Freeze-dryer Alpha 1-4 LDplus
Freeze-dryer Alpha 2-4 LDplus
Version 11/2006, Rev. 2.2 of 17/10/2016 • sb
Translation of the original operating manual
Set values for the "freezing" phase
Timer
The timer is used to define the duration of the phase. Settings between one
minute and 200 hours are possible. If, when starting at 00:00 h:m, the
"down" key is pressed, the symbol will appear. It indicates that the timer
is deactivated and that the freeze-dryer is in the continuous mode.
After the preselected time has elapsed, the system enquires as to whether
the next phase is to be started.
It is possible to specify an automatic phase change from "Freezing" to
"Warm-up vacuum pump" (seechapter 6.5.3.4 - "Options" / Settings /
Automatic phase change).
Set values for the phases "Main drying" and "Final drying"
The set values for the "Final Drying" phase are only available if the
optional pressure control system is installed.
Timer
The timer is used to define the duration of the phase. Settings between one
minute and 200 hours are possible. If, when starting at 00:00 h:m, the
"down" key is pressed, the symbol will appear. It indicates that the timer
is deactivated and that the freeze-dryer is in the continuous mode.
It is possible to specify an automatic phase change from "Main drying" to
"Final drying" (seechapter 6.5.3.4 - "Options" / Settings / Automatic phase
change).
Vacuum
For this set value, the optional vacuum control system must be installed.
The range of possible values goes from 6.1 mbar to 0.0010 mbar,
converted into steps of 1°C in accordance with the vapour pressure curve
for ice and water (see chapter 2.2.1 - "General information on freeze-
drying").
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