Insulation resistance measurement:
– selected test voltage: 50, 100, 250, 500, 1000 V,
– continuous indication of insulation resistance or leakage current,
– automatic discharge of capacitance of tested object after the insulation resistance measurement,
– acoustic signalling of five-second periods to facilitate obtaining time characteristics,
– indication of actual test voltage during the measurement,
– protection against measuring live objects,
– three-lead measurement.