MAGNETIC-INDUCTIVE FLOW METER AND METHOD FOR OPERATING A MAGNETIC-INDUCTIVE FLOW METER

摘要

A magnetic-inductive flow meter with at least one measuring tube for through flow of an electrically conductive medium, with a magnetic field generating apparatus for generating an alternating magnetic field which runs at least also perpendicular to the longitudinal axis of the measuring tube, with at least two measuring electrodes which especially contact the medium and with an evaluation circuit, the magnetic field generating apparatus having at least one field coil and one coil power supply. Because the measuring electrode circuit, therefore the electrical circuit to which the measuring electrodes belong is monitored by a crosstalk voltage indicator of the evaluation circuit which is active in an operating state when an electrically conductive medium is not flowing through the measuring tube, whether the measuring electrode circuit is serviceable can be derived from the crosstalk voltage.

主权项

1. A magnetic-inductive flow meter, comprising:
at least one measuring tube for through flow of an electrically conductive medium, a magnetic field generating apparatus for generating an alternating magnetic field which runs at least perpendicular to the longitudinal axis of the measuring tube, the magnetic field generating apparatus having at least one field coil and a coil power supply, at least two measuring electrodes which contact the medium, and an evaluation circuit, wherein the evaluation circuit has a crosstalk voltage indicator which is active in a “no through flow” operating state.