Redundant mechanical and electronic remote seal system

G - Physics – 01 – L

Patent

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Details

G01L 19/06 (2006.01) G01L 7/08 (2006.01) G01L 13/00 (2006.01) G01L 27/00 (2006.01)

Patent

CA 2752789

A redundant pressure transmitter for redundantly measuring pressure of a process fluid comprises a transmitter housing, transmitter circuitry, a remote seal assembly including a first pressure sensor, and a second pressure sensor positioned in the transmitter housing. The remote seal assembly also comprises a remote seal flange, a communication system and a capillary tube. The remote seal flange communicates with the process fluid and the first pressure sensor senses the process fluid pressure at the remote seal flange. The communication system relays output of the first pressure sensor to the transmitter circuitry, and the capillary tube communicates the process fluid pressure to the transmitter housing via a fill fluid, where the second pressure sensor senses the pressure of the process fluid through the fill fluid.

L'invention concerne un transmetteur de pression redondant pour mesurer la pression d'un fluide de procédé de manière redondante, qui comprend un boîtier de transmetteur, un circuit de transmetteur, un assemblage de garniture d'étanchéité distante doté d'un premier capteur de pression et d'un deuxième capteurs de pression placés dans le boîtier de transmetteur. L'assemblage de garniture d'étanchéité distante comprend également une bride de garniture d'étanchéité distante, un système de communication et un tube capillaire. La bride de garniture d'étanchéité distante communique avec le fluide de procédé et le premier capteur de pression détecte la pression du fluide de procédé au niveau de la bride de garniture d'étanchéité distante. Le système de communication transmet le résultat du premier capteur de pression au circuit du transmetteur, et le tube capillaire communique la pression du fluide de procédé au boîtier du transmetteur via un fluide de remplissage, et le deuxième capteur de pression détecte la pression du fluide de procédé à travers le fluide de remplissage.

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