Patent ID: 6708569
Filing Date: 2004-03-23
Classification: G01F

Abstract:
A method of operating an electromagnetic flowmeter having a flow tube connected into a fluid-conveying line, said method comprising the steps of:causing the fluid to flow through the flow tube; causing a, particularly bipolar, excitation current generated by means of a measuring and control circuit of the flowmeter to flow through a coil assembly mounted on the flow tube for producing a magnetic field cutting across the fluid; inducing a voltage in the moving fluid for changing potentials applied at measuring electrodes positioned at the flow tube; removing potentials applied to the measuring electrodes for producing a measurement signal derived from the voltage induced in the moving fluid; and applying at least intermittently a discharge voltage generated by a measuring and control circuit to at least one of the measuring electrodes during the flow of the excitation current through the coil assembly.