Source: http://www.google.com/patents/US6449574?dq=7800613
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Patent US6449574 - Resistance based process control device diagnostics - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA device in a process control system includes an electrical element which has a resistance. Self heating circuitry coupled to the element provides a self heating signal related to the resistance of the element. Diagnostic circuitry provides a diagnostic output as a function of the self heating signal...http://www.google.com/patents/US6449574?utm_source=gb-gplus-sharePatent US6449574 - Resistance based process control device diagnosticsAdvanced Patent SearchPublication numberUS6449574 B1Publication typeGrantApplication numberUS 09/616,118Publication dateSep 10, 2002Filing dateJul 14, 2000Priority dateNov 7, 1996Fee statusPaidPublication number09616118, 616118, US 6449574 B1, US 6449574B1, US-B1-6449574, US6449574 B1, US6449574B1InventorsEvren Eryurek, Jogesh Warrior, Andrew T. PattenOriginal AssigneeMicro Motion, Inc., Rosemount Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (112), Non-Patent Citations (130), Referenced by (29), Classifications (17), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetResistance based process control device diagnosticsUS 6449574 B1Abstract A device in a process control system includes an electrical element which has a resistance. Self heating circuitry coupled to the element provides a self heating signal related to the resistance of the element. Diagnostic circuitry provides a diagnostic output as a function of the self heating signal output.
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