Title:
【発明の名称】抵抗型センサによる温度伝送器の自動補正
Document Type and Number:
Japanese Patent JP2002527766
Kind Code:
A
Abstract:
A transmitter in a process control system includes a resistance-based sensor sensing a process variable and providing a sensor output. Self heating circuitry coupled to the sensor provides a self heating signal related to the sensor. Analog-to-digital conversion circuitry coupled to the sensor output provides a digitized sensor output, and transmitter output diagnostic correction circuitry provides an auto corrected output as a function of the self heating signal output or in another embodiment, the transmitter outputs a residual life estimate of the sensor as a function of the self heating index. A novel method of calculating the self heating index is also disclosed, which is applicable to various methods for providing a diagnostic transmitter output.
Inventors:
Elurek, Evren
Warrior, Jogesh
Warrior, Jogesh
Application Number:
JP2000577468A
Publication Date:
August 27, 2002
Filing Date:
October 12, 1999
Export Citation:
Assignee:
Rosemount Incorporated
International Classes:
G01K15/00; G05B23/02; G07C3/00; G08C19/02; (IPC1-7): G01K15/00; G05B23/02; G08C19/02
Attorney, Agent or Firm:
Kazuki Tanaka (1 person outside)