Electromagnetic flowmeter calibration verification
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United States of America Patent
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Jul 17, 2018
Grant Date -
Aug 17, 2017
app pub date -
Feb 17, 2016
filing date -
Feb 17, 2016
priority date (Note) -
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Abstract
A magnetic flowmeter has a conduit, an electrical coil, and a coil driver configured to energize the electrical coil with a periodic electrical signal and generate a magnetic field in the conduit that periodically reverses polarity. Electrodes are arranged to detect a voltage generated by flow of the conductive fluid through the conduit and through the magnetic field. A measurement system receives electrical signals from the electrodes and determines a flow rate of the conductive fluid using the electrical signals. The flowmeter has a meter verification system that includes a sensor configured to detect the magnetic field generated by electrical coil when it is energized by the coil driver. The meter verification system is configured to determine an amplitude of the periodically changing magnetic field and to use this amplitude to assess the current operational effectiveness of the magnetic flowmeter.
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