LDGThe Type Intelligent Electromagnetic Flow Meter is a fully intelligent electromagnetic flow meter developed by our company using advanced domestic and foreign technologies. Its all Chinese electromagnetic converter core adopts a high-speed central processing unit. The calculation speed is very fast, the accuracy is high, and the measurement performance is reliable. The converter circuit design adopts international advanced technology, with an input impedance of up to10¹⁵Ohm, with a common mode rejection ratio superior to100dbRegarding external interference and60Hz/50HzSuperior interference suppression capability90db,It can measure the flow rate of fluid media with lower conductivity. The sensor adopts non-uniform magnetic field technology and a special magnetic circuit structure, which makes the magnetic field stable and reliable, and greatly reduces the volume, reduces repetition, and makes the flowmeter small and flow oriented. Our company's mission is to provide customers with peace of mind when buying, worry free when using, and satisfactory service.

Product Features：Guangzhou Minghong Automation Instrument Co., Ltd

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1There are no movable parts or flow blocking components in the pipeline, and there is almost no additional pressure loss during measurement.

2The measurement results are independent of physical parameters such as flow velocity distribution, fluid pressure, temperature, density, viscosity, etc.

3On site, the range can be modified online according to the actual needs of the user.

4High definition backlightLCDDisplay, fully Chinese menu operation, easy to use, simple to operate, easy to learn and understand.

5AdoptingSMDDevices and surface mount（SMTHigh circuit reliability).

6Adopting16The embedded microprocessor has fast computing speed, high accuracy, programmable low-frequency rectangular wave excitation, improved stability of flow measurement, and low power consumption.

7Full digital processing, strong anti-interference ability, reliable measurement, high accuracy, and a flow measurement range of up to150:1

8Ultra lowEMISwitching power supply, with a wide range of voltage variations, resistant toEMCgood

9There are three integrators inside that can display the forward cumulative amount and the difference cumulative amount respectively. There is also a non power down clock inside that can record16Second power outage time

10HavingRS485、RS232、HartandModbusWaiting for digital communication signal output.

11Having self inspection and self discussion skills

Working principle

The measurement principle of an ammeter is based on Faraday's law of electromagnetic induction. The measuring tube of the flowmeter is a non-magnetic alloy short tube lined with insulating material. Two electrodes are fixed on the measuring tube by passing through the tube wall along the diameter direction. The electrode tip is basically flush with the inner surface of the lining. When the excitation coil is excited by two pulse waves, a magnetic flux density of will be generated in the direction perpendicular to the axis of the measuring tubeBThe working magnetic field. At this point, if a fluid with a certain conductivity flows through the measuring tube. Induction of electromotive force by cutting magnetic field linesE. Electromotive forceEProportional to the magnetic flux densityBMeasure the inner diameter of the tubedCompared to the average flow velocityvThe product of. electromotive forceEThe flow signal is detected by electrodes and sent to the converter through cables. After amplifying and processing the flow signal, the converter can display the fluid flow rate and output signals such as pulses and analog currents for flow control and regulation.E=KBdv

In the formula:E---------------Signal voltage between electrodes（v）

B-----------------Magnetic flux density（T）

d------------------Measure the inner diameter of the tube（m）

v------------------Average flow velocity（m/s）

Wherek, dAs the excitation current is constant, thereforeBIf it is also a constant, then it is determined byE= KBdvIt can be seen that volumetric flow rateQCompared to signal voltageE-Proportional, that is, the signal voltage induced by flow velocityECompared to volumeQEstablish a linear relationship. Therefore, as long as the measurement is takenEYou can determine the traffic flowQThis is the basic working principle of an electromagnetic flowmeter.

causeE=KBdvIt can be inferred that parameters such as temperature, density, pressure, conductivity, and liquid-solid composition ratio of the measured flow medium will not affect the measurement results. As for the flow state, as long as it conforms to axisymmetric flow (such as laminar or turbulent flow), it will not affect the measurement results. Therefore, electromagnetic flowmeter is a true volumetric flowmeter. For manufacturers and users, the volumetric flow rate of any other conductive fluid medium can be measured without any correction as long as it is calibrated with ordinary water. This is a prominent advantage of electromagnetic flow meters, which is not found in any other flow meter. There are no active or obstructed components inside the measuring tube, so there is almost no pressure loss and high reliability.

2Main technical parameters