公开(公告)号：DE69420853D1

公开(公告)日：1999-10-28

申请号：DE69420853

申请日：1994-07-29

Applicant: ROSEMOUNT INC

Inventor： LOUWAGIE BENNETT ,  MUNSON GREGORY ,  WIKLUND DAVID ,  ZWEBER MICHAEL ,  BRODEN DAVID ,  BISCHOFF BRIAN ,  CORPRON GARY

IPC: G01F1/36 ,  G01F1/88 ,  G01F15/06 ,  G01F23/14 ,  G01F23/18 ,  G01L7/08 ,  G01L9/04 ,  G01L19/00 ,  G01L19/08

Abstract: A two-wire transmitter senses a pressure using an internal pressure sensor. The transmitter includes an input for receiving a process variable from a remote sensor which is separated from the transmitter. Circuitry in the transmitters transmits information on a two-wire process control loop which is related to the sensed pressure and the process variable.

公开(公告)号：DE69415662T2

公开(公告)日：1999-07-29

申请号：DE69415662

申请日：1994-04-12

Applicant: ROSEMOUNT INC

Inventor： LOUWAGIE BENNETT ,  LEMIRE STEVEN ,  EVERETT CRAIG

IPC: G01L19/06 ,  G01L7/08 ,  G01L19/00

Abstract: An isolator diaphragm is formed and connected to a support member so it will withstand periodic high pressure cleaning. Such periodic cleaning includes use of heated, concentrated cleaning solutions flowing under high pressure from a nozzle which moves rapidly over segments of an exposed surface of the isolator diaphragm. The present invention prevents isolator diaphragm failure precipitated by the substantially incompressible isolator fluid driven toward the perimeter of the diaphragm during cleaning operations. Such cleaning operations generate a separating force between the isolator diaphragm and diaphragm support. The isolator diaphragm has a peripheral wall portion bonded to a planar support surface and is formed to have an offset center region. The peripheral wall and center region are joined by a conical, inclined wall bounding the center portion. The support member has a correspondingly shaped recess with an inclined annular wall that supports the conical wall of the diaphragm. The primary diaphragm flexure point of the center portion of the diaphragm is moved away from the perimeter of the diaphragm, to adjacent the junction of the inclined wall and the center region. The bonding area is not subjected to a high separating force due to the movement in the incompressible fill fluid to a localized region of the diaphragm adjacent a seal or junction line.

公开(公告)号：DE69214940T2

公开(公告)日：1997-05-28

申请号：DE69214940

申请日：1992-03-24

Applicant: ROSEMOUNT INC

Inventor： BRODEN DAVID ,  BISCHOFF BRIAN ,  LOUWAGIE BENNETT

IPC: G01L7/08 ,  G01L9/00 ,  G01L9/12 ,  G01L13/00

Abstract: A metal thin film bonds a semiconductor bonding region of a diaphragm layer to a ceramic bonding region of a high modulus support block. The arrangement isolates a pressure sensing diaphragm from undesired strain, improving sensor accuracy. A passageway through the support block couples the fluid pressure to the sensing diaphragm to deflect it. Capacitive coupling between the diaphragm and a capacitor plate on the support block sense the deflection and provide an output representative of pressure.

公开(公告)号：DE69214940D1

公开(公告)日：1996-12-05

申请号：DE69214940

申请日：1992-03-24

Applicant: ROSEMOUNT INC

Inventor： BRODEN DAVID ,  BISCHOFF BRIAN ,  LOUWAGIE BENNETT

IPC: G01L7/08 ,  G01L9/00 ,  G01L9/12 ,  G01L13/00

Abstract: A metal thin film bonds a semiconductor bonding region of a diaphragm layer to a ceramic bonding region of a high modulus support block. The arrangement isolates a pressure sensing diaphragm from undesired strain, improving sensor accuracy. A passageway through the support block couples the fluid pressure to the sensing diaphragm to deflect it. Capacitive coupling between the diaphragm and a capacitor plate on the support block sense the deflection and provide an output representative of pressure.

公开(公告)号：DE69420853T2

公开(公告)日：2000-05-18

申请号：DE69420853

申请日：1994-07-29

Applicant: ROSEMOUNT INC

Inventor： LOUWAGIE BENNETT ,  MUNSON GREGORY ,  WIKLUND DAVID ,  ZWEBER MICHAEL ,  BRODEN DAVID ,  BISCHOFF BRIAN ,  CORPRON GARY

IPC: G01F1/36 ,  G01F1/88 ,  G01F15/06 ,  G01F23/14 ,  G01F23/18 ,  G01L7/08 ,  G01L9/04 ,  G01L19/00 ,  G01L19/08

Abstract: A two-wire transmitter senses a pressure using an internal pressure sensor. The transmitter includes an input for receiving a process variable from a remote sensor which is separated from the transmitter. Circuitry in the transmitters transmits information on a two-wire process control loop which is related to the sensed pressure and the process variable.

公开(公告)号：DE69415662D1

公开(公告)日：1999-02-11

申请号：DE69415662

申请日：1994-04-12

Applicant: ROSEMOUNT INC

Inventor： LOUWAGIE BENNETT ,  LEMIRE STEVEN ,  EVERETT CRAIG

IPC: G01L19/06 ,  G01L7/08 ,  G01L19/00

Abstract: An isolator diaphragm is formed and connected to a support member so it will withstand periodic high pressure cleaning. Such periodic cleaning includes use of heated, concentrated cleaning solutions flowing under high pressure from a nozzle which moves rapidly over segments of an exposed surface of the isolator diaphragm. The present invention prevents isolator diaphragm failure precipitated by the substantially incompressible isolator fluid driven toward the perimeter of the diaphragm during cleaning operations. Such cleaning operations generate a separating force between the isolator diaphragm and diaphragm support. The isolator diaphragm has a peripheral wall portion bonded to a planar support surface and is formed to have an offset center region. The peripheral wall and center region are joined by a conical, inclined wall bounding the center portion. The support member has a correspondingly shaped recess with an inclined annular wall that supports the conical wall of the diaphragm. The primary diaphragm flexure point of the center portion of the diaphragm is moved away from the perimeter of the diaphragm, to adjacent the junction of the inclined wall and the center region. The bonding area is not subjected to a high separating force due to the movement in the incompressible fill fluid to a localized region of the diaphragm adjacent a seal or junction line.