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Patent US6594603 - Resistive element diagnostics for process devices - Google PatenteSuche Bilder Maps Play YouTube News Gmail Drive Mehr » Erweiterte Patentsuche | Webprotokoll | Anmelden Erweiterte Patentsuche PatenteDiagnostic circuitry of a process device is used to detect degradation of a resistive element of the process device while the process device remains online and without an additional power source. The diagnostic circuitry includes a testing circuit and a processing system. The testing circuit is coupled...http://www.google.de/patents/US6594603?utm_source=gb-gplus-sharePatent US6594603 - Resistive element diagnostics for process devices Ver�ffentlichungsnummerUS6594603 B1PublikationstypErteilung Anmeldenummer09/409,114 Ver�ffentlichungsdatum15. Juli 2003Eingetragen30. Sept. 1999 Priorit�tsdatum19. Okt. 1998Auch ver�ffentlicht unterCA2346095A1, CN1183377C, CN1323389A, EP1131614A1, US6519546, WO2000023776A1 Ver�ffentlichungsnummer09409114, 409114, US 6594603 B1, US 6594603B1, US-B1-6594603, US6594603 B1, US6594603B1 ErfinderEvren Eryurek, Steven R. EsboldtUrspr�nglich Bevollm�chtigterRosemount Inc.Patentzitate (107), Nichtpatentzitate (123), Referenziert von (24), Klassifizierungen (17) Externe Links: USPTO, USPTO-Zuordnung, EspacenetResistive element diagnostics for process devicesUS 6594603 B1 Zusammenfassung Diagnostic circuitry of a process device is used to detect degradation of a resistive element of the process device while the process device remains online and without an additional power source. The diagnostic circuitry includes a testing circuit and a processing system. The testing circuit is coupled to the resistive element and is configured to apply a test signal to the resistive element. The test signal heats the resistive element and causes the resistive element to generate a response signal. The processing system compares a time constant of the response signal to a corresponding reference to detect degradation of the resistive element.
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