Analysis of Application Characteristics of Electromagnetic Flow Meter

Abstract: The application characteristics and analysis information of electromagnetic flowmeters are provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Analysis of the application characteristics of electromagnetic flowmeters Flowmeters are one of the major types of instruments in process automation instruments and devices. In industrial sites, instruments that measure fluid flow are collectively referred to as flowmeters or flowmeters, which are one of the most important instruments in industrial measurement. . With the work. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the application characteristics analysis article of electromagnetic flowmeters. Analysis of the application characteristics of electromagnetic flowmeters Flowmeters are one of the major types of instruments in process automation instruments and devices. In industrial sites, instruments that measure fluid flow are collectively referred to as flowmeters or flowmeters, which are one of the most important instruments in industrial measurement. . With the development of the industry, the requirements for the accuracy and range of flow measurement are getting higher and higher. In order to adapt to a variety of purposes, various types of flow meters have come out one after another, which are widely used in oil and gas, petrochemical, water treatment, food and beverage, Pharmaceutical, energy, metallurgy, pulp and paper and building materials industries. In process automation instruments and devices, flow meters have two major functions: as a detection instrument for process automation control systems and a total meter for measuring the quantity of materials. Electromagnetic flowmeter is widely used in sewage, fluorine chemical, production water, tap water industry, medicine, steel and many other aspects. Due to the principle, it can only measure conductive liquids, although it is more reliable and stable than other types. The flowmeter is much better, but any product always has its shortcomings. The author analyzes the advantages and disadvantages of the electromagnetic flowmeter as follows: Advantages: 1. The electromagnetic flowmeter can be used to measure industrial conductive liquids or slurries. 2. No pressure loss. 3. The measurement range is large, and the diameter of the electromagnetic flow transmitter is from 2.5mm to 2.6m. 4. The electromagnetic flowmeter measures the volume flow of the fluid to be measured under the working state, and the measurement principle does not involve the influence of the temperature, pressure, density and viscosity of the fluid. Disadvantages: 1. The application of electromagnetic flowmeter has certain limitations. It can only measure the liquid flow of conductive media, and cannot measure the flow of non-conductive media, such as heating water with better gas and water treatment. In addition, its lining needs to be considered under high temperature conditions. 2. The electromagnetic flowmeter determines the volume flow in the working state by measuring the speed of the conductive liquid. According to the measurement requirements, for the liquid medium, the mass flow should be measured, and the measured medium flow should involve the density of the fluid. Different fluid media have different densities and change with temperature. If the electromagnetic flowmeter converter does not consider the fluid density, it is not suitable to only give the volume flow at normal temperature. 3. The installation and debugging of electromagnetic flowmeters are more complicated and stricter than other flowmeters. The transmitter and the converter must be used together, and two different types of instruments cannot be used between them. When installing the transmitter, from the selection of the installation site to the specific installation and debugging, it must be carried out in strict accordance with the requirements of the product manual. There should be no vibration or strong magnetic field at the installation site. The transmitter and the pipeline must have good contact and good grounding during installation. The potential of the transmitter is equal to that of the fluid being measured. During use, the gas remaining in the measuring tube must be exhausted, otherwise it will cause a large measurement error. 4. When the electromagnetic flowmeter is used to measure the viscous liquid with dirt, the viscous matter or sediment adheres to the inner wall of the measuring tube or the electrode, so that the output potential of the transmitter changes, which brings measurement error, and the dirt on the electrode reaches a certain thickness , which may cause the meter to fail to measure. 5. The scaling or wear of the water supply pipeline changes the inner diameter, which will affect the original flow value and cause measurement errors. For example, a 1mm change in the inner diameter of a 100mm instrument will bring about 2% additional error. 6. The measurement signal of the transmitter is a small millivolt level potential signal. In addition to the flow signal, there are also some signals unrelated to the flow, such as phase voltage, quadrature voltage and common mode voltage. In order to measure the flow accurately, it is necessary to eliminate various interference signals and effectively amplify the flow signal. The performance of the flow converter should be improved. It is best to use a microprocessor-based converter to control the excitation voltage. Select the excitation mode and frequency according to the properties of the fluid to be measured, which can eliminate in-phase interference and quadrature interference. However, the improved instrument has a complex structure and high cost. During the use of the electromagnetic flowmeter, regular visual inspections should be carried out to check the surrounding environment of the instrument, remove dust, ensure that water and other substances do not enter, check whether the wiring is in good condition, and check whether there is a new strong electromagnetic field device near the instrument or a new wire across the instrument. . If the measuring medium is easy to contaminate the electrode or deposit or scale in the measuring tube wall, it should be cleaned and cleaned regularly. (Zhongke Instrument) For more product information, please check the above is the whole content of this article,You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Analysis of Application Characteristics of Electromagnetic Flow Meters'
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