Precautions for installation of electromagnetic flow meter

Abstract: The information on the installation precautions of electromagnetic flowmeters is provided by the excellent flowmeter and flowmeter manufacturers and quotation manufacturers. The measurement principle of the electromagnetic flowmeter does not depend on the characteristics of the flow. If there is a certain turbulent flow and vortex in the pipeline, it has nothing to do with the measurement. A. There should be no large vibration source at the installation site, and reinforcement measures should be taken to stabilize the pipeline near the instrument. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following are the details of the article on the installation precautions of electromagnetic flowmeters. The measurement principle of the electromagnetic flowmeter does not depend on the characteristics of the flow. If there is a certain turbulent flow and vortex in the pipeline, it has nothing to do with the measurement. A. The installation site should not have a large vibration source, and reinforcement measures should be taken to stabilize the pipeline near the instrument; B. It should not be installed near equipment that generates large magnetic fields such as large transformers, motors, pumps, etc., so as to avoid interference from electromagnetic fields; C. When the sensor is connected to the pipeline, the full pipeline should be ensured, preferably vertical installation; D. The transmitter shell, shielded cable, the measurement body and the pipeline at both ends should be grounded, the grounding electrode should be set separately, and the grounding resistance should be less than 10 ohms , can not be connected to the electrical or public grounding network; E. It is required to have a straight pipe section with the diameter of the first 5 times and 3 times the pipe diameter. If there is a steady-state eddy current in the measurement area, it will affect the stability and accuracy of the measurement. At this time, the length of the front and rear straight pipe sections can be increased, a flow stabilizer can be used, or the section of the measurement point can be reduced to stabilize the flow velocity distribution. The flowmeter can be installed horizontally and vertically, but it should be ensured to avoid the influence of deposits and air bubbles on the measuring electrode, and the electrode axis should be kept horizontal. When installed vertically, the fluid should flow from bottom to top. The sensor cannot be installed in the highest position of the pipeline, which is prone to accumulation of air bubbles. Make sure that when the flow sensor is measuring, the pipe is full of the fluid to be measured, and the pipe cannot be partially full. If the pipeline is not full or the outlet is empty, the sensor should be installed on a siphon. The conventional straight pipe section requirements of electromagnetic flowmeters are 10D in the front and 5D in the back, and there are different requirements in the case of elbows and valves. The reason why the electromagnetic flowmeter is grounded: The measuring electrode in the electromagnetic flowmeter is in a DC or AC electric field. If its environment cannot be effectively shielded in a non-interference condition, it will seriously interfere with the measurement. Whether the sensor shell is grounded or not is directly related to the accuracy and stability of the measurement. The grounding wire must not transmit any interference voltage. Therefore, the electromagnetic flowmeter requires a very reliable grounding and grounding shielding. Otherwise, interference current will be generated. However, the advantages of grounding the electromagnetic flowmeter: If the pipeline connecting the sewage flowmeter is insulating (relative to the measured medium), a grounding ring should be used, and its material should be selected according to the corrosiveness of the measured medium. If it is a PTFE sensor, in order to protect the PTFE flanging from damage, a grounding ring should be used. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Electromagnetic flow meter installation precautions'

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