Thermal-based diagnostic system for process transmitter

Details Thermal-based diagnostic system for process transmitter Thermal-based diagnostic system for process transmitter

2011-04-05

2011-04-05

Allen, Andre J (Department: 2855)

Measuring and testing

Fluid pressure gauge

Diaphragm

C073S724000

Reexamination Certificate

active

07918134

ABSTRACT:
A process transmitter for measuring a process variable in an industrial process comprises a sensor module, a heating device and transmitter circuitry. The sensor module has a sensor for sensing a process variable of an industrial process and generating a sensor signal. The heating device is connected to the sensor module for generating a heat pulse to influence generation of the sensor signal. The transmitter circuitry is connected to the sensor and the heating device. The transmitter circuitry verifies operation of the sensor by measuring a change in the sensor signal due to the heat pulse. In one embodiment of the invention, the heat pulse thermally expands a volume of a fill fluid within the process transmitter. In another embodiment, the heat pulse changes a physical property, such as dielectric, of a fill fluid within the process transmitter.

REFERENCES:
patent: 4777826 (1988-10-01), Rud, Jr. et al.
patent: 5665899 (1997-09-01), Willcox
patent: 5709337 (1998-01-01), Moser et al.
patent: 6295875 (2001-10-01), Frick et al.
patent: 6444487 (2002-09-01), Boggs et al.
patent: 6484585 (2002-11-01), Sittler et al.
patent: 6568278 (2003-05-01), Nelson et al.
patent: 6568279 (2003-05-01), Behm et al.
patent: 7258021 (2007-08-01), Broden
patent: 2005/0072239 (2005-04-01), Longsdorf et al.
patent: 2005/0258959 (2005-11-01), Schnaare et al.
patent: 2005/0274417 (2005-12-01), Perry et al.
patent: 2006/0010983 (2006-01-01), Sund et al.
patent: 2006/0162458 (2006-07-01), Broden
patent: 2007/0068922 (2007-03-01), Westfield et al.
patent: 2007/0138909 (2007-06-01), Mortet et al.
patent: 2007/0241916 (2007-10-01), Hedtke
patent: 2007/0270982 (2007-11-01), Foss et al.
patent: 2008/0223140 (2008-09-01), Broden
patent: 08-35901 (1996-02-01), None
patent: 08-128911 (1996-05-01), None
patent: 08-166309 (1996-06-01), None
patent: 2004-144491 (2004-05-01), None
patent: 2007-047012 (2007-02-01), None
patent: WO 2010042148 (2010-04-01), None
“Tracepak Bundles for Instrument Impulse Lines” from: http://www.obcorp.com/webpages/TubingBundles/TXinstru.htm, visited Apr. 30, 2008, 3 pages.
“Advantage of Electric Tracers” from: www.obcorp.com/WebPages/TubingBundles/TXadelec.htm, visited Apr. 30, 2008, 3 pages.
“Tracepak and Heated Hose Introduction” from: http:www.obcorp.com/WebPages/TubingBundles/TXHH.htm, visited Apr. 30, 2008, 3 pages.
“O'Brien J-Line Jacketed Tubing” brochure, Feb. 4, 2003, 2 pages.
“O'Brien S-Line Preinsulated Tubing” brochure, Feb. 10, 2007, 1 page.
“O'Brien TRACEPAK” brochure, Nov. 1, 2006, 16 pages.
Sittler, Fred et al., “Process variable transmitter with acceleration sensor,” Aug. 6, 2007, U.S. Appl. No. 11/834,221.
Official Search Report and Written Opinion in counterpart foreign Application No. PCT/US2009/005360, filed Sep. 29, 2009.
International Search Report and Written Opinion for PCTUS2009/006007, Jun. 11, 2009.

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