GFM82 series sanitary electromagnetic flowmeter

GFM82 series sanitary electromagnetic flowmeter

Overview

The GFM82 intelligent hygiene electromagnetic flowmeter is a stable and high-precision intelligent electromagnetic flowmeter developed based on Ferrari's electromagnetic induction principle and weight function magnetic field distribution technology. It is used to measure the flow rate of conductive liquids with conductivity greater than 5 μ s/cm. Using low-frequency rectangular wave excitation and intelligent converter technology, the zero point is very stable, with an accuracy of 0.5 level and a repeatability of 0.25%. The GFM82 intelligent sanitary electromagnetic flowmeter adopts a 4-8 multi electrode structure, which further ensures measurement accuracy and does not require a grounding ring at any time, reducing the size of the instrument and the trouble of installation and maintenance.

application

Suitable for flow measurement of conductive liquids and slurries in closed pipelines, such as clean water, sewage, various acidic and alkaline salts, mud, slurry, pulp, and liquids related to food. Widely used in industries such as metallurgy, papermaking, water treatment, chemical engineering, light industry, textiles, electricity, and mining.

feature

1. The biggest advantage of electromagnetic flowmeter is its high stability, no drift, and good repeatability

The intelligent electromagnetic flowmeter adopts low-frequency rectangular wave excitation with stable excitation current. This excitation method has the characteristics of being less affected by electromagnetic interference, not producing eddy current effect, less orthogonal interference and in-phase interference, and not producing polarization phenomenon. Therefore, the electromagnetic flowmeter has the advantages of low current, low power consumption, no heat generation, zero point stability, no drift, and less electrode pollution impact.

2. The output of an electromagnetic flowmeter is independent of the flow state under symmetrical distribution (laminar and turbulent), so the range ratio is extremely large, which can achieve a ratio of 100:1. It can measure fluid flow rates within the range of 0.3-12m/s (extended range of 0.1-15m/s).

3. There are no components inside the conductive fluid flow measurement tube that obstruct fluid flow, such as dirty media, corrosive media, and suspended liquid-solid two-phase media. The only components in contact with the fluid are the electrodes and lining, which are not blocked or sticky. According to the different corrosiveness, wear resistance, and temperature of the medium, different liners and electrodes are selected to measure the flow rate of contaminated, corrosive, and suspended liquid-solid two-phase media.

4. No additional pressure loss or energy consumption.

5. No mechanical inertia, sensitive response, can measure instantaneous pulsating flow, and can also measure flow in both positive and negative directions.

6. During the measurement process, it is not affected by changes in temperature, viscosity, density, and conductivity (within a certain range), and the measurement is stable.

7. The converter is equipped with an LCD display, buttons for menu settings, standard output signal is frequency signal, and 4-20mA current output and HART protocol communication can also be selected.

8. The converter utilizes patented technology for functional magnetic field analysis, completely eliminating the influence of bias current and ensuring accurate and stable measurements

9. For measuring the flow rate of slurry with interference from "slurry noise", the intelligent electromagnetic flowmeter is equipped with a patented technology converter with a "noise suppressor", which can completely eliminate clutter and ensure stable and accurate measurement.

10. The converter circuit has lightning protection components, suitable for field installation and use

11. The unique multi electrode structure completely eliminates electrical noise interference, which is more conducive to improving measurement accuracy.

12. The unique electrode lead method completely eliminates orthogonal interference and zero drift, making the measurement of the FFM62 series electromagnetic flowmeter more stable. Has good linearity and repeatability.

Technical Characteristics

1. Measurement fluid: Conductive fluid

2. Accuracy level: Level 0.5

3. Repeatability: 0.15%, 0.25%

4. Fluid temperature range: -25 ℃ to 180 ℃

5、 额定压力4.0 MPa、1.0MPa、0.6MPa、0.25MPa

6. Medium flow velocity range: 0.3-12m/s

7. Conductivity: ≥ 0.5 μ s/cm

8. Electrode materials: 316 stainless steel, Hastelloy B, Hastelloy C, tantalum, titanium, platinum, tungsten carbide, etc

9. Number of electrodes: 4 electrodes (≤ DN500), 6 electrodes (≥ DN600)

10. Lining materials: chloroprene rubber CR, polytetrafluoroethylene F4 (PTFE), polytetrafluoroethylene F46 (FEP), polyurethane rubber PU, etc

11. Body flange material: 304 stainless steel, 20 # carbon steel, other materials (special order)

12. Installation form: clamp type (≤ DN300), flange connection type (≥ DN350)

13. Protection level: IP65, IP68

14. Converter power supply: 220 ± 20%, 60HZ, and 24VDC power supply options available

15. Signal output: The standard output signal is pulse output, and there are also 4-20mA outputs available for selection, including HART communication protocol and MODERBUS protocol

16. Structural form: integrated and split type (with 5m standard cable)

17、 功耗： 0.65W

18. Working environment: Environmental temperature: -25 ℃~60 ℃, humidity: 5%~90%

19. Explosion proof grade: Not explosion-proof

20. Converter display interface: an all English LCD display interface and operation interface that can display instantaneous flow, cumulative flow, and multiple flow units for selection.

Installation site selection

1. Choose a location where there will be no negative pressure inside the measuring tube

2. Avoid installing in accessories of strong electrical equipment such as motors and transformers to prevent electrical interference

3. Avoid places with strong corrosive gases around the installation location

4. When measuring mixed phase fluids, avoid locations that may cause phase separation

5. The ambient temperature should generally be within the range of -25 ℃ to 60 ℃, and direct sunlight should be avoided as much as possible

6. Installed in environments without vibration or with low vibration, if the vibration is too high, fixed supports should be added to the pipes before and after the sensor

7. The relative humidity of the environment should be within the range of 10% to 90%

8. Avoid installing in places that can be directly rained or submerged by rainwater