GFM82 series threaded electromagnetic flowmeter

GFM82 series threaded electromagnetic flowmeter

Overview

GFM82系列The thread type electromagnetic flowmeter is an intelligent electromagnetic flowmeter developed based on Ferrari's electromagnetic induction principle and weight function magnetic field distribution technology, which has good stability and high accuracy. It is used to measure conductivity greater than5Ms/cmThe flow rate of conductive liquid. Using low-frequency rectangular wave excitation and intelligent converter technology, the zero point is very stable and accurate0.5Grade, repeatability0.25%The intelligent electromagnetic flowmeter adopts4-8The multi electrode structure further ensures measurement accuracy and eliminates the need for a grounding ring at any time, reducing the size of the instrument and the trouble of installation and maintenance.

feature

1The biggest advantage of the GFM82 series intelligent 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 electromagnetic flowmeter is independent of the flow state under symmetrical distribution (laminar and turbulent), so the range ratio is extremely large, which can achieve100∶1The measurable flow velocity range is0.3～12m/s,(Extended range0.1～15m/s)The fluid flow rate inside.

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. Converter withLCDDisplay, press the button to set the menu, the standard output signal is frequency signal, and you can also choose4～20mACurrent outputHARTProtocol communication.

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 measurements with“Slurry noise”Interference with slurry flow, intelligent electromagnetic flowmeter with“noise suppressor”The patented technology converter can completely eliminate clutter, ensuring stable and accurate measurement.

10. The converter circuit has lightning protection components and is 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, makingGFM82The series electromagnetic flowmeter has more stable measurement. Has good linearity and repeatability.

Technical Characteristics

1Measurement fluid: conductive fluid

2Accuracy level:0.5level

3Repeatability:0.15%、0.25%

4Fluid temperature range:-25℃～180℃

5Rated pressure4.0MPaThe1.0MPaThe0.6MPaThe0.25MPa

6Range of medium flow velocity:0.3～12m/s

7Conductivity:≥0.5Ms/cm

8Electrode material:316Stainless steel, Hastelloy alloyB、 哈氏合金CTantalum, titanium, platinum, tungsten carbide, etc

9Number of electrodes:4An electrode（≤DN500），6Electrodes(≥DN600)

10Lining material: chloroprene rubberCRPolytetrafluoroethyleneF4（PTFE）Perfluoroethylene propyleneF46（FEP）Polyurethane rubberPUwait

11Body flange material:304Stainless steel20#Carbon steel, other materials (special orders)

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

13Protection level:IP65TheIP68

14Converter power supply:220±20%The60HZand24VDCTwo power supply modes to choose from

15Signal output: The standard output signal is pulse output, and there are also selectable outputs available4～20Ma，HARTCommunication protocol,MODERBUSagreement

16Structural forms: one-piece and split type (with5mStandard cable)

17Power consumption:0.65W

18Working environment: Environmental temperature:-25℃～60℃The humidity is5%～90%

19Explosion proof grade: Not explosion-proof

20Converter display interface: all in EnglishLCDThe display interface and operation interface 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

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

3Avoid places with strong corrosive gases around the installation location

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

5The ambient temperature should generally be within-25℃～60℃Within the scope, try to avoid direct sunlight as much as possible

6When 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

7The relative humidity of the environment should be within10%～90%within the scope of

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