7 | Operating Pro control panel
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Operation Manual Lyovapor™ L-200/L-200 Pro
Setting
Option
Explanation
[Pressure differ-
ence limit]
Enter value
Specifies the difference between
the two sensor readings below
which the end point is reached.
The threshold must be greater
than the offset value from the
vacuum test. See Chapter 7.8.4
"Determining offset value",
page 63
[Term]
Enter value
Specifies the length of time for
which the pressure difference
test is to be carried out.
[Continue]
Yes/No
Yes : the method switches to the
next phase.
No: the phase is ended when the
set levels are reached.
[Message]
Yes/No
The control panel shows or does
not show a message as soon as
the pressure difference test is
passed.
7.8.3
Temperature difference test
NOTE
The temperature test is successfully completed if all drying shelves are below the
threshold.
The samples on a drying shelf have different drying times. Take account of the
different drying times in the
[Duration]
setting.
The temperature difference test establishes the difference between the readings
from the temperature sensor for the heatable shelf and the temperature sensor in
the sample. If the difference between the two sensor readings is below a threshold,
the freeze-drying phase can be ended.
Navigation path
➔
Method
Precondition:
R
The heatable shelves are fitted in the rack. See Chapter 8 "Operating top-mount
drying racks", page 69
R
u
Place the optional temperature sensor in the sample.
u
Navigate to the
[Method]
menu via the navigation path.
u
Tap the name of the method that you wish to edit.
ð
The control panel highlights the selected method in green.
