Electromagnetic flowmeter selection and installation instructions

Electromagnetic flowmeters are widely used in sewage, fluorine chemicals, production water, tap water industry, medicine, steel and many other aspects. Because of the principle, it can only measure conductive liquids. Although it is much better than other types of flowmeters in terms of reliability and stability, customers may still encounter some problems during actual use. Let me talk in detail about the selection and installation of electromagnetic flowmeters: 1. like other flowmeters, although the measurement range ratio of the electromagnetic flowmeter is 30:1, which is higher than the vortex flowmeter and the differential pressure flowmeter, it is also limited. Many customers often put the Compared with water meters, it is thought that it can measure very low flow rates. Under normal circumstances, it can only measure 0.1m/s. Below this flow rate, it is difficult for the electromagnetic flowmeter to measure correctly. Therefore, it is necessary to clarify the flow range ratio at the initial stage of ordering. When ordering, you cannot order based on the original pipe diameter. You must determine the instrument diameter based on your actual flow rate. Second, like other flowmeters, electromagnetic flowmeters also have requirements for straight pipes before and after installation, but the requirements are lower than other types of flowmeters, but one key point must be met: full pipes, and then full pipes. When the tube is not full, it is easy to cause the flowmeter to jump randomly: 3. Like other flowmeters, electromagnetic flowmeters also have protection levels. Generally, the protection level of the integrated type is IP65, and the split type is IP68 (for sensors). If the customer There are requirements for the installation environment of the instrument. The installation location is in an underground well or other humid places. It is recommended that customers choose split type. In order to avoid damage to the instrument caused by wrong selection. Fourth, the electromagnetic flowmeter can measure corrosive liquids, but customers must correctly provide other measurement medium properties at the initial stage of ordering to avoid errors in electrode selection during model selection, which may cause the sensor to be scrapped during later use, causing inconvenience and inconvenience to customers. Economic losses. 5. Although the electromagnetic flowmeter has relatively good reliability and will not be damaged under normal circumstances, due to its principle, the sensor electrode surface is always in contact with the liquid. Over time, the electrode surface is more susceptible to contamination. Therefore, under normal circumstances, if the customer has the conditions to dismantle the electromagnetic flowmeter, it is recommended to disassemble it and clean the electrodes once every one to one and a half years to ensure the measurement accuracy of the entire flowmeter. Any instrument requires "maintenance", and electromagnetic flowmeters are no exception. 6. When the main pipeline is a vertical pipeline, under normal circumstances, the water flow is required to be from bottom to top, and try not to flow from top to bottom. The latter can easily cause large flow fluctuations. In addition to the full pipe installation, this is also very important, followed by the distance between the front and rear straight pipes.