â·ÃÊͺ¶ÒÁÃÒ¤Ò The Extech MG302 is a true RMS Multimeter that measures the insulation resistance of transformer windings and gives accurate readings of distorted waveforms MG302: 13 Function Wireless True RMS MultiMeter/Insulation Tester MultiMeter/1000V Insulation Tester with Wireless PC interface (433MHz) Features: Wireless USB interface transmits measurement data to a PC Backlit super large triple display 125V, 250V, 500V, and 1000V test voltages Insulation Resistance from 0.001MOhm to 4000MOhm Auto discharge of capacitive voltage Lock Power On Function for hands-free operation Data Hold, Min/Max, Relative mode, Auto power off Complete with USB receiver, Windows® software, test leads & alligator clips, bead wire temperature probe, carrying case and batteries USA, Mexico, and Canada use 915MHz model MG300 and majority of other countries use 433MHz model MG302 Specifications: Multimeter AC Voltage 1000V 0.1mV ±1% DC Voltage 1000V 0.01mV ±0.06% AC Current 10A 0.1µA ±1.5% DC Current 10A 0.01µA ±1.0% Resistance 40MΩ 0.01Ω ±0.3% Capacitance 40mF 0.001nF ±3.5% Frequency 100MHZ 0.001HZ ±0.1% Duty Cycle 0.1 to 99.9% 0.01 ±1.2% Temperature -58 to 2192°F -50 to 1200°C 0.1°F 0.1°C ±1% + 4.5°F ±1% + 2.5°C 4-20mA% -25 to 125% 0.01% Continuity/Diode Yes Power source 6 x AA batteries Dimensions 7.8 x 3.6 x 1.9” (200 x 92 x 50mm) Weight 20.5oz (582g) Extech Insulation Tester MG302 Multimeter ÁÑŵÔÁÔàµÍÃì