Magnetic flowmeter with fault detection
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United States of America Patent
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-
Dec 6, 1994
Grant Date -
N/A
app pub date -
Jun 30, 1992
filing date -
Jul 4, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A circuit for detecting faults in a magmeter system in which an electrically conductive fluid flows which is maintained at a reference potential. The circuit includes at least two electrodes in contact with the fluid. The electrode signals are conducted to the corresponding inputs of a measuring circuit. An alarm circuit is connected ahead of the measuring circuit. A difference in the magnitude of the values (+U.sub.S and -U.sub.S) of the electrode signals and/or non-symmetries in the noise content of the electrode signals and/or a disturbance in the high frequency signal (U.sub.G) in a loop which contains the electrodes and a high frequency producing generator causes an alarm to be activated.
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