公开(公告)号：IN183215B

公开(公告)日：1999-10-02

申请号：IN812MA1991

申请日：1991-10-25

Applicant: ROSEMOUNT INC

Inventor： LOFGREN LYLE E ,  SCHULTE JOHN P ,  SEEMANN BRIAN

IPC: G05B6/00

公开(公告)号：ZA9207996B

公开(公告)日：1994-04-18

申请号：ZA9207996

申请日：1992-10-16

Applicant: ROSEMOUNT INC

Inventor： LOFGREN LYLE E ,  SCHULTE JOHN P ,  SEEMANN BRIAN

IPC: G01D5/24 ,  G01L9/12 ,  G01L13/06 ,  G01R27/26 ,  G01R27/28 ,  G01D ,  G08C

CPC classification number: G01L9/125

公开(公告)号：CA2119437A1

公开(公告)日：1993-04-29

申请号：CA2119437

申请日：1992-10-13

Applicant: ROSEMOUNT INC

Inventor： LOFGREN LYLE E ,  SCHULTE JOHN P ,  SEEMANN BRIAN

IPC: G01D5/24 ,  G01L9/12 ,  G01L13/06 ,  G01R27/26 ,  G01R27/28

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 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.

公开(公告)号：ZA927996B

公开(公告)日：1994-04-18

申请号：ZA927996

申请日：1992-10-16

Applicant: ROSEMOUNT INC

Inventor： LOFGREN LYLE E ,  SCHULTE JOHN P ,  SEEMANN BRIAN

IPC: G01L9/12 ,  G01L13/06 ,  G01D5/24 ,  G01R27/26 ,  G01R27/28 ,  G01D ,  G08C

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.

公开(公告)号：MX9205753A

公开(公告)日：1993-04-01

申请号：MX9205753

申请日：1992-10-07

Applicant: ROSEMOUNT INC

Inventor： LOFGREN LYLE E ,  SCHULTE JOHN P ,  SEEMANN BRIAN

IPC: G01L9/12 ,  G01D5/24 ,  G01L13/06 ,  G01R27/26 ,  G01R27/28 ,  H04B3/00

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.