... AC 220V, 5A, voltage undulations: ≤±10%, power capacity:≥0.5KVA(5) Good grounding device, grounding resistance≤4Ω(6) Power ... cooling;Tube voltage: 30KVPTube current: 0~5mA, adjusted successively;(2) Total power: ≤0.3KW(3) Sensitivity: excel to 10 ... preset the digital switch to the 13.20.0,and then press the reset key, or you ... set the digital switch to the 00.00.0, if you like then press the reset key ...