... can automatically or manually calibrate and test class below 0.5 single-phase & 3-phase AC/DC ammeter, AC/DC ... 30V, 100V, 200V, 400V, 600V, with fine regulation 0.01%, each step has 20% allowance;3.2. Current output ... steps/positions: 0.1A, 0.5A, 1A, 2.5A, 5A, 10A, 20A, with ... 3.6. Current & voltage output wave form distortion <0.5%;3.7. DC voltage and AC voltage is ...