Electromagnetic flow meter scale sensor how to properly installed

Abstract: the scale of electromagnetic flowmeter sensor is how to correct installation information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Electromagnetic flowmeter is widely used in sewage, fluorine chemical industry, production water, tap water industry and pharmaceutical, steel, and so on many aspects. Because principle determines it can only measure conductive liquid. Although it in terms of reliability and stability are better than other kinds of flowmeter. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a scale of electromagnetic flowmeter sensor article details how to properly installed. Electromagnetic flowmeter is widely used in sewage, fluorine chemical industry, production water, tap water industry and pharmaceutical, steel, and so on many aspects. Because principle determines it can only measure conductive liquid. Although it in terms of reliability and stability are much better than other kinds of flowmeter, but customers in the process of actual use, or will happen some problems, in this paper, the electromagnetic flowmeter detailed said on the selection and installation. Electromagnetic flowmeter sensor installation should pay attention to the following questions: one, the installation place of ordinary electromagnetic flow enclosure protection grade reaches IP65 ( GB4208 rules of dustproof splash water level) To the requirements of the installation site is: 1) When measuring mixed phase flow, should choose the place that does not cause phase separation; 2) Choose the place that there will be no negative pressure measuring tube; 3) Avoid installation near high voltage equipment such as motors, transformers, lest cause electromagnetic interference; 4) Avoid installed around the place that has a strong corrosive gas; 5) The environment temperature should be in commonly - 25 ~ 60 ℃ range, as far as possible, avoid direct sunlight. 6) Installed in no vibration or the place of small vibration. If the vibration is too large, should in the sensor before and after the pipe plus fixed support. 7) Environmental relative humidity shall generally be in the range of 10% ~ 90%; 8) Avoid installed in straight tube can be rain or submerged by water. If the sensor is IP67 protection grade ( Dust-proof and flooding level) Or IP68 ( Dust-proof and diving level) Zui, after two can not make the request. Second, the straight pipe length electromagnetic flowmeter requirement for straight pipe length before table is low. Typically, for 90 & deg; Elbow, tee, tee, reducer, and fully open the valve and flow resistance and attachments from the sensor electrode shaft centerline ( Not sensor import face) Should be a 3 - 5 d straight pipe length; For different opening of the valve and will have 10 d straight pipe length; Commonly after sensor should have a 2 d straight pipe length. When the valve is not fully open, if the direction of the valve closure and sensor electrode axis 45 & deg; Installation, can greatly reduce the additional error. Three, installation position and flow direction of electromagnetic flow sensor can be horizontal, vertical or inclined installation. When mounted horizontally, the sensor electrode shaft must be placed. This will prevent the entrained air bubbles due to fluid and the electrode insulated short time; Also can prevent electrode is covered by fluid in the sediments. Should not install the sensor in zui high, in order to prevent gas buildup, installed in a piping zui high, as the poor installation location, should be avoided. Vertical installation, should make the direction of flow upward, this makes no flow or flow is very small, the entrainment of fluid in the heavier solid particles sinking, and lighter fatty substances rising leave sensor electrode area. Measure the mud, the liquid-solid two phase flow such as pulp, vertical installation can avoid solid phase precipitation and sensor lining uneven wear. The pipeline under always exit, for bad installation location, should be avoided. Back pressure sensor installation area should be, sensor export direct emptying of the measuring tube liquid filled tube, for bad installation location, should be avoided. In order to prevent to produce negative pressure sensor, the sensor should be mounted at the rear of the pump, and should not be installed in the front of the pump. Four, install bypass pipe for liquid flow static check and adjust the zero point, when the medium and small diameter should install bypass pipe as far as possible. Should be considered when measuring sediment containing fluid, easy to clean the sensor installation method. Five, the ground in order to make the measuring accuracy and electrode current corrosion will not occur, electromagnetic flow sensor must be separate grounding, and makes the sensor and the fluid around at the same potential. Separation type electromagnetic flow meter, grounding in principle should be in sensor, converter grounding should be in the same place, in most cases, the sensor of built-in reference electrode or metal tubes can ensure potential balance. Therefore, can be built in ground reference electrode and metal pipe flow, the sensor of the ground lug connected to ground wire. If the sensor is installed on the pipeline with cathodic corrosion protection, in addition to the sensor and grounding ring together, with a thick copper wire around the sensor jumper on two flanges in the pipeline, between the sensor and the cathodic protection current. Electromagnetic flowmeter during installation or operation flow shows negative this is normal phenomenon, reinstall. Sensors according to flow to the logo not installed, resulting in measurement in the opposite direction. The fault will certainly have the solution, so there's no need to worry about. Measuring pipe hollow tubes or not full of pipe, there is a gas. The meter will show a negative number or flow value, big and small. The sensor signal lines, because the electromagnetic flowmeter to the positive and negative function of the flow measurement, shows the reverse flow. Will signal switch. Full of measured medium, make the pipe flowmeter with measuring conditions. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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