Insulation resistance measurement:- measurement voltage any in the range of 501000 V at 10 V and 1000.5000 V at 25 V resolution, - continuous indication of measured insulation resistance or leakage current, - automatic discharge of measured object capacitive voltage after the end of insulation resistance measurement, - acoustic signaling of 5 seconds intervals to facilitate capturing time characteristics, - metered T1 , T2 and T3 test times for measuring one or two absorption coefficients from the range of 1600 s, - adjustable measuring time to 99'59', - polarization index (PI) and dielectric absorption ratio (DAR) measurement, - indication of actual test voltage during measurement, - 1.2 mA and 3 mA test current, - step voltage insulation resistance measurement (SV), - Dielectric Discharge calculation (DD), - protection against measuring live objects, - measurements with test leads up to 20 mDigital filters function for measurements in high noise enviroment (10 s, 30 s , 60 s).Continuity measurement of protective connections and equipotential bonding in accordance with EN 61557-4 with current > 200 mA.