Krohne Messtechnik Gmbh

Nicolaus Mathies

Helmut Brockhaus

Johannes Kunze

Jan Förster

A method for operating a magnetic-inductive flowmeter includes: passing a magnetic field through a measuring tube having a medium flowing therethrough; tapping a voltage induced in the medium as a measuring signal; determining a flow measurement value from the measuring signal; generating measuring signal samples in respective measuring windows that periodically repeat at a measuring window frequency; determining an averaged flow measurement value from the measuring signal samples; obtaining an amplitude spectrum of the measuring signal samples by a frequency analysis thereof; determining an interference peak in the amplitude spectrum and an associated interference peak frequency that is not a multiple of the measuring window frequency; identifying a critical measurement situation by checking whether the interference peak frequency falls below a critical frequency distance to a multiple of the measuring window frequency; and in the presence of a critical measurement situation, determining and setting a new measuring window frequency.

Method for operating a magnetic-inductive flowmeter and a corresponding magnetic-inductive flowmeter

A method for configuring a field device for use in custody transfer and such a field device, wherein the field device has a computing unit and a storage, wherein parameters and/or functions are stored in the storage, and wherein the parameters and/or functions are at least partially configurable. A more flexible configuration of the field device used for custody transfer is achieved by at least two blocking groups being provided, wherein each blocking group comprises at least one parameter and/or at least one function of the field device, at least one blocking group is chosen and evaluated by the computing unit, and the computing unit blocking the parameters and/or functions contained in the chosen at least one blocking group against a subsequent change.

Growing community of inventors

Moers, Germany

Nicolaus Mathies