The MFT1741 multifunction tester is an instrument designed for testing low voltage electrical installations and especially in locations that suffer from high electrical noise. It provides all the tests required to complete the necessary electrical certification for industrial, commercial and domestic fixed wiring installations. Enhanced non-trip loop impedance measurement technology. "Confidence meter" measurement analysis (patent pending). Full single and 3 phase compliant installation testing. 10 mA to 1 A single and 3 phase RCD testing. Earth testing and stake-less testing for electrode resistance measurement. Simple colour-coded test selection. Automatic start - no need to press TEST so leaving both hands free to hold probes. Internal memory and Bluetooth communications. EN61010 CAT IV safety rating and tough IP54 case.