Patent ID: 6016058
Filing Date: 2000-01-18
Classification: G01R,H04M

Abstract:
An in-circuit, wiring verification system for testing circuit wiring installed in an operational electrical circuit that is in use and having a first voltage source, said system comprising:a) means for providing an isolated reference potential to a first location in said operational circuit;b) a second voltage source for successively injecting first and second equal and opposite polarity currents into said operational circuit at a second location, said second voltage source providing voltage with reference to said isolated reference potential;c) means for obtaining a first voltage produced by said first injected current and further obtaining a second voltage produced by said second equal and opposite polarity injected current;d) means for generating a difference signal representing difference between said first voltage and said second voltage;e) means for comparing said difference signal to predetermined threshold values and generating an output signal indicating continuity between said installed wiring and said operational circuit when said difference signal is between said predetermined threshold values.