| 摘要 |
The invention relates to a method and to a device (1) for system and process supervision in a magneto-inductive sensor. A medium (6) flows through a measuring tube (2) substantially in the direction of the axis (5) of the measuring tube. A magnetic field extends through the measuring tube (2) in a direction substantially perpendicular to the axis (5) of the measuring tube. A measuring voltage is induced in at least one measuring electrode (3; 4) that is disposed substantially perpendicular to the axis (5) of the measuring tube. Said measuring voltage or the measurement data provide information on the volume flow of the measuring medium (6) in the measuring tube (2). The aim of the invention is to provide a method and a device which allow, in addition to the determination of the volume flow, the detection of the modification of a system and/or process parameter. To this end, the measurement data are acquired and stored over a predetermined period and the actual measurement data are compared with predetermined desired measurement data. If there is a deviation between the actual measurement data and the desired measurement data, a message is output.
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