... and communication lines, etc. It is widely used in electric power, telecommunications, meteorology, railways, oil field, construction, measurement, ... manner, locating insulation faults and repairing electrical lines.Power sourceDC6V, alkaline battery LR6 1.5V×4Testing MethodSplitcore ... .8V. In this case, the measured values are still accurate. Rated Powerabout 5mA at the power-saving mode, maximum ...