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Electromagnetic flowmeter power
Electromagnetic flowmeter power, electromagnetic flowmeter is the use of Faraday law of electromagnetic induction to make a measurement of the volume flow of conductive liquid dashboard.At the beginning of the age of 50 electromagnetic flowmeter (EMF) to maintain the industrial development of the use of the late 1970s surge keying high-frequency rectangular frame wave excitation method, slowly replaced by the early use of power frequency ac excitation method, instrument functions have a great development, to get more common use.
In recent years, the trend has been rapid, with world production estimated at around 200,000 vehicles in 2005.At present, large size electromagnetic flowmeter is more used in water supply and drainage engineering, medium and small diameter is often found in heterogeneous double same fluid mechanics or high specification site.For example, the measurement of pulp and black liquor in papermaking industry, pulp in nonferrous metallurgical industry, coal pulp in coal washing plant, strong corrosion fluid in organic chemical industry, and control and leakage of cooling water in blast furnace of iron and steel industry, the measurement and control of total flow in hydraulic transportation of coal in long distance pipeline.The diameter, micro-size electromagnetic flowmeter is commonly used in the pharmaceutical industry, food industry, biotechnology and other areas with health regulations.
Performance parameters of electromagnetic flowmeter
Nominal pipe diameter series DN (mm)
Tube type tetrafluoride lining: 10, 15, 20, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600
Tube rubber lining: 40, 50, 65, 80, 100, 125, 150, 200, 300, 350, 400, 500, 600, 800, 1000, 1200.
Flow direction: positive and negative net flow.Range ratio: 150:1. Repeatability deviation: ±0.1% of the accurate measurement value
Accuracy level: 0.5, 1.0 (pipeline type)
Temperature of substance measured: general rubber lining: -20?+ 60 ℃
High temperature rubber lining: -20?+ 90 ℃
Teflon lining: -30?+ 100 ℃
High temperature tetrafluoride liner: -30?+ 180 ℃.
Rated pressure: duct type: DN6?DN80 acuities were 1.6 Mpa, DN100?DN250 acuities were 1.0 Mpa, 12?48 ") or less 0.6 Mpa.
Flow measurement category: flow measurement category matching flow velocity category is 0.1?15 m/s
Conductivity category: measured physical conductivity ≥5us/cm (integral), mostly water-based materials with conductivity of 200?Electromagnetic flowmeter can be used to measure the total flow within the range of 800 ° s/cm.
Electricity flow output: 0 to 10 ma, load resistance to 0-1.5 k Ω;4?20 ma, load resistance of 0-750 - k Ω
Digital frequency output: the output frequency limit can be set within 1-5000hz with optically isolated transistor collector lead dual output.External power supply ≤35V, zui large current of collector junction is 250mA when on and off.
Power supply switching power supply: 85-265v, 45-63hz.
Pipe type: upstream and downstream ≥5DN, middle and downstream ≥2DN.
Interface mode: flange connection shall be used between flow meter and pipe through, and the flange connection specification shall meet the requirements of GB11988.
Explosion-proof type label: mdIIBT4
Operating temperature: -25-60℃
Air humidity: 5%-95%
Total power consumption: less than 20 watts.
The flow meter can meet the needs of most markets, including water, oil, food, lubricating oil, chemistry, cosmetics, ink, pharmaceutical, coating, petroleum, automobile, glue, polyurethane, electrolyte and additives.
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