公开(公告)号：AU4742197A

公开(公告)日：1998-04-24

申请号：AU4742197

申请日：1997-10-01

Applicant: ROSEMOUNT INC

Inventor： PALAN DONALD F ,  GAILLOUX MARK J

IPC: G01F23/284 ,  H01P1/08

Abstract: A waveguide for microwave radar level gages that includes a process sealed barrier in the waveguide that is impedance matched with bore transition sections of the waveguide at opposite ends thereof. The impedance matching results in positioning of the tapered end of the barrier offset from the ends of the bore transition sections.

公开(公告)号：CA2196749A1

公开(公告)日：1996-04-11

申请号：CA2196749

申请日：1995-09-11

Applicant: ROSEMOUNT INC

Inventor： MCCOY STEVEN J ,  SCHUMACHER MARK S ,  KIELB JOHN A ,  PALAN DONALD F ,  EDWARDS GRANT B ,  LONGSDORF RANDY J ,  TEMPLIN JAMES E

IPC: G01D3/08 ,  G01F23/284 ,  H02H9/00 ,  G01D11/24 ,  G08C19/00 ,  G08C19/16

Abstract: A barrier device (2) threadably mounts to a cabling aperture (24) on a field mounted transmitter (6). The field mounted transmitter (6) receives and transmits signals, and is wholly powered by a current loop circuit (14). The barrier device (2) has a conductive housing with at least a first (72) and a second (74) aperture and a pair of conductors (14) passing through the first aperture (72) of the barrier device (2), for connecting to a terminal block (4) in the transmitter (6). A pair of signal terminals (16, 18) are mounted in the second aperture (74) of the barrier device (6). The signal terminals (16, 18) are connectable to a handheld communicator, which is used to calibrate, monitor and test the transmitter (6). A barrier circuit (22) is mounted in the housing and is electrically connected between the signal terminals (16, 18) and the conductors (14).

公开(公告)号：WO9610730A3

公开(公告)日：1996-05-30

申请号：PCT/US9511532

申请日：1995-09-11

Applicant: ROSEMOUNT INC

Inventor： MCCOY STEVEN J ,  SCHUMACHER MARK S ,  KIELB JOHN A ,  PALAN DONALD F ,  EDWARDS GRANT B ,  LONGSDORF RANDY J ,  TEMPLIN JAMES E

IPC: G01D3/08 ,  G01F23/284 ,  H02H9/00

CPC classification number: H02H9/008 ,  G01D3/08 ,  G01F23/284

Abstract: A barrier device (2) threadably mounts to a cabling aperture (24) on a field mounted transmitter (6). The field mounted transmitter (6) receives and transmits signals, and is wholly powered by a current loop circuit (14). The barrier device (2) has a conductive housing with at least a first (72) and a second (74) aperture and a pair of conductors (14) passing through the first aperture (72) of the barrier device (2), for connecting to a terminal block (4) in the transmitter (6). A pair of signal terminals (16, 18) are mounted in the second aperture (74) of the barrier device (6). The signal terminals (16, 18) are connectable to a handheld communicator, which is used to calibrate, monitor and test the transmitter (6). A barrier circuit (22) is mounted in the housing and is electrically connected between the signal terminals (16, 18) and the conductors (14).