Resistance based process control device diagnostics
US6449574B1 · kind B1 · utility
64Cited by
161References
38Claims
0Family size
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Key dates
| Filing date | Jul 14, 2000 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | Jul 14, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08C19/02
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.