Electromagnetic flowmeters have many advantages, but what causes the electromagnetic flowmeter to produce errors. Electromagnetic flowmeters have many advantages, but what causes the electromagnetic flowmeters to produce errors. These problems are very worthy of our attention. Today Let me analyze the reasons for the electromagnetic flowmeter:
The liquid in the electromagnetic flowmeter tube is not full. Due to insufficient back pressure or poor installation position of the flow sensor, the liquid in the measuring tube is not filled, and the fault phenomenon is different due to the degree of imperfection and the flow condition. If a small amount of gas is stratified or wavy in the water pipe, the fault phenomenon shows an increase in error, that is, the flow measurement value does not match the actual value; if the flow is a bubble flow or a plug flow, the fault phenomenon does not match the actual value. In addition, the output sloshing occurs due to the vapor phase instantaneously covering the surface of the electrode; the solid phase liquid contains solids such as powder, particles or fibers, which may cause malfunctions; slurry noise; contamination of the electrode surface; conductive deposition layer or insulation The deposited layer covers the electrode or lining; the lining is worn or covered by deposits, and the flow cross-sectional area is reduced.
Electromagnetic flow sensor, liquid that may crystallize, electromagnetic flowmeter should be used with caution. Some easily crystallized chemical materials can be measured normally under normal temperature conditions. Because the conduit for transporting fluid has good heat insulation, and the electromagnetic flowmeter The upstream pipeline heating insulation is strengthened. In the pipe connection method, it is convenient to disassemble and disassemble the flow sensor, and it is convenient to remove the maintenance once it is crystallized.
Therefore, when the fluid flows through the measuring tube, it is easy to cause a solid layer on the inner wall due to the temperature drop. Since the flow meter measurement using Other principles also has crystallization problems, in the absence of other better methods, these can be said to be some of the best ways to make errors in the electromagnetic flowmeter.
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