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How to eliminate the intelligent electromagnetic flowmeter scale noise?

Abstract: the intelligent electromagnetic flowmeter scale how to eliminate the noise? Information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. To solve the problem of the intelligent electromagnetic flowmeter noise must first on fluid noise, discuss the attack, the elements of progress to find a way to reduce the fluid noise and sensor signal to noise ratio (especially for the weak excitation current Electromagnetic water meter, two wire system of electromagnetic flow meter) . More flow meter manufacturers choose model price quote you are welcome to inquire, here is the intelligent electromagnetic flowmeter scale how to eliminate the noise? The article details. To solve the problem of the intelligent electromagnetic flowmeter noise must first on fluid noise, discuss the attack, the elements of progress to find a way to reduce the fluid noise and sensor signal to noise ratio (especially for the weak excitation current Electromagnetic water meter, two wire system of electromagnetic flow meter) Development and low velocity of flow ( 0. Below 1 m/s) And the high velocity ( More than 15 m/s) Flow measurement scale of development is of great significance. Fluid noise in the use of electromagnetic flowmeter in addition to the surrounding environment, the electromagnetic field, electrostatic field and other factors influence of the noise of the attack, the fluid noise measured medium is also very important influence factors. Flow noise is a kind of dc polarization voltage, particularly prominent in the low-frequency rectangular wave excitation method, often: slurry, activity and high velocity noise noise. The onset of flow noise factor has the following several conditions: 1, the corrosion of the stainless steel electrode is in its appearance has a very thin passivation layer, the electrochemical reaction to reach equilibrium condition. Fluid solid lighting strike in the electrode, the electrode surface passivation layer is damaged, lost electrochemical equilibrium. And metal materials and fluid medium touch with rehabilitation from scratch to generate surface passivation layer is insist on electrochemical balance ability. Arrive in electrochemical equilibrium time, free ions in the metal and fluid in the signal under the electric field effect of the electrochemical reaction. Solid particle impact electrode, continuous damage to maintain the passivation layer; Electrochemical reaction generated by repeated passivation layer, so the potential between the electrodes big ups and downs to change constantly, the change of potential flow fluid noise in the signal. This kind of condition that electromagnetic flowmeter in slurry noise in general. Theory and practice indicate that affect the electrochemical response signal increased frequency of the electric field change can reduce fluid noise and agile, it is the high frequency excitation and double-frequency excitation can be solved slurry measurement elements. 2, fluid friction material and electrode, fluid in the onset of positive and negative ions from the electrolyte fluid separation. Fabrics and electrode looks more rough, the higher free ion concentration. The electrode signals the effect of electric field, a don't ions will move to the electrode, a noise voltage, the noise is called noise. Active noise in low conductivity measurement embody more outstanding. Activities related to the intensity of the electric field noise, high velocity of the induction signal, the greater the noise fluctuation is, the greater the output will be very unstable. 3, fluid conductivity and pH change sharply, will constitute a noise, upstream dosing of flowmeter measurement instability is typical for example. Element is not the same when mixed in inhomogeneous medium, fluid, simple separation of positive and negative ions in the electrode signal the effect of electric field, a don't ions will move to the electrode, constitutes the noise voltage, output instability. Close to 4, due to the high velocity fluid fabrics and electrode parts of the laminar boundary layer thickness becomes very thin, as shown in figure 3, fabrics and electrode roughness height broke through the thickness of the laminar boundary layer flow velocity, and fluid knocked some roughness height, this attack velocity divergence and shock. There is a some of the same as the measuring tube center axis ( Or the opposite) The velocity of the weight, the signal the effect of the weighting function, the great influence of the electrode signal attack, constitutes a big positive error, this is high-end flow noise. Visible, the above activities noise and high velocity of flow noise with noise measurement of tube material and electrode surface roughness directly related, the slurry noise for the onset of polarization voltage and electrode surface roughness is there much. Bachok instrument science and technology as you recommend: intelligent electromagnetic flowmeter is above this paper all content, manufacturers welcome you to inquire my flowmeter selection, quotation, etc.

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