Apparatus and method for detecting electrical resistance...

Details Apparatus and method for detecting electrical resistance... Apparatus and method for detecting electrical resistance...

G - Physics

01

R

G01R 31/04 (2006.01) F24D 19/10 (2006.01) G01D 3/08 (2006.01) G01R 31/28 (2006.01) G01R 27/20 (2006.01)

Patent

CA 2292144

A control system detects an electrical resistance change in a connector coupling a remote mounted temperature sensor to a control system. A control system determines the resistance of the sensor or the connector by selectively charging or discharging a capacitor through a unidirectional circuit element or the sensor. The control system is disclosed as controlling a water heater system, although such control systems may be used to control other systems using remote mounted sensors. A calibrating circuit is used to measure a transient response of an RC circuit, from which resistance can be derived.

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