Wastewater electromagnetic flowmeter is widely used in the flow measurement of conductive liquid media, with waterproof, anti-corrosion, anti-interference, lightning strike resistance.
There are no moving parts or flow-blocking parts in the sewage electromagnetic flowmeter pipeline, and there is almost no additional pressure loss during measurement. The following is a brief introduction by our company's technicians on the grounding ring (grounding electrode) of the sewage electromagnetic flowmeter.
1. Function of grounding ring: The grounding ring is in direct contact with the medium through the grounding electrode, and then grounded to the instrument flange through the grounding ring to achieve the same potential as the ground to eliminate interference. The F46 lining sensor should use a protective grounding ring, which is fixed to the flange with screws to protect the flange of the lining from damage.
2. The material of the grounding ring is generally stainless steel. Special requirements can be specified when ordering.
3. Standard grounding ring: On plastic and cathodic protected pipes with insulated inner and outer walls to protect against electrolytic corrosion, grounding rings must be installed on both sides of the sensor.
4. Neck protection ring: If the medium is highly abrasive, a neck protection ring should be used to protect the lining.
5. When should a grounding ring (grounding electrode) be used? For measurement needs, the electromagnetic flowmeter converter must have a strong ability to resist common-mode interference. Its input amplifier is a differential input design, so one of the common reference grounds is required. This "ground" must be connected to the ground of the signal source. For the electromagnetic flowmeter, it is in contact with the medium.
6. How to contact the medium? The medium is in the pipeline. If the process pipeline is made of conductive material, this pipeline can be considered as the "ground" and the grounding wire can be led out to the converter through the pipeline flange.
7. If the process conduit is made of non-conductive material, or is a metal pipe with an insulating material lining inside, a grounding ring or grounding electrode that extends into the pipe and contacts the medium is necessary. That is to say, when the process conduit is made of non-conductive material, or the process pipe is metal but has an insulating material lining inside, a "grounding ring" or "grounding electrode" is required.
Hangzhou Economic Development Area，Hangzhou 310018，China
