Things to note before using LDG electromagnetic flowmeter

The measurement principle of electromagnetic flowmeter is based on Faraday's law of electromagnetic induction. The measuring tube of the flow meter is a short non-magnetic alloy tube lined with insulating material. Two electrodes penetrate the tube wall along the diameter direction and are fixed on the measuring tube. The electrode tip is basically flush with the inner surface of the liner. When the excitation coil is excited by a square wave pulse, a working magnetic field with a magnetic flux density B will be generated in the direction perpendicular to the axis of the measuring tube. At this time, if the fluid with a certain conductivity flows through the measuring tube. Cutting the magnetic field lines induces an electromotive force E. The electromotive force E is proportional to the magnetic flux density B, the product of the inner diameter d of the measuring tube and the average flow velocity v. The electromotive force E (flow signal) is detected by the electrode and sent to the converter through the cable. After the converter amplifies and processes the flow signal, it can display the fluid flow and output pulses, simulated current and other signals for flow control and regulation.

1. Select the location and location of the smart electromagnetic flowmeter to be installed as needed, but the electrode axis must be roughly in the horizontal direction;

2. Note that the flow direction on the flow meter is consistent with the actual flow direction of the fluid;

3. The measuring tube must be filled with medium at all times. Only when the tube is full can accurate measurement be obtained. For partially filled tubes, the Use an installation method similar to the pressure relief valve. Do not install it at the lowest point to prevent solid accumulation. In addition, to prevent the generation of vacuum, avoid installing the sensor at the inlet end of the pump;

4 . The pipes on both sides of the flow meter should be firmly supported and should not be installed in places with strong vibrations;

5. For vortex or spiral flow of fluid, the upper and lower straight pipe sections should be lengthened and flow straighteners should be installed. ;