About the use and precautions of the freeze dryer First, we should pay attention to the following points when starting the machine:
1. When we turn on the main power switch of the freeze dryer, pay attention to keep its pressure digital display at 110pk;
2. If the temperature is expected to be the actual temperature of the cold trap, we can press and hold the total opening key on the control panel for more than three seconds;
3. After starting the refrigerator, we should pre-cool for more than 30 minutes and then use it;
4. Place the sample into the sample holder, cover the plexiglass cover, and activate the vacuum pump;
5. Wait until the pressure is stable and record the temperature and pressure values ​​at any time.
Second, what should be noted when using:
1. Extend the surface area of ​​the prepared sample as much as possible. The sample should not include organic solvents containing acids and bases and volatiles;
2, must ensure that the sample is completely frozen into ice, otherwise it will cause the residual liquid to be converted into a gaseous state to produce a spray;
3, the cold trap temperature is about -65 ° C, can replace the low temperature refrigerator, but in order to prevent frostbite must wear warm gloves for operation;
4. Whether the outlet valve is tightened or not and the inflation valve is closed, it must be checked before starting the vacuum pump, and the contact surface between the plexiglass cover and the rubber ring is clean and free of dirt and sealed well;
5. Under normal circumstances, the machine must not be used continuously for more than 48 hours;
6. During the process of freezing the sample, the temperature will gradually decrease. At this time, the sample that is still in the frozen state can be taken out and warmed for a while, and then dried, which can shorten the drying time.
After zui, the things to be aware of when preparing for shutdown are:
1. The pressure value and temperature before shutdown must be recorded;
2. Press and hold the inflation valve of the control panel, and immediately turn off the vacuum pump;
3, open the plexiglass cover, take out the sample must wait until the pressure is displayed as atmospheric pressure;
4, when you want to close, you should press and hold the total opening key for more than three seconds, then turn off the main power switch of the freeze dryer after Zui;
5. After the ice in the cold trap is completely turned into water, the outlet valve can be opened, and then the inner wall of the cold trap is cleaned with a dry cloth. After the Zui, it is necessary to remember that the large filter paper is dustproof.
1. When we turn on the main power switch of the freeze dryer, pay attention to keep its pressure digital display at 110pk;
2. If the temperature is expected to be the actual temperature of the cold trap, we can press and hold the total opening key on the control panel for more than three seconds;
3. After starting the refrigerator, we should pre-cool for more than 30 minutes and then use it;
4. Place the sample into the sample holder, cover the plexiglass cover, and activate the vacuum pump;
5. Wait until the pressure is stable and record the temperature and pressure values ​​at any time.
Second, what should be noted when using:
1. Extend the surface area of ​​the prepared sample as much as possible. The sample should not include organic solvents containing acids and bases and volatiles;
2, must ensure that the sample is completely frozen into ice, otherwise it will cause the residual liquid to be converted into a gaseous state to produce a spray;
3, the cold trap temperature is about -65 ° C, can replace the low temperature refrigerator, but in order to prevent frostbite must wear warm gloves for operation;
4. Whether the outlet valve is tightened or not and the inflation valve is closed, it must be checked before starting the vacuum pump, and the contact surface between the plexiglass cover and the rubber ring is clean and free of dirt and sealed well;
5. Under normal circumstances, the machine must not be used continuously for more than 48 hours;
6. During the process of freezing the sample, the temperature will gradually decrease. At this time, the sample that is still in the frozen state can be taken out and warmed for a while, and then dried, which can shorten the drying time.
After zui, the things to be aware of when preparing for shutdown are:
1. The pressure value and temperature before shutdown must be recorded;
2. Press and hold the inflation valve of the control panel, and immediately turn off the vacuum pump;
3, open the plexiglass cover, take out the sample must wait until the pressure is displayed as atmospheric pressure;
4, when you want to close, you should press and hold the total opening key for more than three seconds, then turn off the main power switch of the freeze dryer after Zui;
5. After the ice in the cold trap is completely turned into water, the outlet valve can be opened, and then the inner wall of the cold trap is cleaned with a dry cloth. After the Zui, it is necessary to remember that the large filter paper is dustproof.
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Chu Hou Sauce,Chinese Seasoning Chu Hou Sauce
KAIPING CITY LISHIDA FLAVOURING&FOOD CO.,LTD , https://www.lishidafood.com