G - Physics – 01 – F
Patent
G - Physics
01
F
73/132, 73/69
G01F 1/58 (2006.01)
Patent
CA 1195140
ELECTROMAGNETIC FLOWMETER Abstract of the Disclosure An electromagnetic flowmeter for measuring the flow of an electrically conductive fluid through a flow system comprises a flow tube adapted to be connected in the flow system for allowing the fluid to flow therethrough. Coils supported by the flow tube are energized to provide magnetomotive force to produce a magnetic field, a portion of which interacts with the fluid to produce an electric field within the fluid. Electrodes supported by the flow tube receive signals from the electric field representative of flow. The electrodes are coupled to a signal processing circuit which processes the signals and transmits an output signal representative of flow to suitable readout equipment. At least one magnetomotive force adjusting means ,such as a plurality of coil taps or connections that permit changing the number of energized turns in the coils allow selection of a desired magnitude of magnetomotive force to set the magnitude of the magnetic field such that signal variations resulting from manufacturing tolerances of the flow tube coils and electrodes are substantially compensated for and the signals received by the electrodes are compatible with a calibration range of the signal processing circuit
429812
Bengtson Darroll D.
Bohn David C.
Murray Jean P.
Marks & Clerk
Rosemount Inc.
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