Model 3158 - this is instrument for checking dielectric strength of isolation (insulation test at the point of the breakdown) with the digital and analog scale. Testing can pass to automatic regime. For the safety of operator the possibility of remote control and control besides instrument with the aid of the panels (option 9613 and 9614). Testing dielectric strength to 5 kV (ACE 2500 [v]/of 5000 c) standard interfaces (external entrance, output, external switch, RS-232C)