Amprobe ACD-6 PRO Digital Clamp Meter 600V AC/DC Digital clamp meter measures alternating current (AC) to 1,000 amp, direct current (DC) voltage and AC voltage to 600 volts (V), capacitance to 3,000 microfarads, and resistance to 40 megaohms Average-sensing meter provides accurate readings when measuring linear loads, where the current or voltage has a sinusoidal waveform Transformer clamp with 1.77" (45 mm) jaw opening measures current without touching or interrupting the circuit A relative zero mode stores a reading in memory to use as a zero point for subsequent readings Meets International Electrotechnical Commission (IEC) safety standard 61010 and is certified for category III installations up to 600V