This energy meter measures the single-phase AC active enrgy of rated frequency of 50/60Hz.It conforms to the whole request of GB/T17215-2002 standard 1class. Function: 1.This Meter can be read by radio communication. 2.This meter integrates multi-functions to realize active (Bi-direction) energy measuring and displaying. 3.This meter has the reading function at the power-off. After the power supply is disconnected, the meter data still can be read by Hand Held Unit(HHU) with radio communication device (Radio Kit). 4.It has tamper and fraud protection functions against phase lines wrong-connecting, i.e., Line in & Line out reversal, bypassing, short circuit in current circuit, external magnetic field influence and DC influence, etc., as well as recording, warning and displaying tamper occurrence. 5.The energy meter's active energy consumption data and the operation states can be transmitted through Hand Held Unit (HHU). Applicable conditions: Ambient temperature: -25 ℃ ~ 65 ℃, maximum relative humidity: 100% Operating voltage range: 220/230/240V (-30% - +20%), frequency range: 50/60Hz ± 5%. Electrical Features Accuracy Class Class 1.0 Rated Voltage 220V/230V/240V Rated Frequency 50Hz Start Current 0.002Ib Voltage Circuit Power Consumption <=1.0W,6VA Current Circuit Power Consumption <=0.5VA Display LCD Nominal Current 10(60)A Meter's Constant 800/1600imp/kWh Running With No Load Protecting Against Running With No Load Circuit Operation Voltage Scope 220/240V Physical Features Weight 0.5Kg Outside Size 133.5mm*118mm*51mm Ambient Temperature -25'C-6'C Max Relative Humidity 100%