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Note on the use of the grounding ring of the flowmeter

by:Sure     2021-08-08
Based on the needs of measurement, the electromagnetic flow converter must have strong resistance to common mode interference, and its input amplifier is designed for differential input, so one of the common reference grounds is necessary, and this ground must be connected to the ground of the signal source. , For electromagnetic flowmeters, it means contact with the medium. How to access the medium? The medium is in the pipeline. If the process pipeline is made of conductive material based on the needs of measurement, the electromagnetic flow converter must have strong anti-common-mode interference capability, and its input amplifier is designed for differential input, so one of the common reference grounds is necessary , This 'ground' must be connected to the ground of the signal source. For the electromagnetic flowmeter, it means contacting the medium.  How to get in contact with the medium?  The medium is in the pipeline. If the process pipeline is made of conductive material, the pipeline can be considered as 'ground   If the process conduit is made of non-conductive material, or a metal pipe with an insulating material liner 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 pipe is made of non-conductive material, or the process pipe is made of metal but is lined with an insulating material liner, a 'ground ring' or 'ground electrode' is required.
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