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perpendicular to both the liquid flow direction and the electromagnetic field direction. The voltage sensed by the electrodes is further processed by the transmitter to give standardised output signal or displayed in appropriate engineering unit. The flux density of the electromagnetic field in a given Flowmeter and the distance between the electrodes are constant. Therefore, the induced voltage is only a function of liquid velocity. E = KxBxvxD where E : Induced voltage K : Flow tube constant B : Magnetic field strength v : Mean flow velocity and D : Electrode spacing Volume flow is calculated by equation 2 Q = vxd xb/4 MagFlow 641 Working Principle Electromagnetic Flowmeters are based on Faraday's Law of Electromagnetic Induction. In an Electromagnetic Flowmeter, the magnetic field is generated by a set of coils. As the conductive liquid passes through the electromagnetic field, an electric voltage is induced in the liquid, which is directly proportional to its velocity. This induced voltage is ExDxB Therefore, Q = KxBx4 The induced voltage is not affected by the physical properties of liquid like temperature, viscosity, pressure, density and conductivity, as long as conductivity of the measured liquid is above minimum threshold level. For reliable measurement, the pipe must be completely full of liquid. The electromagnetic field coil assembly is excited by pulsed DC technique, which eliminates the interfering noise and provides automatic zero correction. MagProbe 645 EcoMag 642 MagBP 644 2
Technical Specifications : Series 64 Parameters Nominal dia (mm) 2 Working pressure (kg/cm ) MagFlow 641 1 to 2 1, 16, 25, 4 EcoMag 642 1 to 15 5 MagBP 644 1 to 1 1, 16, 25, 4 MagProbe 645 > 1 2 Working temperature Integral PTFE - 12 Remote PTFE - 18 C Others - 7 C C Up to 55 C Up to 55 C Up to 12 C Electrode material Sensor lining Display version Measuring tube material Sensor housing material End connection Flange - Standard Measuring range Accuracy % of measured value Repeatability Display Std. Rubber* SS34 Std.* Std. CS* Flange/Wafer/Tri-clamp ANSI 15*.2 to 12 m/sec. Bidirectional ±O.5 (±O.2% consult factory) ±.2% of span 2 line LCD/LED HDPE HDPE Flange ANSI 15*.2 to 12 m/sec. Bidirectional ±1% ±.2% of span 2 line LCD/LED Std. Rubber* SS34 Std.* Std. CS* Flange/Wafer/Tri-clamp ANSI 15*.2 to 12 m/sec. Bidirectional ±1% ±.2% of span 2 line LCD SS316 Std.*.2 to 12 m/sec. Bidirectional ±2% ±.2% of span 2 line LCD/LED Display units Output Std. 4-2 ma* Std. 4-2 ma* Std. 4-2 ma* Power supply 24 V DC or 8-3 V AC 24 V DC or 8-3 V AC Battery powered 5 years battery life 24 V DC or 8-3 V AC Protection class for sensor Std. IP 65 Option IP 68 for flow tube in remote type Std. IP 65 Option IP 68 for flow tube in remote type Std. IP 65 Option IP 68 for flow tube in remote type Std. IP 68 Protection class for transmitter Cable length for remote Std. 1 m Std. 1 m Std. 1 m Std. 1 m Installation Inline flanged type Inline flanged type Inline flanged type Insertion type with use of isolating ball valve assembly on pipeline. * Please refer to order code for options. Electromagnetic Flowmeter Series 64 3
Electromagnetic Flowmeter Components Cable gland Display Transmitter Earthing ring Coil housing Liner (Rubber/PTFE) Flange Minimum - Maximum Flow Table Velocity range -.2 m/sec. for minimum & 12 m/sec. for maximum DN in mm 1 15 2 25 32 4 5 65 8 1 125 15 2 25 3 35 4 45 5 6 7 8 9 1 12 14 16 18 2.6.13.23.35.58.9 1.41 2.39 3.62 5.65 8.84 12.72 22.6 35.2 5.89 69.26 9.46 114.49 141.35 23.54 277.4 365.44 457.98 568.16 814.18 118.18 1447.42 1831.9 2261.6 3 m /hr. LPM LPS USGPM Min. Max. Min. Max. Min. Max. Min. Max. 3.38 7.63 13.56 21.19 34.91 54.28 84.82 143.28 217.8 339.24 53.16 763.32 1356. 2112. 