Used in conjunction with the C.A 6474 vectorial processing unit, the C.A 6472 offers the possibility of measuring a pylon's earth resistance even if it is part of a parallel earth network, by selective measurement of the pylon in question. With 4 current sensors (Ampflex) positioned around the footings of the pylon and a frequency scan up to 5 kHz, it is possible to measure the earth impedance of the pylon precisely and selectively. Furthermore, the use of flexible sensors means that this concept can be adapted to any pylon geometry.