The 5068 is a precision instrument suitable for calibrating and testing general purpose insulation testers with test voltages up to 2.5kV.

It is constructed in a high strength co-polymer plastic case and is powered by a rechargeable battery. This ensures full isolation from the mains and prevents stray leakage. The insulation tester being calibrated can be tested for open circuit voltage and short circuit current. These are displayed on the digital meter mounted on the front panel. Seven selectable precision resistors provide the insulation resistance test. A separate continuity test is provided. Unit is supplied with safety connection leads to allow custom 4mm connectors, low resistance leads, and mains battery recharger.

The 5068 is modelled on the successful and well established 5069 - 9kV InsCal, in a more compact style with a single selector switch.