Application situation

The intelligent electromagnetic flowmeter consists of two parts, the sensor and the converter. It is based on Faraday's law of electromagnetic induction and is used to measure the volume flow of a conducting liquid. It is a velocity meter. In addition to measuring the volume flow of ordinary conductive liquid, it can also be used to measure the volume flow of strong acid, alkali and other strong corrosive liquid and slurry, pulp, pulp and other uniform liquid and solid two-phase suspension liquid. Widely used in petroleum, chemical, metallurgy, textile, paper making, environmental protection, food and other industrial sectors and municipal management, water conservancy construction, river dredging and other fields of flow measurement.

Instrument characteristic

The measurements are free of the effects of fluid density, viscosity, temperature, pressure, and conductivity.

The measurement of no flow parts in the pipe, no pressure loss, the straight pipe segment is required to reduce. It has unique adaptability to slurry measurement.

Reasonable selection of electrode and lining material, that is, good corrosion resistance and wear resistance.

Full digital processing, anti-interference ability, reliable measurement, high accuracy, wide flow measurement range.

Ultra low EMI switching power supply, suitable for power supply, wide range of voltage changes, good EMI resistance.

With 16 bit embedded microprocessor, it has the advantages of high speed, high precision, low frequency square wave excitation and programmable excitation frequency. It improves the stability of flow measurement and low power consumption.

With SMD device and surface mount (SMT) technology, the circuit has high reliability.

There are no moving parts in the pipeline, and there is no flow resistance component. There is almost no additional pressure loss in the measurement.

In the field, according to the actual needs of users to modify the scale online.

High resolution backlight LCD display, all Chinese menu operation, easy to apply, easy to operate, easy to learn and easy to understand.

With RS485, RS232, Hart and Modbus, Profibus-DP and other digital communication signal output (optional).

Self checking and self diagnostic function.

Hour total record function, record the total amount of flow by hour, apply to time-sharing metering system (optional)

The internal has three calculators, which can display forward cumulants, reverse cumulants and differential values respectively. There is a power down clock inside, which can record 16 times of power loss (optional).

  

According to Faraday's principle of electromagnetic induction, a pair of detection electrodes installed in the pipe wall is vertical pipe axis and the magnetic field and measurement, when the conductive liquid along the axis of movement of the measuring tube, conductive liquid cutting magnetic lines induced EMF, the induction voltage detected by two electrode detection, and the flow rate is proportional to the magnitude of the value. For: E=B.V.E.K

Type: e - emf;

K coefficient associated with the distribution of magnetic field and axial length;

B magnetic induction;

The average velocity V of conductive liquid;

D electrode spacing (measuring tube diameter);

Principle diagram of electromagnetic flowmeter measurement

The sensor transmits the induced potential E as the flow signal to the converter. After amplification, conversion, filtering and other signal processing, the instantaneous flow and accumulated flow are displayed with a backlit dot matrix liquid crystal. Converter with 4~20mA output, alarm output and frequency output, and a RS-485 interface and supports HART and MODBUS protocol.