Analysis of the causes of errors intelligent electromagnetic flowmeter scale

Abstract: analysis of the causes of errors intelligent electromagnetic flowmeter scale information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Intelligent electromagnetic flowmeter has many advantages, but improper selection, installation and use, will cause the error increases, the value is not stable, even damage of the table body. （ 1) In the liquid to liquid containing solid powder, particles or fibers such as solid, possible reason. More flow meter manufacturers choose model price quote you are welcome to inquire, the following is the analysis of the causes of errors intelligent electromagnetic flowmeter scale article details. Intelligent electromagnetic flowmeter has many advantages, but improper selection, installation and use, will cause the error increases, the value is not stable, even damage of the table body. （ 1) In the liquid to liquid containing solid powder, particles or fibers such as solid, possible fault; 1) slurry noise; (2) electrode surface defiled; (3) insulation sediments or sedimentary cover or lining electrode; (4) the lining by wear or by sediments, narrow flow cross-section. （ 2) Liquid not filled because of a shortage of back pressure or flow sensor installation location, leading to the measuring tube filled with liquid to level of failure phenomenon due to not full and flow conditions have different performance. If a small amount of gas in pipe duct in stratified flow and wave flow, fault phenomenon characterized by error increases, the flow measurement values do not tally with the actual value; If flow is the flow of air bubbles or plug flow, fault phenomenon in addition to the measured values do not tally with the actual value, will be output by gas phase instantaneous covered electrode surface rock; If the gas phase stratified flow in horizontal pipeline flow cross-section part increases, the liquid under the degree of pipe increases, also can appear the output, if the liquid under line situation is serious, so that the electrode surface is below the output will appear super full phenomenon. （ 3) Electrodes and the problems caused by improper grounding ring material selection for material and does not match the measured medium caused failure of the intelligent electromagnetic flowmeter with parts in contact with the medium and grounding electrode ring, matching misconduct in addition to the corrosion problem, as long as it is electrode surface effect. Surface effect should be: (1) chemical reaction ( Membrane surface blunt words, etc. ) ； (2) and electrochemical polarization ( Produce potential) ； (3) catalysis ( Electrode surface generating aerosol, etc. ) 。 Grounding ring also have these effects, but the influence degree. （ 4) Possible liquid crystal, the intelligent electromagnetic flowmeter should be careful with some easy crystallization chemical material in normal under the condition of normal temperature measurement, as a result of the transmission fluid conduit has good thermal insulation, insulation in work when not crystallization, but difficult to implement intelligent electromagnetic flow sensor measurement of tube, thermal insulation, therefore, when the fluid flows through the measuring tube is caused by cooling wall in a layer of solids. Due to switch to other principle of crystallization of the flowmeter measurement also exists, so in the case of no other better way, can choose a kind of measuring tube length is very short & other Ring & throughout; （ oring） Intelligent electromagnetic flow sensor, and the flow meter of upstream pipe thermal insulation shall be strengthened. On the pipeline connection methods, considering flow sensor tear open outfit is convenient, when once the crystallization can easily remove the maintenance. （ 5) Problems caused by liquid conductivity exceed the permitted range liquid conductivity if close to lower limit is also likely to be shaking phenomenon. Because the factory instrument specifications ( 规范) Lower limit value is used in a variety of conditions prescribed by the better condition can be detected in low zui, and the actual conditions can't all very ideal, so he repeatedly encountered low distilled water or deionized water and its conductivity is close to the rules and regulations of electromagnetic flowmeter the lower limit of 5, when using, output the shaking. Is generally thought that can measure the conductivity of the stable under the limit is 1 ~ 2 orders of magnitude higher. Liquid conductivity can refer to the manual, the lack of available data can sample conductivity meter is used to test. But sometimes there are sample to laboratory measurement that available from the pipeline, and the actual electromagnetic flowmeter can't work. This is due to the conductivity measurement of liquid and the liquid in the pipeline has difference, such as liquid has been absorbed CO2 from the atmosphere or NO, generated carbonic acid or nitric acid, the conductivity increased. For liquid containing particles or fiber produces the noise of the slurry, to improve the method of excitation frequency shaking output can be improved efficiently. Some frequency adjustable type IFM3080F 12 electromagnetic flowmeter, measuring concentration of 3. Corrugated board size, 5% at the scene with different excitation frequency measuring instantaneous flow rate, as suggested by the shaking. When the frequency is low, is 50/32 hz, shake up to 10. 7%; Frequency to 50/2 hz, shaking down to 1. 9%, the effect is very obvious. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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