... consists single phase high precision program controlled power source and single phase reference standard. Main CharactersThe portable device consists single phase ... reactive power, apparent power, frequency and etc.It can test 1 ~3 energy meters at the same time, the error ... 1A, 5A, 20A, 100AMax output power: 50VA for voltage output, 100VA for current output(100A range)Adjustment of the output voltage ...