Method for operating a coriolis mass flowmeter and respective coriolis mass flowmeter

US10295388B2 · kind B2 · utility

Assignee

• KROHNE Messtechnik GmbH · DE

Inventors

• Alexander Erkelenz · Moers, DE
• Ralf Storm · Essen, DE

Key dates

• Filing date: Jul 14, 2016
• Grant date: May 21, 2019
• Expiry date: Apr 14, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F25/10
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Described and shown is a method for operating a Coriolis mass flowmeter (1) having at least one measuring tube (2), an oscillation exciting device (3) for exciting the measuring tube (2) to an oscillation (4), at least a first oscillation sensor (5) and a second oscillation sensor (6) and at least a first sensor signal path and a second sensor signal path. The object of the invention is to provide a method in which the measuring accuracy is increased compared to the prior art. The object is achieved in that at least one first test signal is generated having at least one first test signal frequency, that the at least first test signal is fed at least into the first sensor signal path and into the second sensor signal path, that the at least first test signal is guided by the first sensor signal path over the first oscillation sensor (5) and by the second sensor signal path over the second oscillation sensor (6), that a test signal propagation time difference of at least the first test signal is determined at least between the first sensor signal path and the second sensor signal path, and that a sensor signal propagation time difference between a first sensor signal and a second sen…