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Anhui Tiankang (Group) Co., Ltd
Sanitary electromagnetic flowmeter
NegotiableUpdate on 05/06
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Overview
The intelligent sanitary electromagnetic flowmeter adopts single-chip embedded technology to achieve digital excitation, and adopts CAN fieldbus on the electromagnetic flowmeter, which has reached the domestic level of technology. In addition to measuring the flow rate of general conductive liquids, it can also measure the volumetric flow rate of liquid-solid two-phase flow, high viscosity liquid flow, and salt, strong acid, and strong alkali liquids.
Product Details
1、 Instrument Overview:
intelligenceSanitary electromagnetic flowmeterIt adopts embedded microcontroller technology to achieve digital excitation, and at the same time, CAN fieldbus is used on the electromagnetic flowmeter, which has reached the domestic level of technology. In addition to measuring the flow rate of general conductive liquids, it can also measure the volumetric flow rate of liquid-solid two-phase flow, high viscosity liquid flow, and salt, strong acid, and strong alkali liquids.
2、 Measurement principle:
intelligenceSanitary electromagnetic flowmeterThe principle is based on Faraday's law of electromagnetic induction. A pair of detection electrodes are installed on the pipe wall perpendicular to the axis of the measuring tube and the magnetic field lines. When the conductive liquid moves along the axis of the measuring tube, it cuts the magnetic field lines and generates an induced potential. This induced potential is detected by the two detection electrodes, and its value is proportional to the flow rate. Its value is E=KBVD, where:
E - Induced potential;
K - coefficient related to magnetic field distribution and axial length;
B - Magnetic induction intensity;
V - average flow velocity of conductive liquid;
D - electrode spacing; (Measuring the inner diameter of the tube)
The sensor uses the induced potential E as a flow signal, which is transmitted to the converter. After amplification, transformation, filtering, and a series of digital processing, the instantaneous and cumulative flow rates are displayed on a backlit dot matrix LCD. The converter has 4-20mA output, alarm output and frequency output, and is equipped with communication interfaces such as RS-485, and supports HART and MODBUS protocols.
3、 Applicable occasions:
In the hygiene industries such as food and medicine, the process of sanitary electromagnetic flow meters often requires regular use of high-temperature steam for cleaning and disinfection, and there should be no residual medium at the pipeline joints, including the flow meter sensor, to prevent bacterial growth. Therefore, the connection between sanitary industry pipelines and flow meters generally adopts a quick connector form, namely a clamp type structure. Widely used in industries such as chemical, environmental protection, metallurgy, food, medicine, papermaking, water supply and drainage.
4、 Structural form:
1. Sensor:
The sensor mainly consists of a measuring conduit, measuring electrodes, excitation coils, iron cores, magnetic yokes, and a housing.
a、 Measurement catheter: composed of stainless steel catheter, lining, and connecting flange, it is a carrier for measuring the on-site working conditions of the measured liquid.
b、 Measurement electrode: a pair of electrodes installed on the inner wall of the measurement catheter, perpendicular to the axial flow direction, to generate signals for the measured liquid.
c、 Excitation coil: The upper and lower excitation coils that generate a magnetic field inside the measuring conduit.
d、 Iron core and magnetic yoke: Introduce the magnetic field generated by the excitation coil into the liquid and form a magnetic circuit.
e、 Shell: Instrument outer packaging.
2. Converter:
It is an intelligent secondary meter that amplifies and processes the flow signal. After being operated by a microcontroller, it can display the flow rate, cumulative measurement, and output signals such as pulses and analog currents for measuring or controlling fluid flow.
3. Product assembly form:
It is divided into two forms: one-piece and split type.
a、 Integrated: The sensor and converter are installed together.
b、 Split type: Sensors and converters are installed separately, forming a flow metering system through connecting cables.
5、 Performance characteristics:
1. The use of new sanitary lining materials prevents the accumulation of residual measuring media in the measuring tube.
2. The measuring tube has unobstructed AI moving parts, no pressure loss, and low requirements for straight pipe sections.
3. The sensor adopts a new generation of high-quality lining technology and uses a special mirror polished PFA lining.
4. The intelligent converter can simultaneously display measurement data such as volumetric flow rate percentage, instantaneous flow rate, and cumulative flow rate.
