In-circuit diode tester

Details In-circuit diode tester In-circuit diode tester

1974-08-22

1976-08-17

Rolinec, R. V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

G01R 3122

Patent

active

039756831

ABSTRACT:
An arrangement is described for testing diodes serially interposed in parallel feed lines between the terminals of a voltage source and corresponding d.c. bus bars. The arrangement provides for in-circuit check out of the diodes by providing a first switching means positioned in the feed line between one side of the diode to be tested and its corresponding voltage source terminal. A second switching means is connected to the other terminal of the voltage source, through an ammeter, to the side of the diode to be tested which is nearest the voltage source. The first switching means is opened and then the second switching means is closed which impresses across the diode a reverse voltage substantially equal to the terminal voltage of the voltage source. The ammeter provides a reading of the cut-off current flowing through the diode. A parallel arrangement including a voltmeter and resistor are provided for doing a reverse voltage check on the diode and a calibration check on the ammeter as required.

REFERENCES:
patent: 2584800 (1952-02-01), Grisdale
patent: 3594641 (1971-07-01), Hoel et al.
Levy, I. J.; "Reverse-Current Tester"; Electronics; Jan. 3, 1958; pp. 88, 90.

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