MAGNETICALLY INDUCTIVE FLOW METER
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Accused Products
Abstract
A magnetically inductive flow meter including a first electrode arrangement for galvanically contact detection of an induced voltage dependent on the flow velocity of the medium as a first measurement signal, and a second electrode arrangement for capacitive detection of an induced voltage as a second measurement signal, wherein by determining and evaluating characteristic parameters of the first and second measurement signals, diagnostic messages on the status of the medium and/or the flow meter are obtained, such as the content of gas bubbles in the fluid, electrode corrosion, electrical conductivity of the medium, damage to the electrically insulating interior lining of the measuring tube, deposits on electrodes, magnetic interference fields, electrode short-circuits and/or the fill level of the measuring tube.
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Citations
14 Claims
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1-6. -6. (canceled)
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7. A magnetically inductive flow meter, comprising:
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a first measuring section surrounded by a wall and having a medium flowing through said first measuring section; a magnetic field generator; a first electrode arrangement for determining, as a first measuring signal in a galvanically contacting manner, a voltage which is induced via the first measuring section and which is dependent upon a flow rate of the medium flowing through the first measuring section; a controller/evaluator which control the magnetic field generator, determines a measured value for the flow rate and outputs the measured value for the flow rate dependent upon the first measuring signal; and a second electrode arrangement which determines, as a second measuring signal in a capacitive manner, a voltage which is induced via a second measuring section; wherein the controller/evaluator is configured so as to determine in each case a characteristic parameter of the first measuring signal and the second measuring signal and configured to determine and output a diagnostic indication dependent upon at least one of (i) the first parameter and (ii) the second parameter. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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Specification