... automatically or manually calibrate and test class below 0.5 single-phase & 3-phase AC/DC ... 100V, 200V, 400V, 600V, with fine regulation 0.01%, each step has 20% allowance;3.2. ... output steps/positions: 0.1A, 0.5A, 1A, 2.5A, 5A, 10A, 20A, with fine regulation 0.01%, each step ... has 20% allowance;3.3. Frequency output range: 45~65Hz, with fine regulation 0 ...