Heating element condition monitor

Details Heating element condition monitor Heating element condition monitor

2005-10-18

2005-10-18

Nguyen, Hung (Department: 2636)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S654000, C340S655000, C340S870160, C340S870170, C340S870280

Reexamination Certificate

active

06956489

ABSTRACT:
A method for monitoring the condition of an electric current-carrying heating element involving installing the heating element in a location and setting the initial composition Ciof the material as a reference baseline at an initial time Ticorresponding to said installation of the heating element. Data is then collected reflecting the subsequent composition Csof the heating element material after a subsequent time Tsat the installed location and any change in the material composition of the heating element between Tiand Tsis monitored. An alarm is sent when the change reaches a threshold value indicating a possible failure condition. According to one embodiment, an impedance monitor is provided that calculates and compares impedance at the required levels of accuracy to determine changes in material composition. The impedance monitor, or portions thereof may be embedded within a microcontroller for increased portability and functionality.

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