The role of the electromagnetic flowmeter grounding ring: If the pipe connecting the meter (relative to the measured medium) is insulated, a grounding ring must be used.
The role of the electromagnetic flowmeter with a grounding ring: The role of the electromagnetic flowmeter grounding ring: If the pipe connecting the meter (relative to the measured medium) is insulated, a grounding ring must be used. Its material should be based on the measured medium. Corrosive selection. If the lining material of the electromagnetic flowmeter sensor is polytetrafluoroethylene (PTFE), a grounding ring should be used to protect the flange of the PTFE from damage.
Second, why should the electromagnetic flowmeter be grounded:
Whether the electromagnetic flowmeter sensor shell is grounded or not is directly related to the accuracy and stability of the measurement. The grounding wire must not conduct any interference. voltage, so other electrical equipment should not be connected to the same ground wire. When the meter leaves the factory, the output section of the converter has been set with a ground wire. As long as it is grounded as required, since the sensor is connected to the metal pipe, the medium in the metal pipe has a good electrical connection with the earth, so the sensor does not need to be installed with a ground wire. If there are higher requirements for grounding, or the surrounding working environment has When there is strong electromagnetic interference, you can also set up a separate ground wire.
Third, installation precautions:
When the electromagnetic flowmeter sensor is installed on a plastic pipe or a pipe with insulating coating or paint, grounding wires should be installed at both ends of the sensor. Make the measured medium in the pipe short-circuit with the earth and have zero potential, otherwise the electromagnetic flowmeter will not work properly.
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