Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Patent
1996-11-18
2000-04-25
Do, Diep N.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
324682, 324555, G01R 1152
Patent
active
060548649
ABSTRACT:
A capacitor test apparatus for checking the capacitance of a capacitor without removing the capacitor from the circuit. Selection of the designated capacitance of the capacitor by means of a user-actuated selector switch automatically selects a test signal frequency such that the reactance of the capacitor matches a reference impedance. A indicator circuit compares the actual reactance with the reference impedance to indicate the deviation of the test capacitor from its designated capacitance. The test signal is a low level sine wave which does not exceed the conduction threshold of semiconductor junctions associated with the capacitor. A user-actuated switch is provided for discharging any charge present on the capacitor prior to testing.
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Cummings Eugene M.
Do Diep N.
Solis Jose M.
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