Pressure transmitter with multiple reference pressure sensors

G - Physics – 01 – L

Patent

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Details

G01L 19/00 (2006.01) G01L 27/00 (2006.01)

Patent

CA 2656738

Reliability and accuracy in a pressure measurement transmitter are provided by employing a plurality of absolute or gauge pressure sensors (220, 222, 230, 232; 307, 301) operating in conjunction with a differential pressure sensor. A method (400) is also provided to perform diagnostics based upon the readings of the three pressure sensors. Further, should one of the three pressure sensors (218, 220, 222, 230, 232; 301, 307, 334) fail, a reasonable estimate of process pressure beijig measured by the failed sensor can be generated based upon the remaining two sensors.

La fiabilité et la précision dans un transducteur de mesure de pression sont obtenues en employant une pluralité de capteurs de pression absolue ou effective (220, 222, 230, 232 ; 307, 301) fonctionnant en association avec un capteur de pression différentielle. Un procédé (400) est également fourni pour effectuer des diagnostics en se basant sur les résultats des trois capteurs de pression. En outre, si l'un des trois capteurs de pression (218, 220, 222, 230, 232 ; 301, 307, 334) venait à faillir, une estimation raisonnable de la pression du procédé en cours de mesure par le capteur défectueux peut être générée en se basant sur les deux capteurs restants.

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