Title:
プロセス伝送器及び熱型診断法
Document Type and Number:
Japanese Patent JP5735427
Kind Code:
B2
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.
Inventors:
Hedke, Robert, Sea.
Willcox, Charles, Earl.
Broden, David, A.
Krosinski, Andrew, Yuri
Schulte, John, Pee.
Willcox, Charles, Earl.
Broden, David, A.
Krosinski, Andrew, Yuri
Schulte, John, Pee.
Application Number:
JP2011531014A
Publication Date:
June 17, 2015
Filing Date:
September 29, 2009
Export Citation:
Assignee:
Rosemount Incorporated
International Classes:
G01L27/00; G01L13/02; G05B23/02
Domestic Patent References:
| JP2003156401A | ||||
| JP2002544514A | ||||
| JP1114484A | ||||
| JP464726U | ||||
| JP6361929A | ||||
| JP200174578A | ||||
| JP58193432A | ||||
| JP5130777A | ||||
| JP2004511765A | ||||
| JP2003337076A |
Attorney, Agent or Firm:
Nobuyuki Okajima