The INSCOPE140 is a high performance 3-phase Time Domain Reflectometer (TDR) for pre-locating cable faults primarily in underground power cable networks from low to high voltage. The rugged design and a powerful measurement impulse of 160V make it ideally suited for demanding field measurement tasks. Supporting all relevant TDR-HV modes, the instrument’ capabilities can be further increased by combining it with a suitable HV source and coupling filter. As a result, the precise location of high resistance and intermittent faults is possible. The bright colour display, minimal controls and an easy to navigate user menu simplify operation.