Method for operating a Coriolis mass flowmeter

US10337901B2 · kind B2 · utility

Assignee

• KROHNE Messtechnik GmbH · DE

Inventors

• Kourosh Kolahi · Duisburg, DE
• Johannes Kunze · Mülheim, DE
• Ralf Storm · Essen, DE

Key dates

• Filing date: Feb 22, 2017
• Grant date: Jul 2, 2019
• Expiry date: Jun 20, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N9/002
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for operating a Coriolis mass flowmeter that has at least one measuring tube with medium flowing through it involves exciting the measuring tube excited to oscillation, detecting the oscillations of the measuring tube and determining the density of the medium. Detection of the state and a change in the state of a Coriolis mass flowmeter is achieved by determining a calibration temperature and a calibration density sensitivity of the Coriolis mass flowmeter using the detected oscillations, at a temperature differing from the calibration temperature, and a density sensitivity of the flowmeter determined using the detected oscillations. A measurement rate of change of the density sensitivity is determined and a forecast rate of change of the density sensitivity is calculated using a forecast algorithm, and at a given deviation of the measurement rate of change from the forecast rate of change rp, a deviation signal is generated.