5. Adopting a quick connection scheme, the electromagnetic flowmeter is easy to disassemble, maintain, and clean. The intelligent converter adopts a LCD backlit LED display, which can read clearly even in strong light or at night.
6. By using infrared touch buttons to set parameters, it is possible to safely set them without opening the cover of the converter in harsh environments.
7. The converter has functions such as self diagnostic alarm, empty load detection alarm, flow upper and lower limit alarm, and two pole flow value alarm output.
8. Adopting a 16 bit embedded microprocessor for signal processing, it has the characteristics of high integration, fast operation speed, high calculation accuracy, fully digital signal processing, strong anti-interference ability, and reliable measurement.
9. High definition backlit LCD display, fully Chinese menu operation, easy to use, simple to operate, easy to learn and understand.
10 has digital communication signal outputs such as RS485, RS232, Hart, and Modbus.
6、 Technical indicators:
1. nominal diameter: DN10-DN300mm;
2 Accuracy: ± 0.5% of the displayed value, optional ± 0.3% or ± 0.2% of the displayed value;
3. Medium temperature: Split type -10 ℃ to+180 ℃; Integrated -10 ℃ to+80 ℃;
4. Environmental temperature: -25 ℃ to+60 ℃;
5. Dielectric conductivity: greater than 20 μ s/cm;
6 衬里： PTFA；
7 electrode materials: including molybdenum stainless steel, Hastelloy B, Hastelloy C, titanium, tantalum, platinum, iridium alloys;
8 electrode forms: three electrode structure, two electrode structure, detachable electrode structure;
Installation: integrated or split type;
10 shell protection level: Sensor IP65, IP68 optional (IP65: dust tight, anti spray, IP68: dust tight, can work underwater for a long time). ）Converter IP67 (IP67: dust tight, can be immersed in water for a short period of time);
Explosion proof mark: The explosion-proof grade of the explosion-proof sensor is ExmdIIBT4.
7、 Advantages of flow meters:
1. The sensor is the most important component and has undergone rigorous real flow testing to ensure the measurement accuracy of the product.
2. The signal electrode is subjected to electrostatic shielding treatment to ensure that small signals are not interfered by the coil and to guarantee measurement accuracy at low flow rates.
3. The coil is isolated from the outside world to ensure its long-term insulation strength, which in turn guarantees the long-term measurement accuracy of the sensor.
4. All welding processes of the sensor are carried out using argon arc welding technology, which, although costly, ensures the reliability of welding (welding is the most important production process of the sensor), especially the last welding process after installing the coil. Using argon arc welding technology can ensure that the installed coil is not damaged.
5. By adopting a grounding electrode structure, a balanced electrode plane is formed to ensure that the entire process of measuring the average speed is limited within the balanced electrode plane, which can effectively eliminate electrical noise interference and provide accurate measurement results.
6. Adopting customized double-layer shielded cables.
7. Programmable low-frequency rectangular wave excitation improves the stability of flow measurement and reduces power loss.
8. Special medium measurement (such as slurry) uses high-frequency excitation to eliminate clutter interference.
9. Adopting a 16 bit embedded microprocessor, it has fast computing speed and high accuracy.
10. All digital processing, strong anti-interference ability, reliable measurement, and high accuracy.
11. Ultra low EMI switching power supply, suitable for a wide range of power supply voltage changes, with good EMC resistance performance.
12. Complete all functional designs with a single circuit board, using SMD devices and surface mount SMT technology, resulting in high circuit reliability.
13. High definition backlit Chinese LCD display, displaying cumulative flow rate, instantaneous flow rate, flow percentage, etc.
14. Menu operation, easy to use, simple to operate, easy to learn and understand.
15. It has self checking and self diagnostic functions, and is displayed on the screen.
16. DuTe's lightning protection design.
For many years, Tiankang Group has been dedicated to the research and development, production, quality assurance, and after-sales service of various instruments and meters. If you have any purchasing needs for products such as temperature, pressure, liquid level, material level, and flow rate, please feel free to call us. We will serve you wholeheartedly!
