Inductive cable resistance tester

Details Inductive cable resistance tester Inductive cable resistance tester

1991-06-04

1993-02-23

Wieder, Kenneth A.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

324127, 324691, 324601, 324718, 336175, G01R 2714

Patent

active

051893754

ABSTRACT:
A technique and apparatus for measurement of resistances of 0.01 ohm and s without disconnection from the circuit. The invention is used for measurement of degradation in cable shields by measuring the droop caused by circuit resistance in an induced current pulse in the undisconnected circuit. The method can also be used for measurement of junction resistances in high current circuits such as auto starters. The invention allows measurements to be made with the circuits connected so that the faults are present in the measurement setup. The method includes inductive coupling of long duration repetitive current pulses onto the circuit under test, measurement and display of induced current pulses, and display of induced current pulses on an oscilloscope.

REFERENCES:
patent: 3771049 (1973-11-01), Picclone
patent: 3783382 (1974-01-01), Reynolds
patent: 3863148 (1975-01-01), Fellrath et al.
patent: 4788470 (1988-11-01), Kohzuki et al.
patent: 4841229 (1989-06-01), Eccleston

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