How to use KOBOLD flowmeter correctly?

Next we will introduce to you how to use KOBOLD flowmeter correctly.

First: Correct use of the Kebao flowmeter and regular and correct operating methods can ensure the life of the flowmeter. Improper use and operation will cause corresponding damage to the flowmeter, which will not only affect the performance but also Damage the service life of the equipment. In daily use, you must pay attention to the correct operation method during operation.

Second: Regular maintenance. Necessary maintenance is a very good guarantee to extend the service life of the flow meter. Any problems or faults found must be solved in time. Don't ignore the repair just because the problem is not serious and does not affect the performance. The accumulated flow meter will have more faults for a long time and will eventually be scrapped.

Third: To extend the life of the Kebao flowmeter, it is not only the flowmeter itself, but also the overall components in the flowmeter, such as: magnetic circuit system, measuring catheter, and electrode. Maintenance, etc., these are very important.

Fourth: Choose a brand manufacturer with professional after-sales service. Because there are many manufacturers of flow meters on the market today, including large manufacturers and small manufacturers, the quality of flow meters on the market today is uneven, and cannot be achieved by any process and hardware equipment, making all kinds of toy meters. Therefore, users must choose a manufacturer with excellent quality, reputation and after-sales service when purchasing.

At present, the domestic flow meter market is very impressive. Instrument developers are still constantly improving product performance, customized equipment and refined intelligent products. Therefore, learning to use flow meters also lays the foundation for the industrial control industry.

Hi, this is the little industrial control housekeeper. Today I will show you how to use the flow meter better to make it last longer and be more efficient. Our common flow meters generally include mass flow meters, electromagnetic flow meters, vortex flow meters, etc., which can measure gases and liquids. Different flow meters also have different functions and characteristics, and these flow meters have a common feature, which is that they require regular maintenance. , so that it can be used better.

The correct way to use KOBOLD liquid flow meter:

1. The installation of liquid flow meter adopts flange connection, threaded connection and clamp-on type; according to different needs, different Install the connection method.

2. During installation, the liquid flow direction should be consistent with the direction of the arrow indicating the flow direction on the sensor housing, and the upstream straight pipe section should be ≥20dn, and the downstream straight pipe section should be ≥5dn, where dn is the inner diameter of the pipe.

3. The sensor should be kept away from external magnetic fields. If it cannot be avoided, necessary measures should be taken; the magnetic field will affect the accuracy of the measurement.

4. In order not to affect the normal transportation of liquid during maintenance, bypass pipes should be installed outside the straight pipe sections at both ends of the sensor; 5. When the sensor is installed in the open air, please waterproof the amplifier plug; 6 For the wiring of sensors and display instruments, the wiring method should be selected according to the power supply of the amplifier. You can refer to the manufacturer's instructions or request the manufacturer to guide the installation.

7. Liquid flow meterThe sensor can be installed horizontally or vertically. When vertically, the fluid direction must be upward. The liquid should fill the pipe and there should be no air bubbles. During installation, the direction of liquid flow should be consistent with the direction of the arrow indicating the flow direction on the sensor housing. The upstream end of the sensor should have a straight pipe section of at least 20 times the nominal diameter, and the downstream end should have a straight pipe section of no less than 5 times the nominal diameter. The inner wall should be smooth and clean, without defects such as dents, scale, and peeling.

8. If the fluid is unstable and has pulsating flow, in order to ensure good and stable measurement of the flow meter, a buffer can be installed as needed to eliminate the pulsating flow. When using the liquid flow meter, you should first slowly unscrew the control valve on the upstream pipe of the flow meter, and then use the regulating valve to adjust the flow rate to avoid sudden opening, causing the float to rise rapidly and damage the cone pipe.

KOBOLD electromagnetic flowmeter is an instrument for measuring conductive liquids based on Faraday's law of electromagnetic induction.

Electromagnetic flowmeters have a series of excellent characteristics that can solve problems that are difficult to apply with other flowmeters, such as the measurement of dirty flows and corrosive flows.

