They use the “Easy Go” test system, which is easy to operate, interprets the results and requires minimal training to find faults. On-board is a TDR with a 7.6 km range and arc reflection at 3 or 4 kV respectively for pre-locating. For pinpointing, EZ-Thump offers a surge energy of 500 J, at 1.5 and 3 kV or 4 kV respectively, d.c. testing for breakdown detection and insulation resistance measurement.