Industry 4-20 ma integrated magnetic flow meter facory with HART
Product Description
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.
Features
1. No moving and blocked flow parts in the pipeline, almost no
additional pressure loss in the measurement.
2. Measurements results are independent of physical parameters,
such as flow distribution, fluid pressure, temperature, density and
viscosity.
3. On-site modification of the measuring range available.
4. LCD display, easy to use and simple to operate.
5. Using SMD devices and SMT technology.
6. Using 16-bit embedded processors with fast speed and high
accuracy, enhancing the stability of measurement.
7. Anti-interference, reliability, measurement range up to 150:1.
8. Ultra low EMI switch, wide range of power supply voltage.
9. RS485, RS232, Hart and Modbus digital communication signal
output.
10. Self-checking function.
Application
Due to its unique advantages, it is widely used in the fields of
petroleum, chemical industry, steel, light industry, sewage
processing, environmental protection, water conservancy project and
pharmacy to measure the volume flow of the conducted liquid
mediums, such as acid, alkali, salt solution and so on.
Technical parameters
PTFE Lined Pipe | 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300,
350, 400, 450, 500, 600 |
Rubber Lined Pipe | 40, 50, 65, 80, 100, 125, 150, 200, 300, 350, 400, 500, 600, 800,
1000, 1200, note: special specifications can be customized |
Flow direction | positive and negative, net flows Turndown |
Measuring range ratio | 150:1 |
Repeatability error | +/-0.1% |
Accuracy | piped: 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; DN200~DN1200: ≤ 1.0MPa |
Flow measuring range | flow measuring range corresponding to flow rate range is 0.3~15m/s |
Measured fluid conductivity | 5μs/cm (Most with water as the composition of the medium, its
conductivity in the range 200~800 Mu s/cm, optional solenoid flow) |
Output | Current:4~20mADC (isolation), pulse frequency 0~1kHz, OCT
photoelectric isolation, external power ≤ 35VDC, breakover,
collector Max 25mA |
Load resistance | < 600 Ω |
Electrode material | 316L, titanium (Ti), tantalum (Ta), Hastelloy, (h), Platinum (Pt)
or other special electrode materials |
Protection grade | standard: IP65; IP68 |
Working power supply | 85~265VAC 45~63HZ |
Straight pipe length | pipe: ≥ 5DN in the upper reaches, downstream of greater than or
equal to 2DN |
Connections | flow meter connected to the piping is used between flanges, flange
connection dimensions comply with GB9119-88 requirements. |
Explosion-proof mark | mdllBT4 |
environment temperature | -25 ° c ~=60 ° c |
Relative humidity | 5%~95% |
Total power consumption | <20W |
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.
