17th edition tester that offers CAT IV, fast and repeatable results for 2 and 3-wire non-trip loop testing, auto RCD testing and adding phase rotation. Adjustable continuity and insulation resistance buzzer threshold. 3-phase RCD testing with no earth and current measurement with the optional clamp. Simple colour-coded test selection with large bright LCD screen display. Tester also brings a 100V insulation test range, true RMS voltage measurement, mV sensor input and Type B RCD testing. Supplied in a robust moulded case. IP54 rated.