Patent ID: 8587326
Filing Date: 2013-11-19
Classification: G01F

Abstract:
1. A method for operating a magneto-inductive flow measuring device having a measuring tube, comprising the steps of: providing an at least partially electrically-conductive measured material to flow through the measuring tube; producing by means of at least one coil arrangement a clocked magnetic field for determining flow, which passes at least partially through the measured material, and wherein the magnetic field is produced by an exciter current, which flows through the coil arrangement; operating the magnetic field with at least a first clocking, wherein in a case, in which the coil arrangement is free of exciter current, an electrical potential difference is sensed between the measured material and a reference potential by means of at least a first measuring electrode communicating with the measured material; comparing the potential difference with a predetermined reference value; and operating the magnetic field, in the case of a deviation of the potential difference from the reference value lying within a predetermined threshold value, for determining flow, with at least a second clocking, reduced compared to the first clocking, wherein: the reference value is determined from a value, especially a furnished value, of the potential difference between the first measuring electrode and the reference potential.