ELECTROMAGNETIC FLOWMETER

Transcription

1 ELECTROMAGNETIC FLOWMETER ELECTROMAGNETIC FLOWMETER 1

2 EFS800 - CFT180/RFT200 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 field. The following equation is applicable to the induced voltage: U = kbvd where U k B V D Induced voltage Instrument constant Magnetic field strength Velocity of the conductor Conductor width In electromagnetic flowmeter, the medium acts as the electrical conductor when flowing through the meter tube, the induced voltage is proportional to the average flow velocity (the faster the flow 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 flow transmitter to produce various standardized output signals. Using the pipe cross-sectional area, the flow volume is calculated by the transmitter. Applications 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 influence on the measurement. With isolated inert linings and electrodes, Flow measurement of very corrosive liquids (eg: acids, accaustics and corrosive chemicals) is not an issue. isolv electromagnetic flowmeter has many applications across many industries environment. Chemical Water/wastewater Pulp and paper Marine & Offshore Pharmaceutical Building automation (HVAC) Food and beverage ELECTROMAGNETIC FLOWMETER 2

3 Specification EFS 800/CFT180 Integral Performance Accuracy Flow Transmitter +/- 0.3% to 0.5% Repeatability +/- 0.1% Full Scale Range Setting 0.5 m/s to 10 m/s Fluid Conductivity > 5μS/cm Power Consumption <20 VA Fluid Temperature Remote Flow Transmitter RFT200 EFS800 Flowhead -25 o C to 180 o C (Depending On Liner Material & Coil Insulation Class) Ambient Temperature -20 o C to 60 o C Relative Humidity 0-97% Calibration Certificate Wet Calibration 3 Points (Additional Test Points Upon Request) Sensor Model EFS 800 Process Connection Size Type Pressure Rating DN10-DN3800 Flange DIN 2501/ ANSI/JIS Refer To Page 5 & 6. Higher Pressure Rating Available On Request Material Tube SS304 Liner (Wetted Parts) Hard Rubber (Std) / PTFE/ Others On Request Signal Electrode (Wetted Parts) SS316 (Std)/ Hastelloy C/ Tantalum/ Titanium Process - Flange Carbon Steel (Std)/ SS304 (Optional With Price Adder) Housing DN 10 to DN 300: Die-Cast Aluminium With Epoxy Paint DN 350 to DN 3800: Steel With Epoxy Paint Grounding Rings SS304 (Std) / SS316 Flow Direction Bi-directional (Forward / Reverse) Field Coils E class = 130 o C H class = 180 o C Protection Class IP 67 / IP 68 Optional Removable Electrode Construction Available (Upon Request) 3 rd Electrode For None Full Bore Detection Available (Upon Request) Transmitter Housing Type Remote Integral Model No RFT200 CFT180 Power Supply VAC ; VAC / VDC Display 2 x 16 Alpha Numeric Character LCD Outputs Current 4-20mA Pulse <5kHz Frequency D. C. Contact Relay 1 no for Alarm/ Empty Pipe Communications Available On Request: HART/ Profibus DP/ Profibus PA/ Foundation Fieldbus/ RS485 Housing Material Aluminium Alloy Protection Class IP65 Cable Length 10m (Std) Other Length NA Available up to 50m Cable Entry M20 X 1.5 (Std) / NPT ½ / PF ½ *For other requirement, please contact Flotech for availability ELECTROMAGNETIC FLOWMETER 3

4 Flowmeter Sizing and Selection Proper selection, sizing and installation of electromagnetic flowmeter 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 = 5 S/cm 3) Maximum / minimum temperature 4) Maximum / minimum pressure. Negative pressure? 5) Maximum / minimum flow rates 6) Solids content Flow Table Meter Size Qmin (m³/h) Qmax (m³/h) NOTE: For other requirement, please contact Flotech for availability. ELECTROMAGNETIC FLOWMETER 4

5 Dimension Dimensions for integral flow transmitter and flow sensor Size *Pressure Rating **Dimensions (mm) (mm) PN A D D0 n-φx φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ36 * Please request for drawing for dimension of other Pressure Rating. ** Dimensions are based on DIN2501 standards n-φx D0 D A EFS 800 / CFT180 ELECTROMAGNETIC FLOWMETER 5

6 Dimensions for remote flow sensor Size *Pressure Rating **Dimensions (mm) (mm) PN A D D0 n-φx φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ φ36 > Upon Request * Please request for drawing for dimensions of Higher Pressure Rating. ** Dimensions are based on DIN2501 standards. n-φx D0 D A EFS 800 / RFT 200 ELECTROMAGNETIC FLOWMETER 6

7 Grounding the Primary Flow Sensor Primary flow sensor in metal pipe 1) Measuring ground 2) Grounding wire 10mm 2 Cu (AWG 7) Primary flow 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 5 Primary flow sensor in pipe runs with cathodic protection Primary flow sensor must be electrically isolated from the pipe. Protective rings for good grounding are compulsory. 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) Installation Location and position as required, but electrode axis ( x...x ) must be approximately horizontal. Pipe must be completely filled at all times. Flow direction - Avoid top / bottom Ensure there is sufficient 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 flowmeter to minimise vibrations. Do not install flowmeter in vicinity of strong electromagnetic fields. Example: High-tension electrical cables Install protective rings for plastic pipes and internally coated metal pipelines for proper grounding. ELECTROMAGNETIC FLOWMETER 7