353.16 4155.72 5427.84 6869.64 8481. 12212.52 16622.4 21926.4 27478.8 3489.6 4885.8 6649.8 86845.2 19914. 135696..94 2.12 3.77 5.89 9.65 15.8 23.56 39.82 6.31 94.23 147.24 212.3 376.93 588.96 848.1 1154.36 157.73 198.4 2355.83 3392.4 4618.8 69.65 7633.87 9469.5 13569.6 18471.94 24125.37 389.45 3788.56 56.53 127.21 226.15 353.36 578.96 94.63 1413.49 2389.2 3618.55 5653.99 8834.38 12721.5 22616. 35337.5 5886. 69261.5 9464.2 11453.76 14135.3 23544.4 27784.68 365439. 45832.32 568169.76 814176.12 118316.28 1447522.44 1848566.76 2272833.6.2.4.6.1.16.25.39.66 1.1 1.57 2.45 3.53 6.28 9.82 14.14 19.24 25.13 31.81 39.26 56.54 76.96 11.51 127.23 157.82 227.27 37.88 42.8 513.5 631.34.94 2.11 3.77 5.88 9.65 15.7 23.56 39.8 6.3 94.22 147.24 212.2 376.93 588.96 848.1 1154.36 157.74 198.43 2355.85 3392.42 4617.47 69.48 7634.4 9469.44 13636.44 18472.68 24124.68 381.12 3788.52.25.56 1. 1.56 2.55 3.98 6.22 1.52 15.93 24.89 38.9 56.1 99.58 155.59 224.4 34.95 398.3 54.1 622.35 896.18 1219.9 1593.2 216.79 2489.38 3584.74 488.3 6372.82 8139.39 9957.53 14.94 33.61 59.75 93.35 152.95 238.98 373.4 631.6 955.92 1493.63 2333.8 336.66 5974.51 9335.18 13442.65 18297. 23898.12 3246. 3734.76 5377.68 73193.88 95592.24 1217.52 149362.92 21584.16 292818.24 382369.2 488363.16 597451.8 Installation precautions 1. Installation location should be such that the Flowmeter will always remain full with liquid. 2. A minimum 5D upstream & 3D downstream straight lengths should be maintained at installation locations where D is the pipe diameter. 3. The Flowmeter installation location should be free of bends, elbows, tees, valves, etc. 4
Ordering Code : Series 64 Approval M1 - MagFlow 641 Sensor Size D - None M2 - EcoMag 642 1-1 (¼ ) F - Flameproof M3 - MagBP 644 M4 - MagProbe 645 15-15 (½ ) 2-2 (¾ ) G - Any other (Pl. specify) 25-25 (1 ) Transmitter Type I - Integral R - Remote 32-32 (1.25 ) 4-4 (1.5 ) 5-5 (2 ) Protection Class for Sensor A - IP 65 View Software Y - Required (select communication interface) N - Not required Power Supply P1-24 V DC P2-8 to 3 AC P3 - Solar powered P4 - Battery powered (642, 644, 645) P5 - Any other (Pl. specify) Output OP1-4 - 2 ma DC OP2 - - 2 ma DC OP3 - Pulse output OP4 - Relay output OP5 - Combinations of above OP6 - Any other (Pl. specify) 65-65 (2.5 ) 8-8 (3 ) 1-1 (4 ) 125-125 (5 ) 15-15 (6 ) 2-2 (8 ) 25-25 (1 ) 3-3 (12 ) 35-35 (14 ) 4-4 (16 ) 45-45 (18 ) 5-5 (2 ) 6-6 (24 ) 7-7 (28 ) 8-8 (32 ) 9-9 (36 ) 1-1 (4 ) 12-12 (48 ) 14-14 (56 ) T1 - SS 34 T2 - SS 316 B - C - IP 68 Coil Housing CH1 - CS / MS CH2 - SS 34 CH3 - SS 316 Measuring Tube CH4 - Any other (Pl. specify) T3 - Any other (Pl. specify) Earthing Rings 1 - None (Earth electrode) 2 - SS 316 3 - SS 316L Communication Interface 16-16 (64 ) 4 - Any other (Pl. specify) C1 - Not applicable 18-18 (72 ) C2 - RS 232 (Modbus RTU) C3 - RS 485 (Modbus RTU) C4 - HART C5 - GSM C6 - GPRS 2-2 (8 ) Any other (Pl. specify) Electrode Material E1 - SS 316 E2 - SS 316L E3 - Hastelloy C E4 - Titanium Data Logger E5 - Tantalum Y - External (Pl. specify) E6 - Platinum N - Not required E7 - Any other (Pl. specify) Pressure Rating Design of Measuring Sensor Flange Material Sensor Lining R1-5 kg/cm² ( 642) S1 - Flange ANSI 15 F1 - CS / MS L1 - Hard rubber R2-1 kg/cm² S2 - Flange DIN PN F2 - SS 34 L2 - Neoprene R3-16 kg/cm² S3 - Flange BS 1 Table D/E F3 - SS 316 L3 - PTFE R4-25 kg/cm² S4 - Wafer F4 - Any other (Pl. specify) L4 - Polyurethane R5-4 kg/cm² S5 - SMS L5 - PFA R6 - Any other (Pl. specify) S6 - Tri clamp L6 - HDPE S7 - Any other (Pl. specify) L7 - Any other (Pl. specify) Note : For MagProbe 645 Insertion Type Flowmeter - sensor size, design of measuring sensor, flange material, sensor lining, earthing, coil housing choices are not available. 5
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