www. otech.com.sg EFS801 ELECTROMAGNETIC FLOWMETER 1
www. otech.com.sg EFS801 - CFT181/RFT201 ELECTROMAGNETIC FLOWMETER Accurate, Reliable and Stable Flow Measurement. Measuring Principle The measuring principle of the electromagnetic flowmeter (Magmeter) is based upon the Faraday s Law of electromagnetic induction; whereby a voltage is induced by an electrical conductor passing through a magnetic eld. The following equation is applicable to the induced voltage: U = kbvd where U k B V D Induced voltage Instrument constant Magnetic eld strength Velocity of the conductor Conductor width Applications In electromagnetic flowmeter, the medium acts as the electrical conductor when owing through the meter tube, the induced voltage is proportional to the average ow velocity (the faster the ow rate, the higher the voltage). The induced voltage is picked up by a pair of electrodes (mounted in the meter tube) and transmitted to a ow transmitter to produce various standardized output signals. Using the pipe cross-sectional area, the ow volume is calculated by the transmitter. isolv electromagnetic flowmeter can be used for precise flow measurement of all electrically conductive liquids - sludges, slurries, sewage, milk, water. The only pre-requisite being that the minimum conductivity of the medium is greater than 5μS/cm. Temperature, viscosity, density has no in uence on the measurement. With isolated inert linings and electrodes, Flow measurement of very corrosive liquids (eg: acids, caustic and corrosive chemicals) is not an issue. isolv electromagnetic owmeter has many applications across many industries environment. Chemical Water/wastewater Pulp and paper Marine & Offshore Pharmaceutical Building automation (HVAC) Food and beverage 2
www.flotech.com.sg EFS 801/CFT181 Integral Flow Transmitter RFT201 Remote Flow Transmitter EFS801 Flowhead Specification Performance Accuracy +/- 0.2% to 0.5% Repeatability +/- 0.1% or +/- 0.25% Fluid Conductivity > 5μS/cm Fluid Temperature: -25 C to 80 C (Standard) -25 C to 140 C - Depending On Liner Material & Coil Insulation Class Ambient Temperature -25 C to 0 C Sensor Model EFS 801 Size DN3 - DN2400 Type Flange DIN 2501/ ANSI/ JIS Pressure Rating Refer To Page 5 &. Higher Pressure Rating Available on Request Tube Material SS304 Liner Material (Wetted Parts) Neoprene Rubber / PTFE / PFA Electrode Material(Wetted Parts) SS31L/ Hastelloy C/ Tantalum/ Titanium/ Platinum-Iridium Alloy Flange Material Carbon Steel. Other Material Available on Request Housing Protection Class Carbon Steel with Epoxy Painting IP7 (Standard) IP8 (Optional) Transmitter Housing Type Remote Integral Model No RFT201 CFT181 Power Supply 95-25 VAC, 11-40 VDC Output Signal 4-20mA and Pulse Communications HART/ Profibus-PA/ RS485 Housing Cast Aluminum with Painting Protection Class IP5 (Standard) / IP7 (Optional) Cable Length 10m (standard), available up to 95m NA Cable Entry M20 X 1.5 (Std) / NPT ½ / G½ Note: Available for Explosion Proof version upon request 3
