According to the working principle of electromagnetic flowmeter to determine the installation requirements

Determined according to the working principle of the electromagnetic flowmeter flowmeter its installation requirements, especially the flowmeter with intelligent LCD screen, installation location should avoid direct sunlight, temperature between 5 ℃ ~ 55 ℃. To avoid the strong interference sources to choose without strong electromagnetic field radiation of site installation flowmeter, avoid such as motor, transformer, inverter and other easy to cause electromagnetic interference equipment. Electromagnetic flowmeter measurement principle is based on Faraday's law of electromagnetic induction, it produces the original signal is very weak, lack of mv. If there is a strong electromagnetic field radiation near the flowmeter, will influence the accuracy of the measurement, even can't work normally. Straight pipe length note as far as possible to avoid eddy current components, such as all kinds of valves, elbow, bypass, extend the straight pipe upstream and downstream of the flow meter, as far as possible when it is necessary to install rectifier tube, to ensure the straight pipe upstream of flowmeter must be 5 DN ( Measuring diameter) Or above, more than the downstream guarantee in 2 DN. Liquid conductivity must be uniform and stable do not install the meter in the uneven flow conductivity body. If the upstream have different medium injection, will result in uneven conductivity, and will affect the measurement. In this case, it is recommended that the sprue will be moved to the downstream; If you must from upstream injection, should as far as possible away from the meter. In general, it is better to keep a distance of more than 20 DN to ensure liquid mix evenly. Keep the electrode axis at a level of electromagnetic flowmeter connection shall conform to the installation guide. Note: if the installation conditions, please keep the allowed Angle 45 ° or less. No bubble in flow meter installed when the pipeline design should ensure that no air bubbles. Pipe flowmeter can full pipe flow meter installed in either horizontal, vertical, and tilted. But the line structure should guarantee the measuring tube must always be filled with liquid ( Full package) 。 Piping design pay attention to ensure measurement section without air bubbles, otherwise will cause unstable measurement, and deviation is too large. The choice of the ways of installation if the medium containing solid particles or the slurry to be measured, suggested that the vertical installation ( Flow from bottom to top) To avoid solid particle deposition in flowmeter measurement tube. Flow meter in the level or tilted when installation, the electrode axis should be in a level position. If the electrode axis vertical to the ground, easily gathered near the bubble at the top of the electrode. Piping installation to avoid flow meter in the upstream and downstream piping is wrong or tilted, and maintain and upstream and downstream flange alignment. Before installation to remove welding residue and bump and mat gasket. Electromagnetic flowmeter after loaded on the pipe should be banned in the section on welding work, prevent lining damaged.

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