Compensation method and apparatus for a coriolis flow meter

G - Physics – 01 – F

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G01F 1/84 (2006.01) G01F 25/00 (2006.01)

Patent

CA 2586575

Method and apparatus (121) for providing temperature flow rate compensation for a Coriolis flow meter. The described compensation compensates both flow calibration factor and the nominal time delay, commonly called "zero" in the art. After a Coriolis flow meter is installed into a process, whether for calibration or for actual process use, it need only be zeroed once over its lifetime following its installation. This is a significant improvement over prior Coriolis flow meters that may need to be re-zeroed after minor changes in pressure, temperature, or installation.

L'invention concerne un procédé et un dispositif (121) de compensation thermique de débit pour un débitmètre à effet Coriolis. Cette compensation corrige à la fois le facteur de calibrage de débit et le retard nominal, généralement appelé "zéro" dans la technique. Après installation du débitmètre à effet Coriolis dans un processus, à des fins de calibrage ou d'utilisation dans le processus réel, celui-ci ne doit être remis à zéro qu'une seule fois tout au long de sa durée de vie. Ceci constitue une amélioration importante par rapport aux débitmètres à effet Coriolis antérieurs qui nécessitent une remise à zéro après chaque modification mineure de pression, température, ou installation.

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