Electromagnetic flow meter, miswiring detection apparatus and miswiring detection method
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United States of America Patent
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Aug 2, 2016
Grant Date -
Aug 27, 2015
app pub date -
Feb 24, 2015
filing date -
Feb 25, 2014
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Abstract
An electromagnetic flow meter includes a converter including an excitation unit configured to generate and output an excitation signal and a flow rate signal receiving unit configured receive a flow rate signal, a flowtube including a coil connected to the excitation unit through an excitation cable and an electrode connected to the flow rate signal receiving unit through a signal cable, and a miswiring detection unit configured to enable the excitation unit to output an excitation signal of a first frequency and to calculate a first index value relating to the first frequency and a second index value relating to a second frequency from a flow rate signal acquired when the excitation signal of the first frequency is output. The miswiring detection unit determines that a miswiring occurs when the first index value is not large enough to satisfy a predetermined criterion than the second index value.
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