Amprobe ACDC-100 TRMS 1000A AC/DC Digital Clamp Meter Digital clamp meter measures alternating current (AC) to 800 amp direct current (DC) to 1,000 amp, DC voltage and AC voltage to 600 volts (V), capacitance to 3,000 microfarads, and resistance to 40 megaohms True Rms MS (root mean square) sensing meter provides accurate readings when measuring linear or non-linear loads, where the current or voltage has a sinusoidal or nonsinusoidal waveform Hall-effect current clamp with 2" (50mm) jaw opening current without touching or interrupting the circuit inrush reading measurement displays of entire motor inrush period startup Meets International Electrotechnical Commission (IEC) safety standard 61010 and is certified for category III installations up to 600V