Electrical defect detector for circuit lines

摘要

A device which detects conductors, the device has a portion which applies a current to a conductor consisting of a first frequency signal and a second frequency signal. The frequency of the second frequency signal is double the frequency of the first frequency signal. The device has another portion which detects a DC voltage across the conductor. An adjusting portion adjusts a phase of the first frequency signal relative to a phase of the second frequency signal to produce a zero detected DC voltage across a representative length of conductor known to be free of defects.