The development of LED display has experienced five processes: stationary period - development period - high tide period - low valley period - maturity period. The installation and use of LED display screens in the first-tier cities are more and more advanced, and installation applications are becoming more and more advanced. Many, and the second-class cities and three types of cities are only preliminary penetration. At present, the installation of led displays is mainly to the second- and third-tier cities, and the second- and third-tier cities will become the main growth of LED displays. It can be seen that the market development of second and third tier cities is the main direction of LED products. The outdoor market will be a relatively large growth point for second- and third-tier cities. Outdoor LED displays are mainly used for outdoor advertising media, so they must be required to work properly in different climates. Then, what problems should customers pay attention to when purchasing LED display? Xiaobian has compiled several common precautions for reference. First, the main problems of the outdoor screen are as follows: the display screen is installed outdoors, often exposed to the rain, the wind blows the dust cover, and the working environment is bad. If the electronic equipment is wet or seriously damp, it may cause a short circuit or even a fire, causing malfunction or even fire, resulting in loss. Second, the display screen may be attacked by strong electric power caused by lightning. Third, the ambient temperature changes greatly. When the display is working, it must generate a certain amount of heat. If the ambient temperature is too high and the heat dissipation is poor, the integrated circuit may not work properly or even be burned, so that the display system cannot work normally. Fourth, the audience is wide, the distance between the distance is long, the field of vision is wide; the ambient light changes greatly, especially in direct sunlight. In response to the above special requirements, the outdoor display must: (1) Install the ventilation equipment to cool down, so that the internal temperature of the screen is between -10 °C and 40 °C. An axial fan is installed on the back of the screen to dissipate heat. (2) Select industrial-grade integrated circuit chips with an operating temperature between -40 °C and 80 °C to prevent the display from starting up due to low temperature in winter. (3) Install lightning protection devices on the display screen and buildings. The main body and the outer casing of the display are well grounded, and the grounding resistance is less than 3 ohms, so that the large current caused by lightning is discharged in time. (4) The joint between the screen body and the screen body and the building must be strictly waterproof and leakproof; the screen body should have good drainage measures, and the water can be discharged smoothly once the water accumulation occurs. (5) In order to ensure long-distance visibility in a strong environment, ultra-high brightness LEDs must be used. (6) The display medium adopts a new wide viewing angle tube with wide viewing angle, pure color, consistent coordination, and a service life of more than 100,000 hours. The outer packaging of the display medium is currently the most popular belt-shaped rectangular cylinder, sealed with silicone and without metallization. After the above treatment, in addition to its exquisite appearance and sturdy and durable, the outdoor LED display also has the characteristics of anti-sunlight direct, dustproof, waterproof, high temperature resistant and anti-circuit short circuit "five defenses". Pilot Type Freeze Dryer
13. Setting the user level and password , and decentralizing operation management.
Pilot Type Freeze Dryer Pilot Type Freeze Dryer,Pilot Type Plant Freeze Dryer,Pilot Type Pharmaceutical Freeze Dryer,Laboratory Type Pilot Freeze Dryer,Electric Heating Pilot Type Freeze Dryer,Silicon Heating Pilot Type Freeze Dryer Zhengzhou mingyi instrument equipment co.,ltd , https://www.mingyint.com
This model is widely used in medicine, pharmacy, biology research, chemical industry and food production ,etc. After the freeze drying process,a long term preservation is much easier. They can be restored to the original state and maintain their chemical and biological characteristics after being watered.
Main Features:
1. It is our company's patented product . Freezing and drying is finished in the same place. It is easy to operate,and have a good drying effect.
2. Patented gas diversion technology, uniform ice catching in cold traps, and strong ice catching capability.
3. Internationally renowned brand compressors, high efficiency, long life, low noise.
4. Separator patented technology and partition temperature fuzzy control technology, the shelf temperature difference is small, the temperature control accuracy is high, and the drying effect is even.
5. The freeze-drying curve optimization control technology can control the cooling rate in the pre-freeze phase, and at the same time, it can control the sample heating rate and the current stage vacuum degree in the sublimation and analytical drying stages.
6. The powerful sensor calibration function ensures the long term accuracy of the measured value.
7. 7-inch true color industrial embedded touch screen + SH-HPSC-II modular controller, high control accuracy, stable and reliable performance.
8. The professionally designed FD-PILOT control system can save hundreds of process recipes. Each recipe contains 50 temperature control zones to improve the process optimization rate.
9. Intelligent data recording system, real-time record and display the cold trap temperature curve, sample temperature curve, vacuum curve, export data can be viewed through the computer and print a variety of operations to facilitate process optimization and verification of drying effect.
10. Flexible manual + automatic control, manually used for groping the process, automatically used for mass production.
11. Real-time alarm display and historical alarm query function to facilitate fault diagnosis and equipment maintenance.
12. Vacuum adjustment during drying operation to avoid foaming and blowing of special materials and improve drying efficiency.
