The Model 6527 1000-Volt Digital Megohmmeter is a portable multi-range megohmmeter capable of measuring insulation resistance from 1k - 4000M. It is also a multimeter that features an AC/DC voltmeter function capable of measuring up to 600VAC and 1000VDC, continuity test function with audible beeper for resistances under 35 and an overload protection of 600Vrms. In addition, it can measure resistance up to 400k. The TEST button has an associated locking feature for continuous tests up to 15-minutes, eliminating the need to manually hold down the button. This lightweight, easy-to-use megohmmeter can be used for most commonly performed insulation tests, such as on cables, switch gears, motors, DC generators, power tools and small appliances.