Holiday Detector Dm30 - 5kv To 30 Kv

Holiday Detector is an instrument used to detect holes in anti-corrosive coating (electrically insulated) on metallic pipes or surfaces. This test is carried before the pipes are laid underground. The pipe is connected to earth (nominal) and an electrode, charged to high tension, is moved over the coating. At the place of a hole, arcing takes place and the instrument gives alarm. The instrument consists of an electronic oscillator to convert small DC Voltage (12 V) to AC. A high voltage rectifier to give high tension DC output. Holiday Detector is a fully solid state device and has no moving part except the indicator pointer (Digital readout on special demand can be supplied).