Patents Assigned to Electro-Test, Inc.
  • Live circuit resistance measurement system and method
    Patent number: 5600255
    Abstract: A method and apparatus for measuring the electrical resistance of a circuit energized with AC power. The invention imposes a known DC current in the circuit under test and senses a resulting DC voltage drop that corresponds to the resistance of the circuit. The invention senses AC overvoltage conditions in the circuit under test and electrically isolates the measuring circuit from the circuit under test.
    Type: Grant
    Filed: November 20, 1995
    Date of Patent: February 4, 1997
    Assignee: Electro-Test, Inc.
    Inventors: John H. Moore, Christopher J. Revak