www. otech.com.sg Flowmeter Sizing and Selection Proper selection, sizing and installation of electromagnetic owmeter will ensure trouble free operation and cost saving. The following information will be required. 1) Type of liquid consider suitability of liner and electrodes 2) Conductivity = 5μS/cm 3) Maximum / minimum temperature 4) Maximum / minimum pressure. Negative pressure? 5) Maximum / minimum ow rates ) Solids content Flow Table Meter Size Qmin (m3/h) Qmax (m3/h) Meter Size Qmin (m3/h) Qmax (m3/h) 3 0.013 0.254 350 173.18 3,43.1 10 0.14 2.83 400 22.19 4,523.89 15 0.32.3 450 28.28 5,725.55 20 0.57 11.31 500 353.43 7,08.58 25 0.88 17.7 00 508.94 10,178.7 32 1.45 28.95 700 92.72 13,854.42 40 2.2 45.24 800 904.78 18,095.57 50 3.53 70.9 900 1,145.11 22,902.21 5 5.97 119.4 1000 1,413.72 28,274.33 80 9.05 180.9 1 2,035.75 40,715.04 100 14.14 282.74 1400 2,770.88 55,417.9 125 22.09 441.79 100 3,19.11 72,382.29 150 31.81 3.17 1800 4,580.44 91,08.84 5.55 1,130.97 0 5,54.87 113,097.34 250 88.3 1,77.15 2,842.39 13,847.78 300 127.23 2,544.9 2400 8,143.01 12,80.1 4
5 www. otech.com.sg Dimension - Sensor Size (mm) 3 ~ 15 20 25 32 40 50 5 80 100 125 150 250 300 350 400 450 500 00 L 250 250 300 350 450 500 550 00 00 00 00 W 128 128 128 128 128 15 185 220 250 285 340 405 40 52 59 40 70 810 H 127 137 147 155 15 187 202 223 249 278 303 358 418 48 50 14 5 710 810 PN10 3.5 4 5 7 7.5 9 11 14 19 24 32 41 8 89 97 122 11 180 241 PN1 3.5 4 5 7 7.5 9 11 14 19 24 32 41 8 89 97 122 11 180 241 PN25 3.5 4 5 7 8 9.5 12 15 20 25 35 4 73 97 124 157 243 285 PN40 4 4.5 5.5 8 8.5 10 14 19 24 30 42 5.5 85 113 - - - - - Dimension (mm) Weight (kg) Note: Dimensions are based on DIN2501 standards.
www. otech.com.sg Dimension - Sensor Size Pressure Rating Dimension (mm) Weight (mm) (PN) L W H (kg) 700 700 895 995 420 800 800 1015 1115 541 900 900 1115 1215 8 1000 1000 1230 1350 858 1 1 1405 1505 990 1400 1400 130 1730 132 100 100 1830 1930 1754 1800 1800 2045 2145 1890 0 0 22 235 2105 2 2 2475 234 3210 2400 2400 285 254 3910 Dimensions are based on DIN2501 standards.
www. otech.com.sg Dimension - Transmitter RFT201 Remote Transmitter CFT181 Integral Transmitter 7
www. otech.com.sg Primary ow sensor in metal pipe Primary flow sensor in pipe runs with cathodic protection Primary ow sensor must be electrically isolated from the pipe. Protective rings for good grounding are compulsory. 5 1) Measuring ground 2) Grounding wire 10mm 2 Cu (AWG 7) Primary ow sensor in plastic pipe or in metal pipe with insulating coating / lining / painting 1) Measuring ground 2) Grounding wire 10mm 2 Cu (AWG 7) 3) Grounding rings 4) Screw bolts (insulated) 5) Connecting wire 10mm 2 Cu (AWG 7) 1) Measuring ground 2) Grounding wire 10mm 2 Cu (AWG 7) 3) Grounding rings Installation Location and position as required, but electrode axis ( x...x ) must be approximately horizontal. Pipe must be completely lled at all times. Flow direction - Avoid top / bottom Ensure there is suf cient clearance for installation and maintenance work. Straight inlet run minimum of 5xDN and outlet 2xDN (DN= meter size) measured from the electrode axis. Support the pipeline on both sides of the owmeter to minimise vibrations. Do not install owmeter in vicinity of strong electromagnetic elds. Example: High-tension electrical cables Install protective rings for plastic pipes and internally coated metal pipelines for proper grounding. 8
