insulating oil tester with variable test voltage from 0 to 60, 75, 80, 90 or 100 kV Test ... self-contained,compact and portable giving smoothvariable test voltage from 0 to 60, 75, 80, 90 or 100 kV for ... RS 232 InterfaceRS 232 interface is very easy to use to communicate stored data which can be saved in ... analyzer insulating oil tester with variable test voltage from 0 to 60, 75, 80, 90 or 100 kV