... , reverse and four rate powers and store their data, it has function of clear, calibrate, the ... rate of electric power and total energy, data storage time for the end of 24 boundaries, ... Control output2.7 Adopt CPU card3 Technical data Electricity data Normal working voltage0.9Un~1.1UnExtended working ... 1.5WApparent power≤10VAData backup battery3.6V≥1200mAhWorking data Clock accuracy≤ 0.5s/d(23°C) ...