Prepare for "warm-up" before working on the freezer dryer.

The "warm-up" before the work of the freeze dryer to prepare for thorough cleaning of the equipment components is one of the conditions to ensure that there is no cross-contamination during the work process.
, when using a freeze dryer, the industry says the components of the equipment are thoroughly cleaned.
cleaning conditions vary from component to component.
, for example, stainless steel components need to be cleaned with ethanol, lysos need to be cleaned with salt water, and ampoules need to be cleaned with an ultrasonic cleaner.
Prefreeze is to be prefrozen before freezing and drying, prefreeze requires preparing a low temperature refrigerator of minus 40 degrees C, or minus 80 degrees C, and placing the ready-to-dry items in a low-temperature refrigerator or liquid nitrogen, usually takes about four hours, a process that can be observed directly from the outside of the device.
when the item ice freezes solid, can carry out the freeze-drying experiment, the item quickly moved to the freeze-dryer tray, to ensure the freeze-drying effect.
the airtry freeze dryer of the inspection equipment and the vacuum pump is connected by a green vacuum tube using an international standard clamp at the connection.
this clamp is designed with a sealed rubber ring in the clamp to effectively prevent air leakage.
in the method of preventing air leakage, it is recommended to apply the appropriate amount of vacuum grease on the rubber ring, and then clamp tight, so that the connections more closely together.
If there is no clamping, it will cause air leakage, resulting in the dashboard display value is greater than 20pa when vacuum extraction, at this time should check the vacuum pump and freeze dryer glass cover air tightness.
If the air tightness is not good, you should apply some vacuum grease to the sealed rubber ring above the cold trap, gently spin the phosphor cover on the rubber ring, and test its air tightness by opening the vacuum pump.
to ensure the integrity of the gas closure.
The vacuum pump is operated before checking that there are two power outlets on the right-hand panel of the vacuum pump oil freezer host, one connects the power cord of the vacuum pump to the host, and then plugs the total power supply from the second freeze dryer into the mains.
the vacuum pump before running, check that vacuum pump oil is added, otherwise it will not function properly.
the oil surface must not be lower than the middle line of the oil mirror, the vacuum pump at the beginning of use has a relatively strong jitter, slowly will become stable.
drying cold trap in addition to the above "warm-up" preparation, the industry said that before the equipment should pay attention to remove moisture from the cold trap room, if necessary, dry cold trap.
the drain valve before each freeze-drying job.
, do not switch frequently during use, such as due to operational errors caused the chiller to stop running, can not start immediately, at least 20 minutes before starting again, so as not to damage the chiller.
freeze-drying, the ice on the cold trap tube will turn into water, you can use a towel to clear, freeze-dried end spin open the "inflatable valve" to the cold trap when inflated slowly, so as not to break the vacuum meter.
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