VEVOR HFD-4 Bedienungsanleitung Seite 16

5.In control interface, touching main interface button and getting in;
6.In main interface, touching user parameters button and getting in;
7.In user parameters interface, could setting drying process, including
stage number, temperature and time for each stage;
8.Touching back to control interface. Touching button to start temperature
control and freeze system to ensure the sample's temperature is changed
following setting values. In drying process, stage one is pre freezing stage.
The sample will be frozen to below Eutectic point, and make sure the
sample has been frozen totally;
9.When pre freezing stage finished, the process getting into drying
stages(stage two and later stages). Open vacuum pump, making vacuum
condition in chamber, to dry the sample. Make sure all the vent valves had
been closed;
10.When all stages finished, it means the drying process is over.*
Open the vent valve at first, then close vacuum pump, close temperature
control and freeze system. Finally, turn off the power and take off the power
plug. While the pressure balance between chamber inside and outside,
open the door, take out sample.
11.Defrosting the ice by heater. After all the ice removed, clean the dryer.**
*Note: Due to the specific characteristics of the material, and the
thickness of the material is different, the user should be tested to
determine the appropriate freeze drying process to ensure that the
material is completely dry.
**The outlet of the vacuum pump should be cover to avoid dust
entering.
Control system operation
The dryer's control system is operated through touch screen. Please read
the instructions carefully so as to use them correctly and keep them
properly for reference.
1.Operation attentions
1.In case of fire, explosion or machine damage, it is forbidden to use
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