Sichuan Vacorda Instruments Manufacturing Co., Ltd |
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Electro Magnetic Dn10 to Pn300 Magnetic Flow Transmitter For Liquid
Caustic Soda
HKLD intelligent electromagnetic flowmeter is a kind of fully
intelligent electromagnetic flowmeter developed by our company with
advanced technology at home and abroad. Its Chinese electromagnetic
converter core uses high-speed central processing unit. The
calculation speed is very fast, the accuracy is high, and the
measurement performance is reliable. The circuit design of the
converter adopts international advanced technology, the input
impedance is up to 10 ohms, the CMRR is better than 100db, and the
rejection ability for external interference and 60Hz/50Hz
interference is better than 90db. It can measure the flow rate of
fluid medium with lower conductivity.
Electromagnetic Flow Meters are based on FARADAY'S LAW INDUCTION.
These meters are also called as Magflow or Electromagnetic Flow
Meters. A magnetic field is applied to the metering tube, which
results in a potential difference proportional to the flow velocity
perpendicular to the flux lines. The physical principle at work is
electromagnetic induction and mathematically defined as E=k*B*D*V.
Features
(1) The obstruction to the flow is almost nil and therefore this
type of meters can be used for measuring heavy suspensions,
including mud, sewage and wood pulp.
(2) There is no pressure head loss in this type of flow meter other
than that of the length of straight pipe which the meter occupies.
(3) They are not very much affected by upstream flow disturbances.
(4) They are practically unaffected by variation in density,
viscosity, pressure and temperature.
(5) Electric power requirements can be low (15 or 20 W),
particularly with pulsed DC types.
(6) These meters can be used as bidirectional meters.
(7) The meters are suitable for most acids, bases, water and
aqueous solutions because the lining materials selected are not
only good electrical insulators but also are corrosion resistant.
(8) The meters are widely used for slurry services not only because
they are obstruction less but also because some of the liners such
as polyurethane, neoprene and rubber have good abrasion or erosion
resistance.
(9) They are capable of handling extremely low flows.
Product Parameters
Product Name | Electromagnetic Flowmeter |
Repeatability error | +/-0.1% |
Accuracy class | 0.5 class, 1.0 class |
Measured medium temperature | Common rubber lining: -20~+60 ° c |
High temperature rubber lining: -20~+90 ° c | |
PTFE lining: -30~+100 ° c | |
High temperature vinyl lining: -30~+180 ° c | |
Rated working pressure | pipeline: DN10~DN65: ≤ 2.5MPa;DN80~DN150: ≤ 1.6MPa; |
Flow rate range | 0.3~15m/s |
Measured fluid conductivity | ≥5μs/cm liquid |
Output | 4~20mA / 4~20mA + Hart |
Electrode material | 316L, titanium (Ti), tantalum (Ta), Hastelloy (H), |
Working power supply | 85~265VAC / 24VDC / Battery |
Straight pipe length | pipe: ≥ 5DN in the upper reaches, downstream of greater than or equal to 2DN |
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Protection grade | standard: IP65; IP68(optional) |
Explosion-proof mark | mdllBT4 |
Deatail Images
Precautions
1. Try to avoid ferromagnetic objects and equipment with strong
electromagnetic fields, so as to avoid the magnetic field affecting
the working magnetic field of the sensor and the flow signal.
2. should be installed in a dry and ventilated place, to avoid sun
and rain, the ambient temperature should be -20 ~ +60 ° C, relative
humidity is less than 85%.
3. There should be plenty of space around the flowmeter for easy
installation and maintenance.
Installation requirements
The measurement principle of the electromagnetic flowmeter is that
it does not depend on the flow characteristics. If there is a
certain turbulence and vortex inside the pipeline, it will be
generated in the non-measurement zone (such as elbow, tangential
current limit or half-opening shut-off valve upstream). Measurement
is irrelevant. If steady-state eddy currents in the measurement
zone affect the stability of the measurement and the accuracy of
the measurement, then some measures should be taken to stabilize
the flow rate distribution:
A. Increase the length of the straight pipe before and after.
B. Using a flow stabilizer.
C. Reduce a section of the measuring point.