The QE-LDB series of electromagnetic flowmeters, intelligent electromagnetic flowmeter Overview QE-LDB series electromagnetic flowmeter has its unique advantages, it is widely used in chemical fiber, food, paper, sugar, mining and metallurgy, water supply and drainage, environmental protection, iron and steel, petroleum, pharmaceutical and other industries, used to measure various acids, alkalis, salt solutions, mud, pulp, paper pulp, coal water slurry, corn syrup, fiber pulp, sewage, cooling water, salt water, hydrogen peroxide, beer, wheat juice, various beverages, black liquor and the volume flow of the conductive fluid medium. Second, the constant current excitation of electromagnetic flowmeter characteristics of low-frequency three-valued rectangular wave, from work frequency and the influence of the site various stray interference, the work is very stable and reliable. New technology and the use of non-uniform magnetic field magnetic dance structure, the magnetic field is stable, but also greatly reduced the volume, less weight, the flowmeter has the characteristics of small lightweight. Specialized electronic circuits with ATC automatically reset to zero function. At the scene, according to the users need to be online to modify range. No moving parts, unimpeded flow of parts. The measurement almost no additional pressure loss. The measurement results with the velocity distribution, independent of the physical parameters of the fluid pressure, temperature, density, viscosity, etc.. Easy to use, just plug in the power, after the installation without any other operations, you can output standard signal, easy to non-professionals. QE-LDB electromagnetic flowmeter uses the the contemporary the electromagnetic flowmeter latest technology manufacturing, has the following characteristics: measurement independent of fluid density, viscosity, temperature, pressure and conductivity changes, linear measurement principle to achieve high accuracy measurement; measurement unimpeded flow tube pieces, the pressure loss is extremely small, straight pipe requirements; nominal diameter DN10-DN2200 covering a wide range of liners and electrodes have a variety of options to meet the measurement requirements of a variety of conductive fluid; converter with programmable frequency low-frequency rectangular wave excitation to improve the stability of the flow measurement, power loss, zero stability; converter with 16-bit embedded microprocessor, all-digital processing, computing speed, strong anti-interference ability, reliable measurement, high accuracy, flow measuring range of up to 1500:1; backlit LCD high-definition display, full Chinese menu operation, easy to use, easy to operate, easy to learn; RS485 or RS232 digital communication signal output; conductivity measurement sensor can judge whether ATC; self-test and self-diagnosis function; SMD devices and surface mount (SMT) technology, high reliability circuit; can be used in the explosion-proof occasions. Electromagnetic flowmeter principle QE-LDB series electromagnetic flow meter is based on Faraday's law of electromagnetic induction. Both when the conductive liquid flows through the electromagnetic flowmeter, conductor induced electromotive force, the induced electromotive force with conductive liquid flow rate, magnetic induction, conductor width is proportional to the (flow meter internal diameter). The induced electromotive force is detected by a pair of electrodes on the flowmeter wall. Operation can get traffic E = KBDV E: induced electromotive force K: constant of proportionality (the magnetic field distribution and axial length coefficient) B: magnetic induction D: measuring tube diameter V: average velocity within the cross-section of the measuring tube, the technical parameters ? implementation of standards: JB/T9248-2000 electromagnetic flowmeter? the nominal diameter series DN: (mm) tetrafluoroethane. lining: 10,15,20,25,32,40,50,65,80,100,125,150,200, 250,300,350 ...... 1200 rubber lining : 10,15,20,25,32,40,50,65,80,100,125,150,200,250,300,350 ...... 1600 Note: special specifications can be customized? Accuracy class: 0.5, 1.0? Operating Temperature: Neoprene lining: -20 to +60 ℃; polyurethane lining: -20 ~ +90 ℃ PTFE lining: -30 ~~ +150 ° C? working pressure: DN10-DN65: 2.5Mpa DN80-DN150: 1.6Mpa DN200-DN600: 1.0Mpa? flow measurement range: flow measurement range corresponding to the flow rate range is 0.5 ~ 10m / s? Conductivity: conductivity greater than 20μs/cm? output signal and load resistance: 0 to 10mADC 0 ~~ 1000W; 0 ~~ 1000Hz; less than 10KΩ / 4 ~~ 20mADC, 0 ~ 500Ω; 1 ~ 5V, 0 ~ 5V, not less than 10KΩ? electrode material: 316 stainless steel? Protection class: IP65? Power supply: 220VAC ± 10%, 50Hz ± 5% 24VDC ± 10%? straight pipe Length: upstream of 5DN downstream ≥ 3DN? Connection: flange connection between the flow meter and the piping flange connection size should be consistent with GB9119-88