Measurement FunctionVoltage (t-rms) and frequency Wiring polarity checker, detects broken PE and N wires Insulation resistance Continuity and resistance Measure motor windings with continuity test (@ 10 mA) Loop and line resistance Prospective earth fault current (PEFC/IK) Prospective short-circuit current (PSC/IK) RCD trip time RCD trip current (ramp test) Measures trip time and current for RCD type A and AC in one test RCD variable current Automatic RCD test sequence Phase sequence test Other featuresOn/Off switchable auto-start for RCD and Looptest Self-test Illuminated display Memory