Megger MPU690 Two Pole Tester Proving Unit Good practice requires that two pole voltage detectors are proved to be functioning correctly on a known voltage source, both before and after they have used to verify that a circuit is not live. The Megger MPU690 proving unit provides a portable battery operated voltage source that can verify the correct functioning of a two pole voltage detectors. Features: 5 stepped nominal output voltages Automatic operation High output power suitable for test lamps Extended battery life Magnetic base Rugged case Specifications: Output voltage: 50 - 690 volts in five stages: 50 V, 100 V, 230 V, 400, 690 V Power output: 10W max. Power On / Off: Automatic on when probes are inserted into output terminals / auto off Indicators: 5 LEDs for output voltages plus power LED Power supply: 6 x AA / LR06 alkaline batteries Operating temperature: -10°C - +40°C Humidity: 70% Rh Dimensions: 130 mm (W) x 68 mm (H) x 48 mm (D) Weight: 346 g Data Sheet: Click Here for Data Sheet