Chauvin Arnoux CA 6474 [P01126511] Earth and Ground Resistance Tester  Kit. The Chauvin Arnoux CA 6474 is designed for use with the C.A 6472 earth tester to measure earthing of pylons. When used with the CA 6472, the C.A 6474 allows global earth of pylons, earth resistance of each of the pylon's footings, quality of the overhead protective earth cable connection, active measurement (injection by the C.A 6472) and passive measurement (use of stray currents) measurements. It comes with c/w 4 x 8m AmpFlex and accessories (requires CA6472).