SKLD explosion-proof electromagnetic flowmeter

The SKLD series explosion-proof electromagnetic flowmeter utilizes constant current low-frequency three value rectangular wave or dual frequency rectangular wave excitation, which not only has the advantages of rectangular wave magnetic field, but also overcomes the disadvantages of sine wave magnetic field; It can also eliminate errors caused by fluctuations in power supply voltage, changes in power supply frequency, and changes in excitation coil impedance; And it has zero stability and is not affected by fluid noise interference. The measurement principle of explosion-proof electromagnetic flowmeter is based on Faraday's law of electromagnetic induction. The explosion-proof electromagnetic flowmeter consists of a sensor and a converter. The sensor is installed on the measurement pipeline, and the converter can be combined with the sensor to form an integrated electromagnetic flowmeter. The converter is installed within 30 meters or 100 meters of the sensor, and the two are connected by a shielded cable to form a split electromagnetic flowmeter. The main components of the intelligent anti-corrosion electromagnetic flowmeter sensor are: measuring tube, electrode, excitation coil, iron core, and magnetic yoke housing.

Explosion proof electromagnetic flowmeter is mainly used to measure the volumetric flow rate of conductive liquids and slurries in closed pipelines. Such as water, sewage, mud, pulp, various acids, alkalis, salt solutions, food slurries, etc. Widely used in production process flow measurement and control in industries such as petrochemicals, steel metallurgy, water supply and drainage, water conservancy irrigation, water treatment, total control of environmental wastewater, papermaking, pharmaceuticals, food, and other agricultural sectors; Suitable for measuring the total amount of conductive liquids.

Product features:

1. Programmable low-frequency rectangular wave excitation improves the stability of flow measurement and reduces power loss;

2. Adopting a 16 bit embedded microprocessor, it has fast computing speed and excellent accuracy;

3. All digital processing, anti-interference, reliable measurement;

4. Ultra low EMI switching power supply, suitable for a wide range of power supply voltage changes, with good EMC resistance performance;

5. Full Chinese character menu operation, easy to use, simple to operate, easy to learn and understand;

6. High definition backlit LCD display;

7. It has bidirectional flow measurement and bidirectional total accumulation functions, and bidirectional output functions for current and frequency;

8. There are three integrators inside that can display forward cumulative quantity, reverse cumulative quantity, and differential cumulative quantity respectively;

9. Equipped with RS485 or RS232 digital communication signal output

10. Equipped with conductivity measurement function, it can distinguish whether the sensor is empty or not;

11. The constant current excitation current has a wide range and can be used in conjunction with different companies and types of electromagnetic flow sensors;

12. Equipped with self checking and self diagnostic functions;

13. Adopting SMD devices and surface mount (SMT) technology, the circuit has high reliability;

14. The internal design of the instrument includes a non power failure clock that can record 16 power failure times.

Main technical data:

Technical data of the whole machine and sensors

Selection of SKLD-B series explosion-proof flowmeter instruments

◆ Range confirmation

Generally, explosion-proof flow meters for industrial use should have a measured medium flow rate of 2-4m/s. In special cases, the minimum flow rate should not be less than 0.2m/s, and the maximum flow rate should not be less than 0.2m/s

It should not exceed 8m/s. If the medium contains solid particles, the commonly used flow rate should be less than 3m/s to prevent excessive friction between the lining and the electrode; For viscous fluids,

The flow velocity can be chosen to be greater than 2m/s. A higher flow velocity helps to automatically eliminate the effect of viscous substances attached to the electrode, which is beneficial for improving measurement accuracy.

Under the condition that the range Q has been determined, the size of the flowmeter diameter D can be determined based on the range of flow velocity V mentioned above, and its value can be calculated by the following formula:

Q=π*3600D²V/4

Q: Flow rate (m ³/h) D: Inner diameter of pipeline V: Flow velocity (m/s)

The range Q of explosion-proof electromagnetic flowmeter should be greater than the expected maximum flow value, while the normal flow value should be slightly greater than 50% of the flowmeter's full range scale.

SKLD series electromagnetic flowmeter reference flow range