Intelligent electromagnetic flowmeters Fluids Fluids with uniformly distributed fine air bubbles usually do not affect normal measurements, but when the measured volumetric flow is the sum of both liquid and gas, the output signal fluctuates due to the increase in air bubbles, if the air bubbles are large enough to flow through the electrodes. Covering the entire surface of the electrode, the electrode signal loop is instantaneously disconnected, and the output signal will produce greater fluctuations. Two or more liquids for mixing duct work <br> <br> intelligent electromagnetic flowmeter fluidically
Liquids containing uniformly distributed fine air bubbles usually do not affect the normal measurement, but when the measured volumetric flow is the sum of both liquid and gas, the output signal fluctuates due to the increase of air bubbles, if the air bubbles are large enough to flow over the electrode to cover the entire electrode surface, so that The momentary disconnection of the electrode signal loop causes greater fluctuations in the output signal.
When two or more liquids are used as the pipeline mixing process, if the conductivity of the two liquids (or their respective electrode chapter potentials) is different, the flow sensor will enter the flow measurement before the mixing is not uniform, and the output signal will also fluctuate.
Low-frequency (50/16~50/6Hz) rectangular excitation electromagnetic flowmeters measuring liquids containing solids above a certain level will produce slurry noise, and the output signal will also fluctuate to some extent.
Intelligent electromagnetic flowmeter electrode material and measured media misfit, resulting in passivation or oxidation and other chemical effects, the surface of the electrode to form an insulating film, as well as electrochemical and polarization phenomena, will impede the normal measurement.
Pipe system and installation
Usually the electromagnetic flowmeter sensor installation position is not correct failure caused by the flowmeter sensor is often installed in the accumulation of high retention gas pipe network high point; flow sensor back pressure, liquid discharged directly into the atmosphere, forming its measurement tube is not full Tube; mounted on vertical pipes from top to bottom, may cause emptying and other reasons.
Intelligent electromagnetic flowmeter environment is mainly the pipe stray current interference, space electromagnetic interference, large-field magnetic interference. The stray current interference of the pipeline is usually obtained by taking good individual grounding protection to obtain a satisfactory measurement, but if there is a strong stray current in the pipeline (such as a pipeline in the electrolysis workshop), it may not be overcome, and the measure of insulation between the flow sensor and the pipeline must be adopted. Space electromagnetic interference is usually introduced via signal cables. Usually single-layer shielding is used for protection. However, shielding protection has not yet been overcome.
Liquids containing uniformly distributed fine air bubbles usually do not affect the normal measurement, but when the measured volumetric flow is the sum of both liquid and gas, the output signal fluctuates due to the increase of air bubbles, if the air bubbles are large enough to flow over the electrode to cover the entire electrode surface, so that The momentary disconnection of the electrode signal loop causes greater fluctuations in the output signal.
When two or more liquids are used as the pipeline mixing process, if the conductivity of the two liquids (or their respective electrode chapter potentials) is different, the flow sensor will enter the flow measurement before the mixing is not uniform, and the output signal will also fluctuate.
Low-frequency (50/16~50/6Hz) rectangular excitation electromagnetic flowmeters measuring liquids containing solids above a certain level will produce slurry noise, and the output signal will also fluctuate to some extent.
Intelligent electromagnetic flowmeter electrode material and measured media misfit, resulting in passivation or oxidation and other chemical effects, the surface of the electrode to form an insulating film, as well as electrochemical and polarization phenomena, will impede the normal measurement.
Pipe system and installation
Usually the electromagnetic flowmeter sensor installation position is not correct failure caused by the flowmeter sensor is often installed in the accumulation of high retention gas pipe network high point; flow sensor back pressure, liquid discharged directly into the atmosphere, forming its measurement tube is not full Tube; mounted on vertical pipes from top to bottom, may cause emptying and other reasons.
Intelligent electromagnetic flowmeter environment is mainly the pipe stray current interference, space electromagnetic interference, large-field magnetic interference. The stray current interference of the pipeline is usually obtained by taking good individual grounding protection to obtain a satisfactory measurement, but if there is a strong stray current in the pipeline (such as a pipeline in the electrolysis workshop), it may not be overcome, and the measure of insulation between the flow sensor and the pipeline must be adopted. Space electromagnetic interference is usually introduced via signal cables. Usually single-layer shielding is used for protection. However, shielding protection has not yet been overcome.
Applicable area 53~92m²
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