公开(公告)号：JPH102824A

公开(公告)日：1998-01-06

申请号：JP7090797

申请日：1997-03-10

Applicant: ROSEMOUNT INC

Inventor： KNECHT THOMAS A ,  RUF JAMES ,  SCHULTE JOHN P

IPC: G01L9/04 ,  G01L7/08 ,  G01L9/00 ,  G01L19/00 ,  G01L19/10

Abstract: PROBLEM TO BE SOLVED: To provide a pressure sensor which displays that there is a reference pressure in a sealed chamber on one principal plane of a diaphragm part. SOLUTION: A cap member 82 is fixed for sealing on one principal plane of a diaphragm part 79 to form a sealed chamber between them and presence of reference pressure is easily discriminated by deflecting the cup member 82 to inner direction when the sealed chamber is in reference pressure (vacuum). A diaphragm assembly 77 is fix on a fitting plane through a stress separation layer 71 and whereby transmission of distortion from the fitting plane is reduced and measuring error is reduced.

公开(公告)号：JPH0634020B2

公开(公告)日：1994-05-02

申请号：JP50215782

申请日：1982-05-27

Applicant: ROSEMOUNT INC

Inventor： GURINDOHAIMU AARU EI

IPC: G01D5/14 ,  G01L9/12 ,  G01R27/02 ,  G01D5/24 ,  G01R27/26

公开(公告)号：JPH063912B2

公开(公告)日：1994-01-12

申请号：JP50101285

申请日：1985-02-13

Applicant: ROSEMOUNT INC

Inventor： ORUSON JIIN ETSUCHI ,  KYUI DENISU EI

IPC: G06F13/372 ,  H04J3/06 ,  H04L12/417 ,  H04L12/40

公开(公告)号：JPH0378757B2

公开(公告)日：1991-12-16

申请号：JP50147182

申请日：1982-04-06

Applicant: ROSEMOUNT INC

Inventor： KAAKUPATORITSUKU UIRIAMU AARU

IPC: G01P5/00 ,  G01P5/165 ,  H05B3/14

公开(公告)号：JPH0332027B2

公开(公告)日：1991-05-09

申请号：JP50004879

申请日：1978-10-06

Applicant: ROSEMOUNT INC

Inventor： GURINDOHAIMU AARU EE

IPC: G01L9/12 ,  G01R19/25 ,  G01R27/26 ,  H03M1/00 ,  H03M1/12

公开(公告)号：JPH0219892B2

公开(公告)日：1990-05-07

申请号：JP6234880

申请日：1980-05-13

Applicant: ROSEMOUNT INC

Inventor： JERARUDO AARU KUTSUSHII

IPC: G01L1/10 ,  G01L9/00 ,  G01L13/02

公开(公告)号：JPH01503084A

公开(公告)日：1989-10-19

申请号：JP50384687

申请日：1987-06-12

Applicant: ROSEMOUNT INC

IPC: G01L9/12 ,  G01L20060101 ,  G01L7/08 ,  G01L9/00 ,  G01L13/00 ,  G01L13/02

公开(公告)号：JPS6139200A

公开(公告)日：1986-02-25

申请号：JP21108983

申请日：1983-11-11

Applicant: Rosemount Inc

Inventor： ROJIYAA REONAADO FURITSUKU

IPC: G01D5/26 ,  G01D5/24 ,  G08C19/02

公开(公告)号：JPS60260632A

公开(公告)日：1985-12-23

申请号：JP27355384

申请日：1984-12-26

Applicant: ROSEMOUNT INC

Inventor： RICHIYAADO EI MAAKURU

IPC: C08J9/16 ,  C08J9/00 ,  C08J9/02 ,  C08J9/10

公开(公告)号：JPS6019039B2

公开(公告)日：1985-05-14

申请号：JP539576

申请日：1976-01-20

Applicant: ROSEMOUNT INC

Inventor： ROJAA REONAADO FURITSUKU

IPC: G08C19/02 ,  G01L9/12 ,  G01R27/26 ,  G08C19/10

Abstract: A two wire current transmitter providing a current signal representing a parameter measured by a variable reactance transducer along the same two wires that are used to carry excitation power to the circuit. The reactance is measured by a circuit providing a DC signal which controls a current control stage to modify the total current through the two wires. The current control stage has a small number of components and operates on a relatively low voltage.