DYNAVAC NovaDryer-DHF400 Manuel d'installation et d'utilisation rapide - Page 7
Parcourez en ligne ou téléchargez le pdf Manuel d'installation et d'utilisation rapide pour {nom_de_la_catégorie} DYNAVAC NovaDryer-DHF400. DYNAVAC NovaDryer-DHF400 17 pages. Vacuum freeze dryer
Imprimer la pagePart 3. Basic knowledge about this freeze dryer
1. There are 5 working stages in the freeze drying process.
It takes a freeze dryer 24‐30 hours to finish the complete process including:
Pre‐freeze, Cold Trap Cooling, Vacuum Pumping, Drying and Temperature keeping.
Total freeze drying time (24‐30 hours) depends on sugar contents, oil contents, water
contents, size of the materials, and room temperature.
If ‐45C deep freezer is available, please use it to pre‐freeze the materials for about 9
hours so the freeze dryer can skip the pre‐freeze stage (set pre‐freeze time: 1 minute)
to reduce freeze dryer's total working time to about 18 hours (Cold trap cooling
needs to be started before the pre‐frozen materials are loaded into the chamber to
cool the chamber to low temperature requested for the next stage‐vacuum pumping)
2. The working stage indicator keeps flashing in each stage all the time. This flashing is normal and does not mean any
alarm.
3. There are 2 control modes for this freeze dryer: Vacuum Control and Program Control.
Both modes share the same settings in the first 3 stages (pre‐freeze, cold trap cooling and pre‐vacuum) but have
different settings at drying stage.
Vacuum Control mode: Parameters at drying stage is preset and the user is not allowed to modify parameters.
Program Control mode:Parameters at drying stage is not preset and the user is allowed to modify parameters
according to different materials.
Program Control Mode is recommended because this mode can be used for all the materials while Vacuum Control
Mode is not suggested for some materials such as milk and flowers.
4. A parameter setting chart is offered by us according to our tests on different materials. The user can try to modify
it after the best parameter setting is found after some trial running.
5. After started, the freeze dryer and vacuum pump can run automatically according to the set parameters.
6. The vacuum pump does NOT start at the first 2 stages (pre‐freeze, cold trap cooling). It will be started
automatically from vacuum pumping stage and will keep running in working status until end of freeze drying
(except it is stopped by the user).
7. After started, the vacuum pump will initially be a little noisy (about 60‐70dB),
together with white smoke discharge from outlet of the vacuum pump. This will
last for a few minutes. It is normal.
After that, noise will be reduced and white smoke will disappear.
It is normal that the vacuum pump feels hot all the time.
8. There are 3 working status displayed on the main menu:
Normal Status
Indicating the freeze dryer is working
in good condition.
www.dynapumps.com.au • 1300 788 579 • [email protected]
Vacuum Alarm
Refer to point 9 for solution:
"How to Eliminate Vacuum Alarm"
Please Remove Materials
Refer to 8‐2: