Japan Standard Battery Operated Electromagnetic Velocity Flow Meter

(1) The liquid shall have the desired conductivity for the measurement. And the conductivity distribution is required to be substantially uniform. Therefore, the flow transmitter installation to avoid easy to produce non-uniform conductivity of the place, for example, near the upstream to join the liquid, the liquid point is best located downstream of the transmitter.

(2) Transmitter The measuring tube must be filled with liquid (except for the full tube type).Wastewater flow meter the transmitter should be installed at any time to measure where the inside of the catheter can be filled with liquid to prevent the illusion caused by the absence of a liquid in the catheter and the pointer is not zero. The measuring tube is preferably mounted vertically so that the liquid to be measured flows from the bottom up to the meter. In this way, it is possible to avoid the presence of a precipitate in the conduit or a bubble in the medium to cause a measurement error. If the installation can not be installed vertically, can also be installed horizontally. But to make the two electrodes on the same level.

(3) electromagnetic flowmeter signal is relatively weak, in the full range of only 2.5 ~ 8mV, flow is very small, the output only a few microvolts, the outside world can interfere with a slight measurement accuracy. Therefore, the transmitter's housing, shielded wire, measuring catheter, and the transmitter at both ends of the pipeline must be grounded. And the need to set a separate grounding point, never connected to the motor, electrical appliances and other public ground or on the sewer. The conversion part has been grounded through the cable, so hurry to ground again. So as to avoid the interference caused by the different ground potential.

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