... , transmitter and electric energy meter, etc. Checking AC sample device error. The instrument type are the verification: AC/DC voltmeter, ... independently Automatic failure detection, can prevent the damage of equipment wrong operation Many kinds of models the device preset portable ... three-phase phase voltage ±0.2 °. DC output voltage (including auxiliary range) • range mV: 45, 50, 60, 75, 100 V ...