This installation safety tester is the ultimate model capable of carrying out safety tests on civil and industrial electric systems in compliance with standard IEC/EN61557-1. Thanks to the capacitive TFT color touch screen, this instrument is extremely simple and intuitive to use despite a lot of internal features which are really complicated in the universe of measurement devices. The instrument allows saving all measurement results in internal memory and transferring the saved data onto a PC by means of both optical/USB and optical/Wi-Fi interfaces (with optional C2013 accessory) in order to print useful measuring reports, to be attached to the Declarations of Conformity, with the aid of the dedicated software supplied. It also carries out loop/line impedance measurements and calculate the prospective short-circuit current with high resolution (0.1m) with the aid of optional accessory IMP57 in way to obtain precise measurement results, also near HV/LV transformation cabs and, therefore, also allows correctly choosing the appropriate protections in industrial systems. Other possible tests performed by the instrument are the breakdown current, tripping time current, I2t test related to MCB with curve B, C, D, K and fuse type gG and aM and the leakage current measurement with the aid of optional accessory HT96U. Thanks to the optional clamp T2100, it is also possible to evaluate in a quickly way the resistance of earth probes without the disconnection from the earth system.