Electromagnetic flow meter scale A/D saturated the cause and the treatment method

Abstract: the electromagnetic flow meter scale A/D saturated the cause and the treatment method of information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Electromagnetic flowmeter when applied to A/D saturation, electromagnetic flowmeter is usually wrong or the pipe installation medium mixed with heterogeneous material, etc. Electromagnetic flowmeter installation is mainly manifested in the following aspects: 1. Eccentric sealing gasket ( Misalignment. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the electromagnetic flow meter scale A/D saturated the article details the cause and the treatment method. Electromagnetic flowmeter when applied to A/D saturation, electromagnetic flowmeter is usually wrong or the pipe installation medium mixed with heterogeneous material, etc. Electromagnetic flowmeter installation is mainly manifested in the following aspects: 1. Eccentric sealing gasket ( Misalignment center) 。 Sealing gasket installation eccentric, cover some of the circulation area, make the velocity distribution asymmetry of serious distortion. Due to the asymmetric flow occurred in the flow sensor imports, the length of straight pipe upstream is zero, the differential pressure type, turbine, and vortex street type, ultrasonic type, target type, such as electromagnetic instrument measurement error. For example DN50mm electromagnetic flowmeter liner eccentric 10 mm, the measurement error is as high as 4% ~ 10%. 2. Lack the necessary protective parts 3. Sealing gasket between instrument and pipeline diameter Dg is less than the pipe diameter Dp and meter diameter Dm beam. Dg should be slightly bigger than the Dm, such as Dg4. Standard orifice of the acute Angle is not welcomed in stream surface 5. Will be for vibration interference are sensitive instrument installed in 6 on the vibration of the pipes. The meter is in the wrong direction of flow. Eccentric sealing gasket inside diameter is too small or install while on the displacement, the float type, coriolis mass type instrument, such as flow value has no effect or little effect, but may increase the risk of additional pressure loss. Upstream disturbance source disturbance source and the downstream and upstream of the disturbance source spiral weld pipe and all kinds of choke pipe fittings ( Such as elbow, reducer, pipe and valve) , according to the disturbed flow is classified into two categories, category 1 velocity distribution have distortion and secondary flow; 2 class except velocity distribution distortion and secondary flow and vortex. All kinds of pipe fittings in zui is bent pipe and all kinds of pipe bending combination ( As the plane double bend and solid double bend) 。 All kinds of flow meters to upstream flow disturbance sensitivity is differ, so to put forward their own installation requirements. Downstream disturbance source mainly bent pipe, valve, etc for fluid flow disturbance is transmitted back, can affect the distance of a few times the length of pipe diameter. In most cases, 5 times the pipe diameter downstream straight pipe is enough; Some exception may be a bit longer, but can think 10 times the diameter of the downstream straight pipe, can reliably handle any downstream pipe produced by the disturbance. Such as straight pipe length can't meet the requirements and to ensure the accuracy of measurement, one can take the following two alternative way to 1) In instrument installed upstream flow regulator mentioned in section below. 2) Under the condition of on-site installation calibration, or in the same site installation conditions of flow disturbance resistance together with the instrument, the real flow calibration device calibration in the laboratory. Quality of mixed with heterogeneous content: 1. In the liquid mixed with gas ( Bubble) 2. Wear and sedimentary scale 3. Gas condensate in 4. Air pockets form mistakes above is all there is in this article, you are welcome to inquire me factory flowmeter selection, quotation, etc.

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