对电压电流温度等进行采样，并在1602显示屏上进行循环显示；发生故障时，也在屏幕上显示；同时具有万年历功能，断电后保存故障具体信息，如故障信息和故障发生时间，通电后再屏幕上显示出来。-The voltage and current, temperature sampling, and in 1602 display loops show failure, but also the screen display also has a calendar function, after the p