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Aline Maalouf
A Validated Model for the Electromagnetic Flowmeter´s Measuring Cell
Keywords: electrode/electrolyte interface, measurement cell, impedance spectrometry, impedance spectroscopy
This paper proposes as well a measurement model for the electromagnetic flowmeter’s measuring cell that constitutes an off-line measurement model for the electromagnetic flowmeter with which it is possible to try different signal processing algorithms to estimate the flowrate value. This model was validated using impedance spectroscopy and spectrometry. Knowing the value of the electrode/electrolyte impedance it is possible as well to determine the value of the input impedance of the preamplifier that reduces the error caused by the impedance of the electrode/electrolyte interface. The value of this latter is used on the other hand to determine the value of the lower frequency limit above which the reading of the induced voltage level of the electromagnetic flowmeter can be carried out with a satisfactory signal-to-noise ratio.
tm – Technisches Messen, Oldenbourg Wissenschaftsverlag
Print ISSN: 0171-8096
Volume: 73, 06/2006
Pages: 350 - 363