When using the Freezer Dryer for the first time, the components of the instrument must be thoroughly cleaned. The stainless steel parts are cleaned with ethanol and the plexiglass is washed with physiological saline. The ampoule is cleaned with an ultrasonic cleaner.
Freeze before drying must be pre-frozen, want to prepare low-temperature refrigerator, minus 40 degrees Celsius, or minus 80 degrees Celsius low-temperature refrigerator, the preparation of dry items placed in low-temperature refrigerator or liquid nitrogen, generally takes about four hours, Can be observed directly from the outside, the items completely frozen and solid, can be carried out freeze-drying experiments, the items quickly moved to the Freezer Dryer tray to ensure that the freeze-drying effect.
Between the host and the vacuum pump by the green vacuum tube connection, the connection using the international standard clamp. In order to effectively prevent the leakage of air, the clamp is specially designed in the clip inside a sealed rubber ring. In the way to prevent leakage on the application of appropriate amount of vacuum grease in the rubber ring, and then clamp the clamp, can make the connection more closely fit together. If there is no clamping clamp, it will cause air leakage, resulting in the extraction of vacuum when the dashboard shows a digital value greater than 20pa, then you should check the vacuum pump and Freezer Dryer glass cover air tightness.
Freezer Dryer The right side of the main board is equipped with two power outlets, one will be the vacuum pump power cord connected to the host, and then the second Freezer Dryer on the total power plug on the power supply.
Before the vacuum pump must be checked whether to join the vacuum pump oil, or can not run properly. Oil surface shall not be lower than the center line of the oil mirror, the vacuum pump at the beginning of the use of a relatively strong jitter, slowly will become smooth.
If the air tightness is not good, should be in the cold trap above the sealed rubber ring smear some vacuum grease, the organic glass cover light spin on the rubber ring, open the vacuum pump to test its air tightness. To ensure the integrity of the gas closed.