Thread Content
Electromagnetic flowmeters are flow meters characterized by high precision, reliability, and a long service life; therefore, we pay great attention to every detail in the processes of designing the product structure, selecting materials, formulating manufacturing procedures, carrying out production and assembly, as well as conducting final quality checks. We have also developed our own set of advanced production equipment and flow calibration devices specifically for electromagnetic flowmeters, thereby ensuring the long-term quality of these products both in terms of software and hardware. The HD-LDE electromagnetic flowmeter is equipped with a backlit, wide-temperature range Chinese LCD display. It offers comprehensive and practical functions, provides intuitive display, and is easy to operate, thereby reducing the inconvenience associated with the English menus of other electromagnetic flowmeters. Additionally, we have designed a 4-6 multi-electrode structure, which improves measurement accuracy and eliminates the need for a ground ring at any time, thereby reducing the size of the instrument as well as the complexities associated with installation and maintenance. In terms of fluids, liquids containing uniformly distributed small bubbles generally do not cause any issues during normal measurements. However, when the measured volumetric flow rate is the sum of that of the liquid and the gas, the increase in bubble size can cause fluctuations in the output signal. If the bubbles become large enough to cover the entire electrical surface, the electrical signal circuit is momentarily interrupted, resulting in significant fluctuations in the output signal. When two or more liquids are mixed through pipelines, if there are differences in their electrical conductivity (or in their respective potentials with respect to electricity), and flow measurement is carried out using a flow sensor before the mixing is complete, the output signal will also experience fluctuations. Low-frequency (50/16–50/6 Hz) rectangular excitation electromagnetic flowmeters generate slurry noise when measuring liquids containing an excessive amount of solids, and the output signal also experiences certain fluctuations. Improper selection of electrical materials and the medium to be measured can lead to chemical reactions such as passivation or oxidation, the formation of a film on the electrical surface, as well as electrochemical and other phenomena, all of which can hinder proper measurement. Issues related to piping systems and installation are usually caused by incorrect placement of the electromagnetic flowmeter sensors; a common problem is installing the flow sensors at points in the pipeline where gases tend to accumulate ； Back pressure behind the flow sensor; the liquid is discharged directly into the atmosphere, resulting in a non-full condition within its measurement tube ； Installed on vertical pipes running from top to bottom, issues such as emptying may occur. In terms of the environment, the main issues include interference from stray currents in pipelines, spatial electromagnetic wave interference, and magnetic field interference from large motors. Interference caused by stray currents in pipelines can generally be mitigated through proper single-grounding protection to achieve satisfactory measurement results; however, in cases where there are strong stray currents in the pipelines (such as those in electrolysis plants), this approach may not be sufficient, and measures involving electromagnetic flowmeter sensors and the pipeline insulation must be taken. Space electromagnetic wave interference generally enters through signal cables, and single-layer shielding is usually used for protection; however, there have been cases where even such shielding was not sufficient to overcome the interference. For more information, please visit the company’s official website at http://www.yb1518.com/. Please keep this link when reproducing the content! http://www.yb1518.com/UploadFiles/2012717174126829.jpg