Martin Christ Beta 2-8 LSCplus - Manual (Page 62)

Beta 1-8 LSC&
Beta 2-8 LSC&
6 Operation
62
Version 04/2013, Rev. 1.1 of 16/12/2013 • sb
Translation of the original operating manual
Fig. 57: Representation of a freeze-drying process
Program sections
When the programmer module executes a freeze-drying process, it
executes the various sections that were created one after the other until the
last section is completed.
Within the various sections, the system calculates linear ramps for the
temperature and vacuum. These ramps start with the set value of the
previous section and end with the set value of the current section.
As a result, there is not abrupt change of the set value from section to
section, but a steady adaptation.
Fig. 58: 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.
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