Freeze-dryer Epsilon 1-4 LSCplus
Freeze-dryer Epsilon 2-4 LSCplus
6 Operation
66 / 152
Version 07/2022, Rev. 3.0 of 20/07/2022
• sb
Translation of the original operating manual
Procedure:
• In the main window "Manual", open the dialog box "Set values:
view/edit" via the corresponding button and then select the button
"Leakage test".
• Edit the values "Duration test" (value between 10 min and 18 h) and
"Chamber volume" (value see technical data), confirm the new values
and return to the main window.
• In the main window "Manual", select the button "Operating mode:
select/start"
– "Standard unit test".
• Select "Leakage test" and start the test via the "Run" button.
The parameters for the leakage test have been developed by Martin Christ
Gefriertrocknungsanlagen specifically for freeze-dryers. In a first step,
these parameters (vacuum, ice condenser temperature) must be reached.
It is not until the conditions are fulfilled that the pressure control valve
closes. Then, the actual leakage test is performed in a second step.
The result will be indicated by way of a dialog box.
If the freeze-dryer is equipped with the LPCplus SCADA software, the
results will be documented in the event list.
Evaluation:
The leakage rate that is calculated after the test provides information
concerning the tightness of the system. If the threshold value is not
reached, the test has been passed. If it is exceeded, the test has been
failed.
Capacity test -30°C (3)
NOTE
The capacity test -30°C is intended for units with one single-stage and
one double-stage refrigeration system.
The capacity test -30°C is a freeze-drying program/ for verifying the ice
condenser capacity (when the shelves are cooled to -30°C in the "Freezing"
phase). For this purpose, the shelves must be loaded.
Procedure:
• Load the shelves evenly with water in dishes for the test. The water
quantity must be 2/3 of the maximum ice condenser capacity that is
specified for the freeze-dryer.
• In the main window "Manual", select the button "Operating mode:
select/start"
– "Standard unit test".
• Select "Capacity test -30°C" and start the program via the "Run" button.
In the "Freezing" phase, the shelves are cooled to -30°C. The parameters
for the subsequent "Main drying" and "Secondary drying" sections have
been configured in such a way that the water will be completely sublimated
out of the dishes and bound on the ice condenser after 24 hours.
