VEVOR HFD-4 Bedienungsanleitung Seite 12

5.Drying endpoint and ventilation
The crude mark of the drying endpoint is the change of vacuum degree
and cold trap temperature. After a period of drying, the temperature of the
cold trap is no longer decreased, and the vacuum degree is stable to a high
degree.
At this time, the vacuum pump can be closed, and the drying chamber can
be ventilated through the vent valve.
Finally close the dryer and take out the sample.
6.Defrosting
The ice can be removed by room temperature or blower.
Installation and operation
1.Components
Fig.1-1 Main dryer
1.Power Supply Switch 2. USB 3. Display Screen
6. Water discharge and
4. Transparent door 5.. Vacuum interface
inflation valve
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