In the 1970s and 1980s, electromagnetic flow made a major breakthrough in technology, making it a widely used type of flow meter, and its usage percentage in flow meters continues to increase.

Advantages of Kebao flowmeter:

(1) The measurement channel is a smooth straight tube that will not be blocked and is suitable for measuring liquid-solid two-phase fluids containing solid particles, such as Paper pulp, mud, sewage, etc.; (2) There is no pressure loss caused by flow detection, and the energy saving effect is good; (3) The measured volume flow is actually not significantly affected by changes in fluid density, viscosity, temperature, pressure and conductivity Impact; (4) Large flow range and wide caliber range;

(5) Corrosive fluids can be applied.

Disadvantages of Kebao flowmeter:

(1) The application of electromagnetic flowmeter has certain limitations. It can only measure the liquid flow of conductive media and cannot measure the liquid flow of non-conductive media. Flows such as gas and water treatment are better for heating water. In addition, its lining needs to be considered under high temperature conditions.

(2) The electromagnetic flowmeter determines the volume flow rate under working conditions by measuring the speed of conductive liquid. According to the measurement requirements, for liquid media, the mass flow rate should be measured, and measuring the medium flow rate should involve the density of the fluid. Different fluid media have different densities, and they change with temperature. If the electromagnetic flowmeter converter does not consider the fluid density, it is inappropriate to only give the volume flow rate at room temperature.

(3) The installation and debugging of electromagnetic flowmeters are more complicated than other flowmeters, and the requirements are more stringent. The transmitter and converter must be used together, and two different types of instruments cannot be used together. When installing the transmitter, from the selection of the installation location to the specific installation and debugging, the product instructions must be strictly followed. There should be no vibration or strong magnetic field in the installation location. During installation, the transmitter and pipeline must have good contact and good grounding. The potential of the transmitter is the same as that of the fluid being measured. When using, it must be thoroughly testedThere is no gas remaining in the measuring tube, otherwise it will cause large measurement errors.

(4) When the electromagnetic flowmeter is used to measure viscous liquids with dirt, the viscous matter or sediment adheres to the inner wall of the measuring tube or the electrode, causing the output potential of the transmitter to change, causing measurement errors. , the dirt on the electrode reaches a certain thickness, which may cause the meter to be unable to measure.

(5) Scale or wear of the water supply pipeline changes the inner diameter, which will affect the original flow value and cause measurement errors. For example, a 1mm change in the inner diameter of a 100mm diameter instrument will bring about an additional error of about 2%.

(6) The measurement signal of the transmitter is a very small millivolt level potential signal. In addition to the flow signal, it also contains some signals that have nothing to do with flow, such as in-phase voltage, quadrature voltage and common mode. voltage, etc. In order to accurately measure flow, it is necessary to eliminate various interference signals and effectively amplify the flow signal. The performance of the flow converter should be improved. It is best to use a microprocessor-based converter. Use it to control the excitation voltage. Select the excitation mode and frequency according to the properties of the fluid being measured, which can eliminate in-phase interference and orthogonal interference. However, the improved instrument structure is complex and the cost is high.

(7) The price is higher

Application overview of KOBOLD flowmeter:

KOBOLD electromagnetic flowmeter has a wide range of application fields, and large-diameter instruments are often used in Water supply and drainage projects; small and medium diameters are often used in high-demand or difficult-to-measure situations, such as cooling water control at blast furnace tuyere in the steel industry, measurement of pulp liquid and black liquor in the papermaking industry, strong corrosive liquids in the chemical industry, and slurry in the non-ferrous metallurgical industry; small diameter, micro Calibers are often used in places with hygienic requirements such as the pharmaceutical industry, food industry, and biochemistry. ?Since EMF entered industrial application in the early 1950s, its use areas have been increasingly expanded. Since the late 1980s, it has accounted for 16% to 20% of the sales of flow meters in various countries. ?my country has developed rapidly in recent years, with sales estimated to be 6,500 to 7,500 units in 1994. China has produced ENFs with a maximum diameter of 2~6m, and has equipment capabilities for real-flow verification of a diameter of 3m.

If you want to know more information, please click: KOBOLD flow meter