8 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 vapour 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. 2 A) Flowmeter B) Flushing and cleaning without interrupting system operation ELECTROMAGNETIC FLOWMETER 8

9 Ordering Information (Example) EFS800 EFS800 CFT18 - Compact Version RFT200 - Remote Version R20 Version C18 - Compact (CFT180) [DN10 - DN1000] R20 - Remote (RFT 200) [DN10 - DN3800] W H Electronic Type XM - XEM Version (Selection meter size btw DN DN3800) [High Temp coil & refer to In/ Output options] XE - XE Version (Selection meter size btw DN10 - DN1000) [High Temp coil & refer to In/Output options] W - WT4300 (Selection meter size btw DN10 - DN1000) [In/Output options 0 and 03 only] Liner H - Hard Rubber (std) [for Meter Size from DN25 to DN3800] (max temp < 90 C) T - PTFE [for Meter Size from DN10- DN900] (max temp < 200 C) 15 Meter Size 10-3/8" (DN10 PN40) 15-1/2" (DN15 PN40) 20-3/4" (DN20 PN40) 25-1" (DN25 PN40) /4" (DN32 PN40) /2" (DN40 PN40) 50-2" (DN50 PN40) /2" (DN65 PN40) 80-3" (DN80 PN40) 1H - 4" (DN100 PN16) 1Q - 5" (DN125 PN16) 1F - 6 (DN150 PN16) 2H - 8 (DN200 PN10) 2F - 10 (DN250 PN10) 3H - 12 (DN300 PN10) 3F - 14 (DN350 PN10) 4H - 16 (DN400 PN10) 4F - 18 (DN450 PN10) 5H - 20 (DN500 PN10) 6H - 24 (DN600 PN10) 7H - 28 (DN700 PN10) 8H - 32 (DN800 PN10) 9H - 36 (DN900 PN10) 1T - 40 (DN1000 PN10) (DN1200 PN6) (DN1400 PN6) (DN1600 PN6) (DN1800 PN6) 2T - 80 (DN2000 PN6) (DN2200 PN2.5) (DN2400 PN2.5) (DN2600 PN2.5) (DN2800 PN2.5) (DN3000 PN2.5) 3Q (DN3200 PN2.5) (DN3400 PN2.5) (DN3600 PN2.5) (DN3800 PN2.5) S G Electrode S - SS 316Ti/ (Std) B - Hastelloy B-2 H - Hastelloy C-4 M - Titanium T - Tantalum Pressure Rating 0 - DIN Standard B -PN 10 C -PN 16 D -PN 25 E -PN 40 G - ANSI 150 Ibs F - ANSI 300 lbs I - ANSI 600 Ibs A - JIS 10K Continue to the next page ELECTROMAGNETIC FLOWMETER 9

10 Ordering Information (Example) 0 C 15 H 0 K Flange Material 0 - Carbon Steel (Std) 3 - SS 304 Earthing Rings 0 - None C - Ground Plate (SS 304) Type 1(Std) X - Others Earthing Rings Size (Selection based on Meter Size) 0 - None 10-3/8" (DN10) 15-1/2" (DN15) 20-3/4" (DN20) 25-1" (DN25) /4" (DN32) /2" (DN40) 50-2" (DN50) /2" (DN65) 80-3" (DN80) 1H - 4" (DN100) 1Q - 5" (DN125) 1F - 6 (DN150) 2H - 8 (DN200) 2F - 10 (DN250) 3H - 12 (DN300) 3F - 14 (DN350) 4H - 16 (DN400) 4F - 18 (DN450) 5H - 20 (DN500) 6H - 24 (DN600) 7H - 28 (DN700) 8H - 32 (DN800) 9H - 36 (DN900) 1T - 40 (DN1000) (DN1200) (DN1400) (DN1600) (DN1800) 2T - 80 (DN2000) Magnetic Coil Temperature Range 0 - Standard Temperature < 130 o C (Std) H - High Temperature < or = 180 o C (For H coil option, meter size must come with PTFE Liner) Protection Class (Primary Sensor Head) 0 - IP IP 68 Power Supply VAC K VAC / VDC Continue to the next page ELECTROMAGNETIC FLOWMETER 10

11 Ordering Information (Example) 06 0 L20 In/ Output Options 0 - Current output + Pulse output active + Contact input + Contact output (WT4300 only) 02 - Current output + Pulse output active + Contact input + Contact output + HART protocol (XE / XEM only) 03 - Current output + Pulse output passive + Contact input + Contact output (WT4300 only) 04 - Current output + Pulse output passive + Contact input + Contact output + HART protocol (XE / XEM only) 05 - Current output + Pulse output passive + Contact output + RS Pulse output passive + Contact output + Profibus DP 14 - Profibus PA Foundation Fieldbus 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 PF 1/2" Cable 0 - None (Compact Transmitter) C - Cable (Remote Transmitter) - 10m (Std) LXX - Other length up to 50m (Specify) XE / XEM only Ordering Code: (Example) EFS800 R20 W H 15 S G 0 C 15 H 0 K 0 0 L20 ELECTROMAGNETIC FLOWMETER 11

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