The extra small and handy loop impedance measuring device MZC-304 F from Sonel is used to measure the loop impedance of ZL-PE, ZL-N and ZL-L in 230/400V networks. The test current varies depending on the mains voltage between 7.6A and max. 13.3A. The impedance ZL-PE can also be measured without triggering the RCD. Tests can be accomplished with both test leads and with the handy UNI protective contact adapter. With comprehensive measuring accessories, the measurements can be made in 3-phase networks. Further measurements such as AC voltage, frequency or resistance of the earth conductor can be transferred wirelessly via OR-1 adapter to the PC and evaluated. The device is intended for personnel who carry out measurements in single and multi-family houses, offices, industrial plants and all other locations with a low-voltage system. In addition, the meter is intended for maintenance personnel in objects where short-circuit currents reach 4.4 kA (measurements according to EN 61557). MZC-