Measurement RangeResolutionAccuracyDC Voltage30 ~ 600V29Model UT512: OPERATING MANUALDetailed Accuracy SpecificationsAccuracy: ([% of reading] + [number of least significant digits), guarantee for 1 year.Operating temperature: 18 ~28Relative humidity: 45~75%RHA. Voltage MeasurementAC Voltage30V~600V (50/60Hz)1V(2%+5) <100V: (2%+8)100V: (2%+5)