Electrical circuit test devices

Details Electrical circuit test devices Electrical circuit test devices

G - Physics

01

R

324/58

G01R 19/00 (2006.01) G01R 1/067 (2006.01) G01R 19/14 (2006.01) G01R 19/145 (2006.01)

Patent

CA 1101072

A B S T R A C T This invention relates to a test device for detecting an electric voltage and/or its polarity or the flow of current through an electrical conductor. Two luminescent diodes connected in antiparallel circuit are connected in series with as well a ceramic cold conductor thermistor, a keying switch, a battery and a protective diode. The battery provides a voltage when testing for flow of current is carried out. Further safety features guarantee that no damage to the device or to its user can occur when high voltages are tested. For example a zener diode may be connected across the keying switch.

301450

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