Flow
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Electromagnetic Flow Meter
Description
MEFM100 Series Intelligent Electromagnetic Flow Meter conducts measurement based on the principle of the Faraday's Electromagnetic Induction Law.
When conductive liquid flows in a magnetic field and incises the magnetic flux. Induced electromotive force E will be generated in the conductor, as flow.
Principle
When measuring flow rate, the conductive liquid flows as a velocity of V perpendiculary through a magnetic field, which inducts a voltage that is direct proportional to the average velocity.
The inducted voltage signal is measured on two or more poles immediately contacted with the liquid, sent to a converter through cable, and then intelligentized before it is transferred to and displayed in a LCD or converted into 4~20 mA or 0~1 KHz output.
E = k*B*D* V , Where
k : Instrument constant
B: Magenetic induction density
V: Average velocity in the cross section of a measured pipe
D: Inner diameter of a measured pipe.
Feature and Application
- High Accuracy : ± 0.3%, High Repeatability : ± 0.15%
- Cost Effective Products, High Quality Performance
- Fluid Measuring Velocity Range : 0.3 ~ 10 m/s
- Wide Application for Conductive Liquid ( > 5 µs )
- Shorter Straight Pipe Run : 5D for Up-Stream, 2D for Down-Stream
- Wide Turndown Ratio : 100 to 1
- Ingress Protection IP68 ( DN15~DN1200 ) , Size Max DN3000
- High Intelligence : Back-lit LCD , Menu Driven Programming
- SMT Technical : Intelligence Self-Detect, Self-Diagnoses, Many Alarms
- Low Power Consumption, Zero Stability, Long, Long Term Repeatability
- Multiple-Signal : 4~20 mA, 0~10 mA, Pulse, RS485, HART
- Explosion-Proof Ex d(ia) IIC T4
- Voltage Vibration Adaptability by Power Supply System
- Simple Installation, Easy Maintenance, No Moving Parts
Technical Specification
- Accuracy : ± 0.3%, ± 0.5% ± 1.0%
- Repeatability : ± 0.15%, ± 0.25% ± 0.5%
- Ambient Temperature : Sensor ( Separate Type ) : -20°C~ +70°C
- Converter : -20°C ~ + 50°C
- Humidity : 5% ~ 95% RH ( No Frost )
- Vibration Frequency : 55 Hz z
- Amplitude : 0.55 mm
- Ambient Magnetic Field : ≤ 400 A/m
- Fluid Temperature : Integral Type ≤+80 °C
- Separate Type ( Rubber Lining ) : ≤+80 °C, ( PTFE Lining ) : ≤+120 °C
- Nominal Pressure : 0.6 Mpa ~ 32.0 Mpa
- Liquid Conductivity : > 5 µs
- Power Supply : DC 24 V ±5% or 100~240 VAC 47~63 Hz
- Enclosure : IP68 ( For separate type with synthetic rubber lining only )
- Output Signal : 4~20 mA / 0~10 mA, Standard Pulse Output
- Communication : RS485 Computer Interface and HART Protocol
- Alarm Output : Alive
- Electrode: Stainless Steel, Hastelloy, Titanum, Tantalum, Tungsten, Platinum
- Lining Material : PTFE, Synthetic Rubber
- Flange Material : Cast Steel and Stainless Steel
- Measuring Tube : Stainless Steel
- 측Explosion Grade : Ex d (ia) IIC T4
- Flange Standard, Any Flange Standard can be custom-made.
Norminal Flow Range and Pipe Size Selection
| Size (mm) |
Flow Range ( m³/h ) | Size (mm) | Flow Range ( m³/h ) | ||
|---|---|---|---|---|---|
| Velocity Range | Velocity Range | Velocity Range | Velocity Range | ||
| 0.3 ~ 1.0 m/s | 1.0 ~ 10 m/s | 0.3 ~ 1.0 m/s | 1.0 ~ 10 m/s | ||
| 15 | 0.19~0.64 | 0.64~6.4 | 400 | 136~452 | 452~4520 |
| 20 | 0.34~1.34 | 1.13~11.3 | 450 | 172~572 | 572~5720 |
| 25 | 0.53~1.77 | 1.77~17.7 | 500 | 212~707 | 707~7070 |
| 32 | 0.87~2.89 | 2.89~28.9 | 600 | 306~1020 | 1020~10200 |
| 40 | 1.35~4.50 | 4.50~45.0 | 700 | 416~1385 | 1385~13850 |
| 50 | 2.13~7.10 | 7.10~71.0 | 800 | 543~1810 | 1810~18100 |
| 65 | 3.57~11.9 | 11.9~119 | 900 | 687~2290 | 2290~22900 |
| 80 | 5.43~18.1 | 18.1~181 | 1000 | 849~2830 | 2830~28300 |
| 100 | 8.49~28.3 | 28.3~283 | 1200 | 1221~4070 | 4070~40700 |
| 125 | 13.3~44.2 | 44.2~442 | 1400 | 1662~5540 | 5540~55400 |
| 150 | 19.1~63.6 | 63.6~636 | 1600 | 2172~7240 | 7240~72400 |
| 200 | 33.9~113 | 113~1130 | 1800 | 2748~9160 | 9160~91600 |
| 250 | 53.1~177 | 177~1770 | 2000 | 3393~11310 | 11310~113100 |
| 300 | 76.2~254 | 254~2540 | 2200 | 4100~13680 | 13680~136800 |
| 350 | 104~346 | 346~3460 | 2400 | 4480~16280 | 16280~162800 |
첨부파일
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