How does the electromagnetic flowmeter function

The electromagnetic flowmeter is a instrument panel that USES the magnetic effect of Faraday current to check the total flow of conductive liquid (the volume of liquid in a certain section over time) and the flow of water.

How does the electromagnetic flowmeter function

1, electromagnetic flowmeter transmitter should be installed in the room dry manic shade.Avoid installation in an area where the working temperature is too high, avoid obvious vibration, and avoid machine equipment with obvious electromagnetic field as much as possible.Such as large motor, transformer, etc.Prevent installation in places with corrosive vapors.The installation address should be conducive to maintenance, and it is the natural environment standard to ensure the normal operation of the transmitter.2. Gate valves and double circuit power supply shall be installed on both sides of the electromagnetic induction flow transmitter.

3, in order to ensure that the electromagnetic induction flow transmitter accurate measurement tube filled with the measured material, the transformer ** vertical installation, flow from the bottom up.Especially for liquid-solid two-phase flow, be sure to install vertically.If only horizontal mounting is allowed on the spot, make sure the two metal electrodes are in the same plane.

4. In order to prevent electromagnetic interference, data signals between transmitter and converter must be transmitted by shielding power lines.It is not allowed to put the communication cable and the power plug in the same cable in the same seamless steel tube.Communication cable length generally cannot exceed 30m.

5. The potential of a few millivolts of ac measured by a metal electrode of an electromagnetic induction flow transmitter is based on the potential difference of the liquid in the transmitter.In order to make the liquid potential difference stable and maintain equal potential for the transmitter and fluid mechanics, in order to ensure a smooth and accurate measurement, both sides of the transmitter shell and metal hose should have a good grounding device converter shell should also be connected to the ground device.

The resistance of the ground wire shall not exceed 10.If cannot assure transmitter case and metallic material pipeline are good touch, use metallic material transmission line to connect them mutually again rely on spectrum ground device.

6. In order to prevent the harm of accurate measurement of water flow, the flow control valve should be set in the middle and lower reaches of the transmitter.For calibre transmitters, the distance from the metal electrode core to the inlet end of the steam flowmeter is equal to several times the length of D D.Therefore, the upstream and downstream direct pipe can not do the requirements.But to specification very big steam flowmeter, general upstream and downstream need to have 5D or so straight pipe section, middle and downstream do not do straight pipe section regulation generally.

7, converter installation address should prevent ac, dc strong magnetic field and vibration.The working temperature is -20 to 50℃, without corrosive vapor, air humidity is not more than 80%.

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