Automatic diagnostic test modes of Insulation resistance, PI, DAR, DD and Step Voltage test. Also measures test voltage, test current and capacitance. Mains and battery operation mode (In case of Full Battery Discharged/ Dead/ Damaged conditions; Instrument can also work on AC mains supply independently). LCD display with pleasant blue backlit. Built in memory to store upto 1000 test result. Optically isolated communication port. Software for data management. Scrolled display of test result at the end of each test. Three programmable time T1, T2 &T3, IP 54 rated.