Preparation of Shanghai Qiaofeng brand freeze dryer before operation

When using the freeze dryer for the first time, all parts of the instrument must be thoroughly cleaned, stainless steel parts are washed with ethanol, and organic glass is washed with physiological saline. Ampoules are cleaned with an ultrasonic cleaner.

It must be pre-frozen before freeze-drying. If you want to move, you need to prepare a low-temperature refrigerator, minus 40 degrees Celsius, or minus 80 degrees Celsius. Put the items to be dried in a low-temperature refrigerator or liquid nitrogen. It usually takes about four hours. It can be observed directly from the outside that the freeze-drying experiment can only be carried out after the item is completely frozen and frozen, and the item is quickly moved into the tray of the freeze-drying machine to ensure the freeze-drying effect.

The main unit and the vacuum pump are connected by a green vacuum tube, and the connection point uses an international standard clamp. In order to effectively prevent air leakage, this clamp was designed with a sealing rubber ring in the clamp. In the method of preventing air leakage, apply an appropriate amount of vacuum grease on the rubber ring, and then clamp it with a clamp to make the joints fit closer together. If the clamp is not tightened, it will cause air leakage, which will cause the instrument panel to display a digital display value greater than 20pa during vacuum extraction. At this time, the air tightness of the vacuum pump and the glass cover of the freeze dryer should be checked.

There are two power sockets on the right side panel of the main unit of the freeze dryer. One connects the power cord of the vacuum pump to the main unit, and then plugs the total power supply of the second freeze dryer into the power source.

Before operating the vacuum pump, you must check whether the vacuum pump oil is added, otherwise it will not run normally. The oil level should not be lower than the center line of the oil mirror. When the vacuum pump is used at the beginning, there will be strong vibration, and it will gradually become stable.

If the air tightness is not good, you should apply some vacuum grease to the sealing rubber ring above the cold trap, lightly spin the organic glass cover on the rubber ring, and test the air tightness by turning on the vacuum pump. To ensure the integrity of the gas seal.

Product categories of Necklace Paper Box, we are specialized manufacturers from China, Paper Necklace Box, Custom Necklace Box suppliers/factory, wholesale high-quality products of Necklace Gift Box R & D and manufacturing, we have the perfect after-sales service and technical support. Look forward to your cooperation!

Necklace Box

Necklace Box,Necklace Jewelry Box,Necklace Paper Box,Necklace Gift Box

Huizhou Cailang Printing Products Co.,Ltd. , https://www.paperboxs.nl