Process meter

US7040179B2 · kind B2 · utility

Assignee

• Endress+Hauser Flowtec AG · CH

Inventors

• Wolfgang Drahm · Erding, DE
• Alfred Rieder · Landshut, DE

Key dates

• Filing date: Dec 8, 2003
• Grant date: May 9, 2006
• Expiry date: Jan 28, 2024

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F15/024
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A process meter for measuring at least one physical process variable of a medium stored in a container or flowing in a line, comprising: a transducer including a sensor arrangement providing measurement signals (s1, s2), said sensor arrangement having: at least a first sensor providing at least a first measurement signal (s1) in response to the physical process variable being measured, particularly to changes in the process variable, and at least a first temperature sensor mounted in said transducer for locally sensing a first temperature, T1, in the transducer, and by means of said at least one temperature sensor, at least a first temperature measurement signal (Θ1) representing the first temperature, T1, in said transducer; and meter electronics which, using at least said first measurement signal (s1) and a first correction value (K1) for the at least first measurement signal (s1), derive at least one measured value (X) currently representing the physical variable, wherein: during operation, said meter electronics determine the first correction value (K1) from a temporal variation of the at least first temperature measurement signal (Θ1) by also taking into account temperature va…