www.flotech.com.sg Some Typical Installations A & B - Preferred locations. (Pipe is fully filled!) C - Highest point of pipe run (Air bubbles accumulate in measuring tube causing incorrect or unstable measurements) D - Top/bottom flow direction to drain does not create a fully filled pipe condition causing unstable or inaccurate reading. Install in slightly ascending pipe section. If not possible, ensure adequate velocity to prevent air, gas or vapor from concentrating in the flow sensor. Install flow sensor in lower section of pipe. Install air valve downstream of flowmeter. Negative pressure (Vacuum) may damage the liner. Always install control and shutoff valves downstream of flowmeter to avoid flow profile distortion or possible negative pressure (Vacuum) Never install flow sensor on pump suction side (Vacuum!). May cause damage to the liner. Install flowmeter in bypass for heavily contaminated fluids. A) Flowmeter B) Flushing and cleaning without interrupting system operation 9
www.flotech.som.sg Ordering Information (Example) E801 Model E801 - EFS801 R201 Version C181 - R201 - Compact (CFT181) Remote (RFT201) P Liner H - Neoprene Rubber (Std) T - PTFE (Applicable to Max. Temp. < 100 C) P - PFA (Applicable to Max. Temp. < 140 C) 15 Meter Size 15 - ½" DN15 20 - ¾" DN20 25-1" DN25 32-1¼" DN32 40-1½" DN40 50-2" DN50 5-2½" DN5 80-3" DN80 1H - 4" DN100 1Q - 5" DN125 1F - " DN150 2H - 8" DN 2F - 10" DN250 3H - 12" DN300 3F - 14 DN350 4H - 1 DN400 4F - 18 DN450 5H - 20 DN500 H - 24 DN00 7H - 28 DN700 8H - 32 DN800 9H - 3 DN900 1T - 40 DN1000 12-48 DN1 14-5 DN1400 1-4 DN100 18-72 DN1800 2T - 80 DN0 22-88 DN2 24-9 DN2400 S B 3 1 0 Electrode S - SS 31 (Std) H - Hastelloy C M - Titanium T - Tantalum P - Platinum- Iridium Alloy Pressure Rating A - PN 10 B - PN 1 C - PN 25 D - PN40 E - ANSI 150 LBS F - ANSI 300 LBS H - JIS10K Flange Material 0 - Carbon Steel (Std) 3 - SS304 Accuracy 0 - ±0.5% (Std) 1 - ±0.2% Earthing Rings 0 - None C - Ground Ring (SS31) 10
www.flotech.som.sg Ordering Information (Example) 15 Earthing Rings Size [Selection based on Meter Size] 15 - ½" DN15 7H - 28 DN700 20 - ¾" DN20 8H - 32 DN800 25-1" DN25 9H - 3 DN900 32-1¼" DN32 1T - 40 DN1000 40-1½" DN40 12-48 DN1 50-2" DN50 14-5 DN1400 5-2½" DN5 1-4 DN100 80-3" DN80 18-72 DN1800 1H - 4" DN100 2T - 80 DN0 1Q - 5" DN125 22-88 DN2 1F - " DN150 24-9 DN2400 2H - 8" DN 2F - 10" DN250 3H - 12" DN300 3F - 14 DN350 4H - 1 DN400 4F - 18 DN450 5H - 20 DN500 H - 24 DN00 1 0 0 01 2 C 0 Protection Class [Sensor+ Trensmitter] 1 - IP7 Sensor + IP5 Transmitter (Std) 2 - IP7 Sensor + IP7 Transmitter 3 - IP8 Sensor + IP7 Transmitter Temperature Range 0 - Standard Temperature <= 80 C (Std) H - High Temperature -25 to 140 C [for remote version (RFT201) only] Power Supply 0 - High Voltage- 95-25 VAC (Std) K - Low Voltage- 11-40 VDC In/ Output Options 0 - Current Output + Pulse Output (Std) 01 - Double Current Output 02 - RS485 03 - HART protocol 04 - Profibus PA Cable Gland 0 - Converter Housing with Threads for Cable Connector M 20 x 1.5 (Std) 1 - Converter Housing with Threads for Cable Connector NPT 1/2" 2 - Converter Housing with Threads for Cable Connector G 1/2" Cable 0 - None [Compact Transmitter] C - Cable [Remote Transmitter] (Max. Length up to 50m) (10m - Std) Special Application 0 - None LN - With Long Neck Note: 1) High temperature application applicable to remote version only 2) Long neck application applicable for compact type Ordering Code: (Example) E801 R201 P 15 S B 3 1 0 15 1 0 0 01 2 C 0 11
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