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Specific explanation of the application of mass flow controller

Specific explanation of the application of mass flow controller
The mass flow controller can output the flow measurement as an output standard electrical signal. This is very easy to achieve digital display of the flow, automatic measurement of cumulative flow, automatic data recording, computer management and so on. For mass flow controllers, automatic flow control can also be achieved. Usually, the analog MFC/MFM input/output signal is 0 to +5V or 4 to 20mA. The digital MFC/MFM is also equipped with an RS232 or RS485 digital serial communication port, which can be easily connected to a computer for automatic control. The mass flow controller can accurately control the amount of gas given, which is particularly useful for flow control in many processes, proportional control for different gases, and the like. The mass flow controller has a wide range of working pressure. Our products can be used from vacuum up to 10MPa; it can be applied to many kinds of gaseous media (including some corrosive gases such as HCL); there is a wide range of flow rate, our products zui Small flow range up to 0 ~ 5sccm, zui large flow range up to 0 ~ 200slm. The resolution of the flow rate display can reach 0.1% of full scale, and the flow control range is 2 to 100% of full scale. The turndown ratio is -50:1, so the mass flow controller is widely used in many fields.
The application of the mass flow controller is very extensive. The application significance of the mass flow controller and the application technology research goal are to be used correctly. Among them, the following are the specific contents.
(1) Improve the open rate In the management of instrument and equipment, the definition of open rate is: (the total number of instruments used in a meter is not used normally)/the total number of instruments. Therefore, increasing the opening rate is to reduce the number of meters that cannot be put into normal use. In the design institute, the measurement system designed by the self-control professional is one of the important indicators reflecting the work quality and technical proficiency of the designers. The experienced and responsible design personnel can achieve an open rate of 95% or more. Through the rectification reached 95%. However, under the conditions of a market economy, engineering companies tend to implement the teaching-key contracting approach for owners. The required open-listing rate is not 95%, but 100%. If the designed instrument system cannot be put into use normally, if it is an engineering company Responsibility, that is to carry out rectification or replacement of instruments, which means economic losses. Therefore, the research of mass flow controller application technology has practical economic significance.
(2) Mass flow controller ensures measurement accuracy Flow measurement accuracy refers to the accuracy obtained by the flow measurement system, which is different from the accuracy of the flowmeter itself. Only the flowmeter itself has good performance and high accuracy, which does not necessarily result in higher measurement accuracy.
(3) The mass flow controller improves the reliability of the flow measurement system. If the flow meter used for safety interlocking alarm is not reliable, it should not operate when the interlocking action occurs, and it is easy to cause an accident. If the flow does not operate, it will easily lead to failure. Due parking should cause loss. If the flow meter used for process control is not reliable, it is easy to send wrong information to the regulating system, resulting in a misadjustment of the regulating system, destroying the stability of the production process, affecting the quality, output and material consumption of the product and causing losses. If the flow meter used for financial settlement measurement is not reliable, it will easily cause measurement inaccuracy, trigger measurement disputes and bring losses to the company. It can be seen that the reliability of the mass flow controller is extremely important.
(4) Cost savings In addition to the instrument purchase fee, the expenses mentioned here shall also be included in the attachment purchase costs, installation and commissioning costs, operating costs, spare parts costs, maintenance and regular calibration (certification) fees, and the average life of the instrument The depreciation expense charged is also not negligible.
(5) Safety Some measured fluids are flammable and explosive media. Some instrument installation sites are flammable and explosive. The selection, system design and installation of mass flow controllers should comply with explosion-proof regulations.

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