The Time Electronics 5069 INSCAL insulation tester calibration system is a precision, portable test instrument suitable for calibrating and testing general purpose insulation testers with test voltages up to 10kV. The Time Electronics 5069 INSCAL insulation tester calibration system has a basic accuracy of 1% with a range of 10M ohm to 100G ohm in 4 decades. The Time Electronics 5069 INSCAL insulation tester calibration system 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. Other features of the Time Electronics 5069 INSCAL insulation tester calibration system include fully shrouded safety connectors, a 0 - 2kV or 0 - 10kV display of open circuit voltage and a 0 - 2mA or 0 - 20mA display of short circuit current.