Title:
【発明の名称】2重極板型容量圧力伝送器の容量温度補償方法および装置
Document Type and Number:
Japanese Patent JP3233404
Kind Code:
B2
Abstract:
A two wire transmitter responsive to a pressure differential sensor includes a fixed module and a removable module. The fixed module is adapted for connection to an analog removable module having a compensation capacitance MACDA or a digital removable module having compensation capacitance CDD. Capacitance compensation circuitry is included in the fixed module which includes a compensation capacitance CDM which is selected whereby MACDA equals CDD when the analog removable module and the digital removable module are calibrated. This provides a pressure transfer function which is more linearized and less susceptible to temperature variations.
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Inventors:
Lofgren, Lyle E.
Schulte, John Pee.
Seaman, brian
Schulte, John Pee.
Seaman, brian
Application Number:
JP50776493A
Publication Date:
November 26, 2001
Filing Date:
October 13, 1992
Export Citation:
Assignee:
Rosemount Incorporated
International Classes:
G01L9/12; G01D5/24; G01L13/06; G01R27/26; G01R27/28; (IPC1-7): G01L13/06
Domestic Patent References:
| JP59180339A | ||||
| JP5264953A | ||||
| JP62182619A | ||||
| JP5771094A | ||||
| JP6098328A | ||||
| JP62140040A | ||||
| JP363297U | ||||
| JP642133U | ||||
| JP61292517U | ||||
| JP57502230A |
Attorney, Agent or Firm:
Michito Hiraki (1 person outside)