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A few days ago, a client asked what to do if an electromagnetic flowmeter experiences large fluctuations What causes its large fluctuations? How can large fluctuations in electromagnetic flowmeters be addressed? I believe many of you are not very familiar with this issue. So today, Jiangsu Evergrande Instruments will explain it to you, in the hope of helping everyone! When using electromagnetic flowmeters, we encounter fluctuations in the readings displayed on the gauge; sometimes negative values appear, and at other times the readings jump to positive values. In fact, the direct cause of large fluctuations in electromagnetic flowmeters is the instability of the instantaneous flow rate within the meter. This situation can be caused by various factors, and at the site, the cause of this flow rate instability can be identified using the method of elimination one by one. The direct cause of large fluctuations in electromagnetic flowmeters is the instability of the instantaneous flow rate within the meter. Electromagnetic flowmeters are precise instruments; they can accurately detect and display even the slightest changes in flow rate. There are various reasons for unstable instantaneous flow rates. For example, the straight sections before and after the electromagnetic flowmeter do not meet the requirements, the medium is not clean or no filter is installed on the flowmeter, the medium itself is turbulent or the pressure is unstable, the actual flow rate in the pipeline exceeds the range that the flowmeter can measure, or there are quality issues with the flowmeter itself. I. Reasons for large fluctuations in electromagnetic flowmeters 1. Incorrect installation location, insufficient fill in the pipe, gas remaining in the piping system, or absorption of bubbles. 2. The regular pulsating flow generated in the piping system by reciprocating pumps and similar devices. 3. The liquid contains gas or bubbles. 4. There are strong magnetic fields such as those from motors in the vicinity, and stray currents exist on the pipes. 5. The electrodes of the electromagnetic flowmeter are contaminated, or the electrodes suitable for the liquid being measured were not selected correctly. 6. The grounding electrode of the electromagnetic flowmeter is not installed properly or is affected by magnetic fields. II. Solutions to large fluctuations in electromagnetic flowmeters Determine whether the issue is caused by process operations, with pulsations actually occurring in the fluid; in such cases, the flowmeter simply reflects the actual flow conditions, and the problem will resolve itself once the pulsations cease. Electromagnetic interference caused by external stray currents and the like. Check whether there are any large electrical appliances or welding machines in operation in the environment where the instrument is located; ensure that the instrument is properly grounded and that its operating environment is suitable. When the pipeline is not filled with liquid or contains bubbles, both situations are caused by process-related factors. At this point, it is possible to ask the process technician to verify that once the tube is filled with liquid or the bubbles subside, the output value will return to normal. The transmitter circuit board has a plug-in design, and due to the significant vibrations in the pipelines or liquids at the measurement site, this often leads to the loosening of the power supply board of the flow meter. If it becomes loose, the flow meter can be disassembled and the circuit board resecured. 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