Magnetic-inductive flowmeter having a conductivity measuring device and method for operating a magnetic-inductive flowmeter having a conductivity measuring device
US11237032B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2020 |
| Grant date | Feb 1, 2022 |
| Priority date | — |
| Expiry date | Aug 27, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/60
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic-inductive flowmeter having a measuring tube for guiding a conductive medium, having a magnetic field generator for generating a magnetic field passing through the measuring tube at least partially perpendicular to the medium flow direction, electrodes for tapping a measuring voltage induced in the medium and a conductivity measuring device for determining the conductivity of the medium. The conductivity measuring device has a measuring circuit with the electrodes, a voltage source and a measuring unit. In operation, the voltage source generates a voltage and the measuring unit measures the actual electrode voltage applied between the electrodes. The control unit sets the actual electrode voltage to a predetermined constant setpoint value and the evaluation unit determines the electrode current flowing between the electrodes and calculates the conductivity value of the medium or a variable related to the conductivity using the determined electrode current and the actual electrode voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.