Patent ID: 7882749
Filing Date: 2011-02-08
Classification: G01F

Abstract:
1. A method for ascertaining the volume- or mass-flow of a medium flowing through a magneto-inductive, flow-measuring device having a predetermined nominal-diameter, comprising the steps of: causing a periodically alternating magnetic field to pass through the flow-measuring device; ascertaining an actual rise time until reaching a constant magnitude of the magnetic field; comparing the actual rise time with a desired rise time ascertained for the case of flow of a reference medium through the flow-measuring device; interpreting a difference between the actual rise time and the desired rise time to mean flow of a magnetically conductive medium; and ascertaining a measurement error based on a difference between actual rise time and desired rise time as a function of the difference, and the actually measured volume- or mass-flow of the magnetically conductive medium is so corrected, that the measurement error is canceled.