The M-1000 Analogue Clamp can measure up to 1000A and has been designed according to IEC 1010, it fits in with 600V CAT III of IEC1010 and pollution degree 2 requirements. Can be used to measure DC Voltage and AC Voltage, AC Current, Resistance.Clamp Jaw Dia 48mm, AC Voltage up to 600V, DC Voltage up to 300V, AC Current in the range of 0-50/250/500/1000A AC, Resistance up to 2000K. Ohms, Temperature, Audible continuity Test.