Anatomy of the use of freeze dryers and precautions

1, when we turn on the total power supply switch of the freeze dryer, pay attention to keep its air pressure number to 110pk; After starting the chiller, we should pre-cool for more than 30 minutes and then use it; 4, put the sample into the sample holder, cover the lycopical glass cover, and start the vacuum pump; 5, wait until the air pressure number is stable, record the temperature and pressure values at any time.
Things to be aware of when using: 1, as far as possible to expand the surface area of the preparation sample, the sample should not include acid-base substances and volatile organic solvents; Whether the water valve is tightened or not and whether the inflatable valve is closed must be checked before starting the vacuum pump, while paying attention to whether the contact surface of the lyne glass cover and rubber ring is clean and free of dirt and sealed well;
Things to be aware of when preparing for shutdown are: 1, the air pressure value and temperature before the freeze dryer shutdown must be recorded; 4, to close, should hold down the total opening key for more than three seconds, shut down the total power supply switch of the freeze dryer; 5, after the ice in the cold trap is completely turned into water, you can open the water valve, and then use a dry cloth to clean the inner wall of the cold trap, but also remember large sheets of filter paper dust.