7 | Operating Pro control panel
Büchi Labortechnik AG
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Operation Manual Lyovapor™ L-300/L-300 Pro
Navigation path
➔
Start
Precondition:
R
The instrument has been prepared.
u
Fit a top-mount drying rack. See Chapter 8 "Operating top-mount drying racks",
page 81.
u
Load the top-mount drying rack with frozen samples.
u
Navigate to the
[Start]
menu via the navigation path.
u
Tap the function
[Manual]
on the function bar.
u
Enter the required settings for the process parameters.
u
Tap the function
[Start]
on the function bar.
ð
The freeze-drying process starts.
ð
The background color of the
Start
menu changes from white to black.
ð
The status bar shows a clock counting up and the status Manual Drying.
ð
The system evacuates to the set pressure.
Shutting down
The instrument is shutting down.
The aeration valve and the drain valve
are closed.
The status bar shows the remaining
time.
7.10.3 Editing parameters while the process is running
Navigation path
➔
Start
Precondition:
R
The process has been started.
u
Navigate to the
[Start]
menu via the navigation path.
u
Using the navigation control, navigate to the parameter that you wish to change.
u
Tap the function
[Edit]
on the function bar.
ð
The control panel shows a dialog box with a numeric input box.
ð
The control panel highlights the selected parameter in white.
u
Enter the value in the numeric input box.
u
Tap the function
[Save]
on the function bar.
ð
The setting is saved.
ð
The dialog box closes.
7.10.4 End point definition
NOTE
Take account of the result of the leak test in settings for
[Pressure limit]
and
[Duration]
.
To determine the end point of the freeze-drying process, a pressure rise test can be
carried out manually while freeze-drying is in progress.
