| 摘要 |
A magneto-inductive flow measuring device, including: A measuring tube, through which a medium flows essentially in a direction of a measuring tube axis; a magnet arrangement, which produces a magnetic field passing through the measuring tube and extending essentially perpendicularly to the measuring tube axis; a first measuring electrode and a second measuring electrode; wherein the measuring electrodes are positioned in the measuring tube on a connecting line, which is directed essentially perpendicularly to the measuring tube axis and to the magnetic field; and an evaluation/control unit, which ascertains, on the basis of a measurement voltage tapped on the measuring electrodes, the volume- and/or mass-flow of the medium through the measuring tube. In order to increase the measuring accuracy of the multi-parameter flow measuring device, the first measuring electrode is made of a first material and the second measuring electrode is made of a second material different from the first material. The control/evaluation unit ascertains the direct voltage portion of the voltages tapped on the two measuring electrodes relative to a reference potential (phiR), and makes available, on the basis of the direct voltage portion (UD), medium-specific information.
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