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How to use a flow meter to achieve quantitative control? - Focus on Microfluidic Control Technology
How to use a flow meter to achieve quantitative control? Quantitative Control Flowmeter Application: Sewage Dosing Controller, Quantitative Water Addition, Dosing, Food Adding Water System, Cosmetic Water Addition System, Dosing System, Chemical Liquid Dosing System, etc. HPPLC quantitative control/quantitative dosing/automatic dosing/manual operation dosing/flow automatic control device/button type operation dosing/quantitative canning/replacement cans are all based on the accurate measurement of pipeline flow When the item cumulant reaches a certain value, a function of automatically cutting off the pipe is performed. This solution is mainly based on the pulse flow signal fed back by the flowmeter to the quantitative controller. When the flow cumulative flow reaches the set value (quantitative value), the quantitative controller will give a switch signal to the electromagnetic valve or pump, which has reached the valve and the pump. Start and shut down control. Realize automatic and manual control of feeding. The system has high precision, simple operation, and field calibration. At present, many companies will use or need to improve one of the projects. It has features such as easy operation, intuitive display, manual control of flow, or automatic control flow. It is especially suitable for the quantitative control of oil-filled, water-mixed, drug-injected, batching, quantitative water injection, and various liquids. At present, some companies still adopt manual operation of canning/drilling, and they do not want to invest too much money. Companies that want to improve their work efficiency are advised to adopt this system. 1. Flowmeter: This is the basis of control and directly affects the effect of control. Therefore, the basic requirement is that the higher the measurement accuracy is, the better the signal output function is. At the same time, there are many kinds of flowmeters, and the selection of suitable flowmeters is based on the selection of parameters such as measuring medium, pipe diameter and flow range. 2, HPPLC control box: contains the entire Chinese liquid crystal quantitative control device, internal control circuits and components, external control buttons and lights, the box's standard size 400 * 300 * 200mm, power supply AV220V. 3. Cut-off equipment: It can be the existing power equipment of the pipeline, such as a pump; it can also be a post-installed solenoid valve, electric valve, and flow valve. Second, the control process After the quantitative controller receives the flow signal from the flowmeter, it completes the accumulation of the flow within it and simultaneously sets the required quantitative control value inside the controller. When the quantitative value displayed by the quantitative controller reaches the set quantitative value When controlling the value, the quantitative controller outputs the switching signal. At this time, the switch signal is used to control the cut-off equipment installed on the pipeline by matching relays or contactors so as to achieve quantitative control effect. Third, product characteristics 1, only need flow meter, control box and cut off equipment, simple structure, low cost; 2. The control circuit and components in the control box are tailored according to the customer's required flow meter and equipment. The signal line connection is simple, and there is no need to adjust after the scene; 3, the control box panel has "start", "stop" and "clear" button, and a "state light" display, so the display is intuitive, easy to operate, convenient and easy to learn; 4. The quantitative control instrument is a full Chinese liquid crystal display. Each time the quantitative control value can be arbitrarily changed as needed, it only needs to be completed in the quantitative control instrument; Fourth, the main function 1, with large and small valve control, respectively, control the large flow and small flow, to achieve accurate quantitative control; 2. When the pump and the valve are controlled at the same time, there is a pump delay start and a pump advance shut-off function; 3, with overflow, helium pump interface, the occurrence of flash, helium pump closed immediately when the material protection; 4, in the quantitative control instrument can view the total accumulation, instantaneous flow, time, flow meter input signal value, etc. There are several query functions such as the number of batches, the time of each batch, the amount of each batch, the daily or monthly total, etc.