The UT593 is a multifunction tester suitable for testing RCD, loop/line impedance, earth resistance continuity, insulation resistance and AC/DC voltage. It is applicable to electrical installation, inspection and repair at home or in construction industry. 9999-count LCD display with analogue bar 50V~1000V DC insulation resistance test 200mA earth-resistance continuity test Loop impedance/Prospective Fault Current (PFC)/Prospective Short Current (PSC) test Lock test RCD trip time test and the data storage with one key Full/Half wave and count downing (30s) test mode selectable 0°/180° phase angle option to detect the fastest trigger time Trip current test of RCD trip time X2 RCD trip trigger current test Phase sequence and missing test AC/DC voltage auto check and test Connection check with status real-time display White backlight; auto power off Certifications: CE