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2019-07-16 09:18
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Company Profile
Guangzhou SISEN Automation Control Equipment Co., Ltd.By certification [File Integrity]
Contact:sisen(Mr.)
Email:
Telephone:
Phone:
Area:Beijing
Address:Beijing
Website:http://www.sisenchina.com/ http://sisen.wxtangjin.com/
SISEN 220V electromagnetic flowmeters are widely used to measure volume flow of conductive liquids and liquid-solid two-phase fluids. The measurement principle of electromagnetic flowmeter is based on Faraday's law of electromagnetic induction. In the right figure picture, the two electromagnetic coils on upper and lower ends generate a constant or alternating magnetic field. When theconductive medium flows through the electromagnetic flux and cut the magnetic induction line, an induced electromotiveforce will be generated and detected by two measuring electrodes. The magnitude of induced electromotive force is proportional to the velocity of conductive medium, magnetic induction intensity of magnetic field and conductor width(flowmeter measuring tube diameter), then it will come to the medium flow by calculation.
The equation of Faraday's Law of induced electromotive force:
E=KBDv
Where:E=induced electromotive force; D=measuring tube diameter;B=Magnetic FieldStrength;V=Velocity of Process Fluid(m/s); K=Proportionality Constant(It is related to magnetic field distribution and axial length.)
Working power supply
·110/220V(AC): Applicable to AC power supply(common);
·24V(DC): Being required for some special conditions such as anti-Explosion requirement;
Output signals
·4-20mA output:suitable for long-distance analog signal transmission; ·Frequency/pulse output:used for meter calibration and accumulative flow output;
·RS485 communication:It can support networking of multiple electromagnetic flowmeters and long-distance data transmission; Users need to select output signals according to actual conditions and supporting equipment.
Selection of grounding ring
· Grounding ring is used to ground the measured medium to improve the stability of the electromagnetic flowmeter measurement. Because the grounding ring needs to be in contact with the measured medium, there is a possibility of corrosion and wear of grounding ring, which needs to be replaced periodically.
· Instead of using grounding ring, FLDC series electromagnetic flowmeter has adopted grounding electrode to guarantee long-term stability of grounding and high accuracy. If the stray current is too large to guarantee the normal measurement of the electromagnetic flowmeter, such as the leakage current of the electrolytic cell along the electrolyte,a grounding ring would be recommended to be used.
Some small-caliber electromagnetic flowmeters have only two electrodes, and users can choose double grounding rings according to site requirements.
· When installing the grounding ring, the grounding ring needs to be put on the right position to avoid affecting the flow field of the measured medium.
Technical Parameters | ||||
Executive standard |
JB/T9248-1999 |
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Measured medium |
Conducting liquid and slurry |
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Type |
Piping Type electromagnetic flowmeter |
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Type structure |
Integrated type,Split type |
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Nominal diameter(mm) |
6,10,15,20,25,32,40,50,65,80,100, 125,150,200,250,300,350,400,500.600,700,800,900,1000,1200,1400,1600,1800,2000 |
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Nominal pressure |
DN6-DN80 |
DN100~DN150 |
DN200-DN1000 |
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≤4.0MPa |
≤1.6MPa |
≤1.0MPa |
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Special pressure;can be customized Velocity range | ||||
Velocity range |
0-10m/s Can be set |
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Medium conductivity |
25u5/cm,Actual conductivity 250uS/cm |
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Accuracy |
±0.2%,±0.5% |
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Ambient temperature |
-20-50℃ |
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Highest medium temperature |
CR chloroprene rubber liner(CR) |
0-65℃ |
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Polyurethane(PU) |
0-65℃ |
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Polytetrafluoroethylene(PTFE) |
-25℃-+140℃ |
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Fluorinated ethylene propylene |
-25℃-+120℃ |
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Perfluoroalkoxy(PFA) |
-25℃--180℃ |
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Material of electrodes |
3161,Hastelloy B/C,Tantalum(Ta),Titanium(Ti),Platinum(Pt) |
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Form of electrodes |
Stationary type,scraper type,dismountable type |
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Number of electrodes |
Standard 2 electrodes,should be configuration according to caliber |
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Flange standard |
GB9119(Other standard can be customized) |
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Flange material |
carbon steel(standard),stainless steel(optional) |
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Grounding ring material |
DN15-DN1010:1Cr1SNi9Ti,stainless steel,etc. |
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Housing matcrial |
Carbon steel(stardard),stainless steel(optional) |
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Supply power |
220VAC:24VDC |
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Output signal |
4-20mA;Pulse,Frequency;RS485 |
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Digital communication |
RS-485,HART |
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Cable entry size |
M20x1.5(Standardnylon waterproof connector.optionalexplosion-proofmetal connector) |
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Level of protection |
Split type convertor |
IP65 |
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Split type sensor |
IP65-IP68 |
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integrated type convertor |
IP65 |
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Wiring length(split type) |
Standard 10m.The distance between coverter and sensor is generally no more than 30m. |
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Explosive-proof grade |
Exd II CT3-6 |
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Flow direction |
Forward and reverse |
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Constant current load |
≤750 Ω |
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Storage temperature |
-40-60℃ |
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Relative humidity |
5-95% |
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Alarm setting(normally open) |
Empty pipe,excitation,upper and lower limit |
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http://www.sisenchina.com/