1)Able to calibrate the electronic and inductive watt-hour meter, meter types cover single/three phase, multifunction, multi-rate and prepayment; 2)Can perform automatic measuring like shunting, starting, basic errors, standard deviation and etc. 3)Can test the error caused by voltage, current, harmonic, reverse-phase and voltage unbalance; 4)Can check the same type meters with different constant; 5)GPS system is applied to verify the meter? clock 6)Available to print all kinds of test reports with the standard forms;