Amprobe AM-140-A TRMS Digital Multimeter Digital multimeter measures alternating current (AC) and direct current (DC) to 10 amp, AC voltage and DC voltage to 1,000 volts (V), resistance to 50 megaohms, capacitance to 10,000 microfarads, line-level frequency to 200 kilohertz (kHz), logic-level frequency to 2 megahertz (MHz), duty cycles to 99%, 4- to 20- milliamp DC loop current, and power to 54.25 decibels relative to miliwatts (dBm) True RMS (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 Can be connected to a computer for data transfer and analysis Instantaneous peak hold records peak positive or negative AC or DC current or voltage measurements lasting for as little as 0.8 milliseconds in duration Meets International Electrotechnical Commission (IEC) safety standard 61010 and is certified for category III installations up to 1,000V and category IV installations up to 600V