How to install the LDE electromagnetic flow meter correctly

Abstract: The information on how to install the LDE electromagnetic flowmeter correctly is provided by the excellent flowmeter and flowmeter manufacturers. Due to many influencing factors, the flow meters used in industrial production have more than 10 principles and no less than 200 types. In the whole automation control system, the flow meter as the signal source, although the quantity only accounts for 1/5 of the system automation instrument, but the price. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the article details on how to install the LDE electromagnetic flowmeter correctly. Due to many influencing factors, the flow meters used in industrial production have more than 10 principles and no less than 200 types. In the whole automation control system, the flow meter is the signal source, although the quantity only accounts for 1/5 of the system automation instrument, but the price accounts for about 1/3; it accounts for more than half of the monitoring instrument in the scientific evaluation of energy saving, consumption reduction and pollution emission. Therefore, it has an important position in the national economy. In the current production fields such as petrochemical industry, water resources treatment, food industry, etc., electromagnetic flowmeter has become a kind of flow measurement instrument that is quite commonly used. As a precision instrument, the meter has high conditions and requirements for installation and use. During use, due to negligence in operation and non-compliance with specifications, more or less situations will occur, which requires the operator to install Read the product instruction manual carefully before, follow the specification requirements of the use, and pay attention to choosing the correct installation location to give full play to the performance of the electromagnetic flowmeter, to effectively ensure the stability of its work, and to ensure the accuracy of its measured data. service life. The electromagnetic flowmeter sensor should be installed in a dry and ventilated place indoors. Avoid installing it in a place where the ambient temperature is too high, should not be subjected to strong vibration, and try to avoid equipment with strong magnetic fields, such as large motors, transformers, etc. Avoid installing it in places with corrosive gas. The installation site is convenient for maintenance. This is the environmental condition that guarantees the normal operation of the sensor. In order to ensure that the measuring tube of the sensor is filled with the measured medium, the transmitter should preferably be installed vertically with the flow direction from bottom to top. Especially for liquid-solid two-phase six, it must be installed vertically. If only horizontal installation is allowed on site, it must be ensured that the two electrodes are on the same horizontal plane. The AC potential of several millivolts measured by the electrodes of the electromagnetic flow sensor is based on the potential in the sensor. In order to stabilize the liquid potential and keep the sensor and the fluid at the same potential to ensure stable measurement, both ends of the sensor casing and the metal pipe should be well grounded, and the converter casing should also be grounded. The grounding resistance cannot be greater than 10∩ and cannot be shared with the grounding wire of other electrical equipment. If a good contact between the sensor housing and the metal pipes cannot be guaranteed, metal wires should be used to connect them. And then reliable grounding. To avoid interfering signals, the signal between the sensor and the converter must be transmitted with shielded wires. It is not allowed to place signal cables and power cables in parallel in the same cable tube. The length of the signal cable should generally not exceed 30m. The installation site of the converter should avoid strong AC and DC magnetic fields and vibration, the ambient temperature is -20-50℃, does not contain corrosive gas, and the relative humidity is not more than 80%. In order to avoid the influence of the relative measurement of the flow rate, the flow regulating valve should be placed downstream of the sensor. For small-diameter sensors, since the distance from the center of the electrode to the inlet end of the flowmeter is equivalent to several times the length of the diameter D, the upstream straight pipe may not be specified. However, for electromagnetic flowmeters with larger diameters, there should generally be a straight pipe section above 5D in the upstream, and generally no straight pipe section is required in the downstream. In short, the correct installation of the electromagnetic flowmeter sensor directly leads to its accuracy. To ensure the measurement accuracy of the electromagnetic flowmeter, the correct installation position is very important. If you are in a complex use site, it is difficult to choose the correct installation point. , please professional manufacturers in time, it is best to provide real photos of the scene, so that engineers can help you analyze and provide solutions. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'How to install the LDE electromagnetic flow meter correctly'
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