Scale Detection on Water Heating Elements
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United States of America Patent
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Issued Date -
Dec 25, 2008
app pub date -
Jul 20, 2006
filing date -
Aug 11, 2005
priority date (Note) -
Abandoned
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Abstract
A method of determining the presence of scale on a water heating element (12), the method comprising comparing signals indicative of heating element temperature to determine whether the compared signals indicate a temperature decrease (44) greater than a predetermined value during a predetermined time interval and determining the presence of scale if the indicated temperature decrease is greater than said predetermined value.
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