Martin Christ Epsilon 2-10D LSCplus - Manual (Page 72)

Freeze-dryer EPSILON 2-10D LSCplus
6 Operation
72
Version 04/2013, Rev. 1.5 of 16/12/2014 • sb
Translation of the original operating manual
Fig. 63: Graphical representation of the course of the control set value
In order to protect the product, a safety pressure value can be entered in
every drying section.
Conditions for switching to the next section
For all of the program sections to be executed automatically, certain
switching conditions must be fulfilled at the end of each section. If these
conditions are not fulfilled, e.g. due to incorrect set values, a corresponding
process message will be displayed and the section will be extended.
Ice condenser temperature: This value is checked only when the system
switches from freezing (loading) to drying. The ice condenser temperature
must be -40°C.
Vacuum: This value is checked only during the drying phase. The actual
vacuum can differ from the set value by 20% maximum. In the case of a set
value of 0.001 mbar (final vacuum), there will be no check. In order to reach
the vacuum as quickly as possible, a section time of 1 minute can be
preselected. Since this is not possible in practice, a process message will
be issued for the first time after 15 minutes in this case.
T shelf: This value defines the permissible deviation of the shelf
temperature from the set value. At the end of the section, the actual
temperature of the shelves (in the case of WST shelf 1) will be compared to
the set value. If the shelf temperature is beyond the permissible range, the
section will be extended until the deviation is within the permissible range.
T product: This value defines the permissible deviation of the product
temperature (measured by product sensor 1) from the set value. During the
freezing phase, the product temperature may exceed the set value by the
defined value. In the drying phase, the system will provide a signal to the
user if the actual value lies below the set value by more than the
permissible deviation.
LyoControl-Rx (option with LyoControl LCplus): The value LyoRx defines
the minimum permissible value of the LyoControl sensor (measured by the
LyoControl sensor 1) during the drying phase. If the actual value falls below
T/°C
t/h
1000
100
10
1
0.1
0.01
0.001
0.0001
+40
+30
+20
+10
0
-10
-20
-30
Pressure/mbar
Set value of the previous section
Course of the shelf temperature
control set value
Set value of the
current section
Previous
section
Current
section
Following
section