Method for operating a magnetic-inductive flowmeter and magnetic-inductive flowmeter
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United States of America Patent
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Apr 14, 2020
Grant Date -
Feb 22, 2018
app pub date -
Aug 18, 2017
filing date -
Aug 21, 2016
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Abstract
A method for operating a magnetic-inductive flowmeter that has at least one measuring unit for measuring the flow of a medium through a pipeline, a housing and at least one control and evaluation unit, wherein the measuring unit has at least one coil for generating a magnetic field, and wherein at least one capacitance formed in conjunction with the coil forms a resonant circuit and wherein the resonant circuit has at least one measured variable characterizing it. A particularly reliable operation of the flowmeter is achieved in that the resonant circuit is excited with an excitation frequency, that the measured variable characterizing the resonant circuit is determined, that a comparison value of the measured variable characterizing the resonant circuit for the leak-free case is stored in the control and evaluation unit and that the measured variable characterizing the resonant circuit is compared to the comparison value.
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