... digital phase meter 1.Direct measurement of the AC Current,voltage,Phase 2.Indirect measures of the power factor ... clamp approximate geometric center2. General Specification FunctionPhase, AC current, AC voltage, AC leakage current, Direct phase sequence test; Transformer group ... tolerant duration when input 500V/50Hz sine wave AC voltage between the U1 and U2 input electrodesInsulationBetween meter ...