Freeze-dryer Epsilon 2-10D LSCplus
6 Operation
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Version 07/2022, Rev. 3.0 of 20/07/2022
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Translation of the original operating manual
Special equipment: Preselection of the aeration medium
If the freeze-dryer is equipped with an automatic aeration valve and
automatic valves for media selection, this dialog box can be used to
preselect the medium that is to be used for the aeration medium requests
during the execution of the particular program.
Fig. 65: Dialog box "Preselection of aeration medium"
If the vacuum control system of the freeze-dryer uses a regulated gas
admission (injection), the preselected medium will be used for this purpose.
If the freeze-dryer is equipped with the "Aeration, Stoppering, Storage"
option, the preselected medium will be used for the aeration up to
stoppering (backfilling) as well as for the final aeration up to atmospheric
pressure.
The following media preselection settings are possible:
• Air: Preselects the media connection "Air".
• Inert gas: Preselects the media connection "Inert Gas".
• Automatic: Automatic media connection preselection depending on the
chamber pressure and stoppering status of the product vials:
– Chamber pressure ≥ 950 mbar or product vials already sealed by
way of "Aeration, Stoppering, Storage": Preselection of the media
connection "Air".
– Chamber pressure < 950 mbar and product vials not yet sealed by
way of "Aeration, Stoppering, Storage": Preselection of the media
connection "Inert gas".
As a result, during automatic aeration, stoppering, and storage, backfilling
can be performed automatically with inert gas and the subsequent aeration
of the chamber up to atmospheric pressure with air.
Special equipment: Gas injection with a proportional valve (4)
See chapter 6.7.1.3 - "Main window "Options"", section "Special equipment:
Gas injection with a proportional valve"
