (AC) or average (DC) of secondary voltage and current, true RMS of secondary voltage ripple. Built-in electric load can make the instrument conveniently perform idling/load conversion. The meter has the characteristics of having high speed, high accuracy, easy operation and direct display.