The Extech 380320 analog high voltage megohmmeter is capable of generating test voltages up to 1 kV to test electrical insulators 380320: Analog Insulation Tester Manual ranging Insulation tester for 250V, 500V, and 1000V test voltages Features: Large easy to read analog display Three test voltages 250V, 500V, and 1000V Insulation Resistance to 400MOhm Lock Power On feature for extended test times Automatic discharge circuit Measures Continuity to 3Ohm, Resistance to 500Ohm, and AC Voltage to 600V Complete with heavy duty test leads, alligator clip test lead, 6 x AA batteries, hanging strap and hard carrying case Specifications: Test Voltage 250V/500V/1000V Insulation Resistance 0 to 100MΩ, 0 to 200MΩ, 0 to 400MΩ Accuracy ±5% of scale AC Voltage 0 to 600V Accuracy ±5% of scale Resistance 1 to 500Ω Accuracy ±3% of scale Continuity 3 Accuracy ±3% of scale Dimensions 7.9 x 3.6 x 2” (200 x 92 x 50mm) Weight 1.2lbs (546g) includes batteries 380320 Extech Insulation Tester Megohmeter เครื่องวัดความเป็นฉนวน