Insulation Tester with RS 232 Interface Port can function in different temperature ranges varying from -10 Degree C to +40 Degree C. The Insulation Tester is fitted with RS 232 interface port and offers 2000 m altitude. Insulation Tester is featured with liquid crystal display to show numerals, text and bar-graph. Insulation Tester with RS 232 Interface Port is powered by rechargeable Ni-Cd batteries.