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Industry Information
Explosion-proof electromagnetic flowmeter overcomes the shortcomings of sine wave magnetic field
2012-2-24 8:43:18

的详细资料: Details of HD-LD series explosion-proof electromagnetic flowmeter :

Features:
1. The measurement is not affected by changes in fluid density, viscosity, temperature, pressure and conductivity;
2. There are no obstructing flow parts in the measuring tube, no pressure loss, and the requirements for straight pipe sections are low;
3. The nominal diameter of the series is DN15 ~ DN3000. Multiple choices for sensor liner and electrode materials;
4. The converter uses a novel excitation method, low power consumption, stable zero point and high accuracy. Flow range can reach 1500: 1;
5. The converter can be integrated or separated with the sensor;
6. The converter adopts a 16-bit high-performance microprocessor, 2x16 LCD display, convenient parameter setting and reliable programming;
7. The flow meter is a two-way measurement system with three totalizers: forward total, reverse total, and difference total; it can be displayed. Zhuang, anti-flow, and has a variety of outputs: electricity
Stream, pulse, digital communication, HART;
8. The converter uses surface-mount technology SMT, which has self-checking and self-diagnostic functions;

采用世界最新技术。 HD-LD series explosion-proof electromagnetic flowmeter uses the latest technology in the world. The use of constant-current low-frequency three-value rectangular wave or double-frequency rectangular wave excitation not only has the advantages of a rectangular wave magnetic field, but also overcomes the shortcomings of a sine wave magnetic field; it can also eliminate power supply voltage fluctuations, power supply frequency changes, and excitation coil impedance changes Error; and has excellent zero stability and is not affected by the interference of fluid noise. So it has the characteristics of high stability and high reliability. The measurement principle of the 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. The converter can be combined with the sensor and called an integrated electromagnetic flowmeter. The converter is installed within 30 meters or 100 meters from the sensor, and the two are connected by a shielded cable called a separate electromagnetic flowmeter. The main components of the explosion-proof electromagnetic flowmeter sensor are: measuring tube, electrode, excitation coil, iron core and yoke housing. Explosion-proof electromagnetic flow meters are mainly used to measure the volumetric flow of conductive liquids and slurries in closed pipes. Such as water, sewage, mud, pulp, various acids, alkalis, salt solutions, food slurry, etc., explosion-proof electromagnetic flowmeters are widely used in petroleum, chemical, metallurgy, textile, food, pharmaceutical, papermaking and other industries, as well as environmental protection, municipal management, Water construction and other fields.

主要技术参数●公称通径系列DN(mm) Main technical parameters of explosion-proof electromagnetic flowmeterNominal diameter series DN (mm)
Pipeline PTFE lining:
10,15,20,25,32,40,50,65,80,100,125
150, 200, 250, 300, 350, 400. 450, 500, 600
Duct rubber lining:
40, 50, 65, 80, 100, 125, 150, 200, 300
350, 400, 500, 600, 800, 1000, 1200
Note: special specifications can be customized ● Accuracy grade: pipeline type: 0.5 grade, 1.0 grade ● Temperature of measured medium:
Ordinary rubber lining: -20 ~ + 60 ℃
High temperature rubber lining: -20 ~ + 90 ℃
Teflon lining: -30 ~ + 100 ℃
High temperature vinyl lining: -30 ~ + 180 ℃
● Rated working pressure:
Pipe type: DN10—DN65: ≤2.5Mpa, DN80—DN150: ≤1.6Mpa,
DN200—DN1200: ≤1.0Mpa
● Flow measurement range:
Flow measurement range Convection speed range is 0.3-15m / s
● Conductivity range:
Measured fluid conductivity ≥5μs / cm
Most media with water as its component have an electrical conductivity in the range of 200-800μs / cm, and can choose electromagnetic flux;
● Output current and load resistance:
4 ~ 20mA fully isolated load resistance <750 ohm pulse frequency 0-1KHZ photoelectric isolation OCT external power ≤35V
Maximum collector current during turn-on is 25mA
● Electrode material:
Molybdenum-containing stainless steel, titanium (Ti), tantalum (Ta), Hastelloy (H), platinum (Pt) or other special electrode materials ● Protection level: diving type: IP68, other types IP65
● Power supply:
85 ~ 265V, 45 ~ 63HZ
● Connection method:
The flowmeter and piping are connected by flanges, and the flange connection size should meet the requirements of GB9119-88.
● Anti-riot sign: mdllBT4
● Ambient temperature: -25 ℃ ~ + 60 ℃
● Relative temperature: 5% ~ 95%
● Total power consumption: less than 20W