Calibrating device for dc electric energy meter

The utility model provides a calibrating device for a dc electric energy meter, comprising a tested dc electric energy meter, a standard resistor, a control computer, and a dc voltage source, a dc current source, a counter, a digital voltmeter and a DCC (direct current comparator) type current proportioner connected with the control computer respectively. Voltage signals generated by the dc voltage source are connected with the digital voltmeter and the voltage input end of the tested dc electric energy meter in parallel; current signals generated by the dc current source are successively connected with the current input end of the tested electric energy meter and the input end of the DCC type current proportioner in series; the DCC type current proportioner is connected with the digital voltmeter via the standard resistor; and pulse output signals of the tested dc electric meter are input into the counter. The calibrating device can calibrate dc electric meters or dc standard electric meters connected directly or via a mutual inductor, wherein the calibrating range is 0-1200V and 0.1-1000A, and the calibrating result can reach national standard.