Method of, and apparatus for, monitoring the operation of electr

Details Method of, and apparatus for, monitoring the operation of electr Method of, and apparatus for, monitoring the operation of electr

1988-05-09

1989-09-26

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Electromechanical switching device

Relay

324546, 340644, G01R 3100

Patent

active

048703648

ABSTRACT:
The operation of an electromagnetic valve is monitored by connecting the coil of the valve to a d.c. source for a period of time sufficient to permit the current in the coil to reach its maximum steady state value then disconnecting the coil to permit the current to fall and re-connecting the coil to the source again and measuring the current which is established in the coil.

REFERENCES:
patent: 3988664 (1976-10-01), Beery et al.
patent: 4692939 (1987-09-01), Parsons
patent: 4712071 (1987-12-01), Charbonneau et al.
patent: 4746869 (1988-05-01), Schrag et al.
patent: 4764729 (1988-08-01), Yakuwa et al.

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