Method of testing the function of load resistors connected in pa

Details Method of testing the function of load resistors connected in pa Method of testing the function of load resistors connected in pa

1987-01-29

1989-07-18

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

219483, 219486, 324502, 324522, G01R 3102

Patent

active

048497010

ABSTRACT:
Load resistors connected in parallel in a heating circuit having switches operable to connect and disconnect the resistors from a common supply line for heating a plurality of zones to maintain predetermined temperatures therein, are tested by disconnecting all of the load resistors from the supply line to begin a testing operation. Any current conducted when all load resistors are disconnected from the supply line is measured, after which the load resistors are then individually and successively reconnected to the supply line. The current then conducted from the supply line in succession to the load resistors is measured and compared with reference values of current through the load resistors when functioning properly.

REFERENCES:
patent: 2567859 (1951-09-01), Ringo
patent: 3286130 (1966-11-01), Clinton
patent: 3551796 (1970-12-01), Holder et al.
patent: 3892946 (1975-07-01), Rimmi
patent: 4421976 (1983-12-01), Jurek
patent: 4604518 (1986-08-01), Payne

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