Electromagnetic flowmeter to the installation environment

A, selection of sensors installation environment electromagnetic flowmeter sensor is generally ip65 protection grade ( Dust-proof and one by one touch water protection grade level) And its main requirements: (installation environment 1) Sensors should be installed in dry and ventilated place, avoid flooding in the damp, easy seeper place, also should avoid direct sunlight and rain drench water directly; ( 2) Should as far as possible avoid installation where the ambient temperature is too high. The size of the structure of the electromagnetic flowmeter is subject to electronic environment temperature, lower; ( 3) Installation of sensor line should have no strong leakage current, should as far as possible away from strong electromagnetic field equipment, such as big electromechanical, transformer, lest cause electromagnetic interference; ( 4) Sensor installation of pipe or should not have a strong vibration, especially the shape meter; ( 5) The location of the installation of sensors to consider staff on-site maintenance space. The choice of two, electromagnetic flow meter transducer installation environment converter as a field indicates the installation with the instrument, its installation site should choose commonly: at ambient temperatures Between 10 ~ 45 ℃. The air relative humidity & le; 85% 6; Installation location without strong vibration; Ambient air does not contain corrosive gases; Converter should be installed in the interior. When installed in the outdoor, also from prevention measures should be taken. Three, the electromagnetic flowmeter to the installation site has the following requirements: 1. Measurement of mixed phase flow, choose the place that does not cause phase separation; When measuring the two-component liquid, avoid in has not yet been mixing downstream; When measuring chemical reaction, in response to fully complete section downstream straight pipe respectively before and after to meet not less than 5 d and 2 d; 2. The place that is easy to realize sensor separate grounding; 3. As far as possible to avoid the environment has a high concentration of corrosive gas; 4. As far as possible to avoid the measuring tube into a negative pressure; 5. Avoid near a big motor, transformer, etc. , so as not to cause electromagnetic interference; 6. Choose the little vibration, especially for a size instrument; 7. As far as possible to avoid direct sunlight. Four, electromagnetic flowmeter installation recommendations: electromagnetic flowmeter measurement principle is not dependent on the characteristics of the flow, if the line has some turbulence and vortex in the measurement area ( Such as elbow, tangential current limiting or upstream of half cut-off valve) Has nothing to do with the measurement. If there is a steady state of the eddy current in the measurement zone will affect the stability of measurement and measurement precision, then you should take some measures to stabilize the velocity distribution: a. Increasing the length of the straight pipe before and after b. Meters with a flow stabilizer c. Reduce the cross section of measurement point.

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