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MAGNETIC-INDUCTIVE FLOW MEASURING DEVICE WITH CONDUCTIVITY MEASURING DEVICE AND METHOD FOR OPERATING A MAGNETIC-INDUCTIVE FLOW MEASURING DEVICE WITH CONDUCTIVITY MEASURING DEVICE
MAGNETIC-INDUCTIVE FLOW MEASURING DEVICE WITH CONDUCTIVITY MEASURING DEVICE AND METHOD FOR OPERATING A MAGNETIC-INDUCTIVE FLOW MEASURING DEVICE WITH CONDUCTIVITY MEASURING DEVICE
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机译:磁感应流量测量装置电导率测量装置和方法操作磁感应流测量设备与电导率测量装置
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摘要
A magnetic-inductive flowmeter having a measuring tube for guiding a conductive medium, having a magnetic field generator for generating a magnetic field passing through the measuring tube at least partially perpendicular to the medium flow direction, electrodes for tapping a measuring voltage induced in the medium and a conductivity measuring device for determining the conductivity of the medium. The conductivity measuring device has a measuring circuit with the electrodes, a voltage source and a measuring unit. In operation, the voltage source generates a voltage and the measuring unit measures the actual electrode voltage applied between the electrodes. The control unit sets the actual electrode voltage to a predetermined constant setpoint value and the evaluation unit determines the electrode current flowing between the electrodes and calculates the conductivity value of the medium or a variable related to the conductivity using the determined electrode current and the actual electrode voltage.
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