Patent ID: 7340963
Filing Date: 2008-03-11
Classification: G01F

Abstract:
1. A method for magneto-inductive determination of flow rate of a medium flowing through a measuring tube in the direction of the measuring tube axis, wherein a magnetic field passes through the measuring tube essentially perpendicularly to the measuring tube axis, a measurement voltage is induced in at least one measuring electrode arranged essentially perpendicularly to the axis of the measuring tube, and the induced measurement voltage delivers information concerning the volume flow of the medium in the measuring tube, the method comprising the steps of: issuing a test pulse (U determining at least one signal in response to the test pulse (U selecting the measuring points in time (t determining the relaxation time (T), or the length of time until reaching of a predetermined state of discharge (U detecting a malfunctioning of the measuring electrode on the basis of the determined relaxation time, or on the basis of the length of time until the reaching of the defined state of discharge (U