SBG257 Germany IFM electromagnetic flowmeter selection and installation

German IFM 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. Below I will detail the selection and installation of the SBG257 German IFM electromagnetic flowmeter. Let me talk about it:

First, 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 also has When ordering a meter, many customers often compare it with a water meter, thinking 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 according to the original pipe diameter. It is best to order the instrument diameter according to 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 the most critical point must be met: the pipe is full, and then Full tube. When the tube is not full, it is easy to cause the flowmeter to jump randomly:

Third, 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 For sensors), if the customer has requirements for the installation environment of the instrument and the installation location is in an underground well or other humid place, it is recommended that the customer choose a split type. In order to avoid damage to the instrument caused by wrong selection.

Fourth, the German IFM 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 lead to later use of the sensor. scrapped, causing inconvenience and economic losses to customers.

5. Although the German IFM 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 damage. pollute. 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.

Sixth, 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.

The German IFM electromagnetic flowmeter is a flowmeter that measures flow based on Faraday's law of electromagnetic induction. The advantage of electromagnetic flowmeter is that the pressure loss is extremely small and the measurable flow range is large. The ratio of maximum flow rate to minimum flow rate is generally more than 20:1, and the applicable industrial pipe diameter range is wide, up to 3m, the output signal is linear with the measured flow rate, and the accuracy is high. It can measure the fluid flow rate of acid, alkali, salt solution, water, sewage, corrosive liquid, mud, mineral pulp, paper pulp, etc. with conductivity ≥5μs/cm. But it cannot measure the flow of gas, steam and pure water.

When a conductor moves cutting magnetic field lines in a magnetic field, an induced electric potential will be generated in the conductor. The size of the induced electric potential depends on the effective length of the conductor in the magnetic field and the direction of movement of the conductor perpendicular to the direction of the magnetic field. Directly proportional to speed. In the same way, when the conductive fluid flows in the vertical direction in the magnetic field and cuts the magnetic induction force lines, it will also generate an induced electric potential on the electrodes on both sides of the pipe.

The German IFM electromagnetic flowmeter is simply composed of a flow sensor transmitter. The installation requirement of German IFM electromagnetic flowmeter is that it must be installed at the low point of the pipeline or the vertical section of the pipeline, but it must be when the pipe is full. The requirement for the straight pipe section is 5D in the front and 3D in the back, so as to ensure the electromagnetic flow rate. The use of meters and the requirements for accuracy.