Freeze-dryer Epsilon 1-4 LSCplus
Freeze-dryer Epsilon 2-4 LSCplus
6 Operation
Version 04/2014, Rev. 2.13 of 01/12/2021
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Translation of the original operating manual
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6.7
Optional extensions and special equipment
Aeration, stoppering, storage
see also chapter 6.6.3.1 - "Creating a program", Button ">>more"
This option is available only in combination with the PGMplus programmer
module and if the freeze-dryer is equipped with an automatic aeration valve
and a hydraulic shelf movement system. It offers automatic sealing of the
product vials with pre-inserted rubber stoppers under partial vacuum and
subsequent storage on the shelves under defined conditions as an integral
part of a freeze-drying program.
Pressure increase test
see also chapter 6.6.3.1 - "Creating a program", Button ">>more"
The pressure increase test can only be performed with the
→
double-
chamber method
. During the pressure increase test, the intermediate valve
prevents the flow of steam from the drying chamber to the ice condenser so
that the water vapour of the
→
sublimation
cannot flow off. The result is a
more or less distinct pressure increase that is measured in the product
chamber. The pressure increase test is used as a criterion for the automatic
switching from the main drying phase to the final drying phase as well as
for identifying the end of the process.
Gas injection with a proportional valve
see also chapter 6.6.1.3 - " Main window "Options"", section "General"
If the freeze-dryer is equipped with a proportional gas injection valve, the
method that is to be used for vacuum control can be preselected. The
method can be saved together with a recipe.
Improved cooling rate (fast freezing)
Refrigeration unit 1 is used for cooling the ice condenser. Refrigeration
unit 2 cools the heat transfer fluid that is used for controlling the
temperature of the shelves. If the device option "Improved cooling rate" is
activated (see chapter 6.6.1.3 - " Main window
"Options""/Administration/Device options), the ice condenser refrigeration
unit will be used during the "Freezing" phase to support the cooling of the
heat transfer fluid. This enables higher freezing rates.
This option is only available for freeze-dryers of the Epsilon 2-6D LSCplus
and Epsilon 2-10D LSCplus type.
Inertisation
see also chapter 6.6.1.3 - " Main window "Options"", section "General"
If products containing solvent are dried in an oxygen atmosphere, explosive
mixtures may form. In order to dry these types of products, the freeze-dryer
must be equipped with a door-controlled inertisation system that uses
nitrogen or another inert gas.
