Why should the flow transmitter earth

Why should the flow transmitter grounding basically has the following two reasons: one, when cutting lines of magnetic force fluids flow signal, zero potential on the fluid itself, on an electrode positive potential, another electrode to produce negative potential, constantly changes. Converter input point C, therefore, must be at zero potential with fluid, so as to constitute a symmetric input circuits. Second, as a result of the transmitter output signal is very small, in order to improve the anti-interference ability, input circuits of zero potential must be grounded, to earth potential of zero potential. Transmitter at the same time measuring pipe shell grounding shield effect, can reduce the outside world and the electromagnetic interference of excitation system itself. So my company in order to make out LG - Better K orifice flowmeter measurement and guarantee the accuracy of measurement, the transmitter must be grounded. With the transmitter is to have a lot of characteristics of grounding electrode, measuring tube transmitter directly with fluid conduction, to guarantee the effect to the fluid of zero potential. Improve the anti-interference ability of the transmitter, the grounding of flange transmitter in structure than the simple, save material. But increased after the grounding electrode in the transmitter, the electrode seal reliability, greater demands of the processing technology of transducer, etc.

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