METHOD FOR ANTICIPATORY MAINTENANCE AND/OR METHOD FOR DETERMINING THE ELECTRIC CONDUCTIVITY OF A MAGNETIC-INDUCTIVE FLOW METER

摘要

The invention relates to a method for the anticipatory maintenance on a magnetic-inductive flow meter and/or to a method for determining the electric conductivity of a medium flowing through a magnetic-inductive flow meter, the magnetic-inductive flow meter comprising the following components: a magnet system, which produces a magnetic field permeating the measuring tube and extending substantially transversely to the measuring tube axis, at least two measuring electrodes coupled to the medium, the electrodes having a defined resting potential and being disposed in a region of the measuring tube that is located substantially perpendicular to the magnetic field, and a control/evaluation unit, which supplies information about the volume or mass flow of the medium in the measuring tube based on the measuring voltage induced in the measuring electrodes. For example, a first excitation signal having a first frequency (f ₁)