Method for operating a Coriolis mass flowmeter and corresponding Coriolis mass flowmeter

US11828638B2 · kind B2 · utility

Inventors

• Ralf Storm · Essen, DE
• Johannes Kunze · Mülheim, DE
• Volker Stegemann · Bochum, DE
• Alexander Erkelenz · Moers, DE

Key dates

• Filing date: Apr 27, 2022
• Grant date: Nov 28, 2023
• Expiry date: Apr 29, 2042

Classification

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

Abstract

A method for operating a Coriolis mass flowmeter includes: calculating error-free oscillation signal phase differences using a first measuring channel pair with a first measuring channel phase difference; calculating averaged error-containing oscillation signal phase differences using a second measuring channel pair with a second measuring channel phase difference; determining error-containing oscillation signal phase differences using a third measuring channel pair with negligible measuring channel phase difference; determining the second measuring channel phase difference by difference formation from the averaged error-containing oscillation signal phase differences of the second measuring channel pair and the error-free oscillation signal phase differences of the first measuring channel pair; obtaining error-free oscillation signal phase differences by subtracting the determined second measuring channel phase difference from the error-containing oscillation signal phase differences of the third measuring channel pair; and using the error-free oscillation signal phase differences for determining the mass flow rate.