CABLE FAULT LOCATOR APPARATUS AND METHOD WITH REFERENCE VOLTAGE COMPARISON

摘要

Cable fault locator and method in which a calibrated current of constant magnitude is passed through a conductor to provide a known voltage drop per unit length. The drop across a desired portion of the conductor is compared with a reference voltage which is set by a dial calibrated in units of length. The length of the portion of the conductor under test is read directly from this dial. An ohmmeter and voltmeter are provided for discovering and analyzing faults in the cable, and an adjustable voltage source is provided for cancelling the effects of external voltages on the conductors. The entire system is incorporated in a compact highly portable instrument.