Christ Alpha 3-4 LSCbasic Operating Manual page 80

Freeze-dryer Alpha 3-4 LSCbasic
6 Operation
NOTE
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Fig. 55: Warning issued when the vacuum limit is exceeded
•
If the value is above the upper limit of the working range, the actual
value will be displayed as ">1 mbar" in the value window.
•
If the value is the lower limit of the working range or below this limit, the
actual value will be displayed as "<0.005 mbar" in the value window
while the set value is displayed as "MinV".
As a result of this setting, the pressure control valve remains
permanently open so that operation at the final vacuum of the freeze-
dryer is possible.
Pressure notification (3)
As an additional safety feature for controlling the vacuum during the freeze-
drying of solvents, an → alarm pressure level can be entered for every
freeze-drying section. This value must be within the working range of the
vacuum sensor.
This is only a passive safety feature. The user is responsible for taking the
appropriate measures.
Version 11/2018, Rev. 1.9 of 01/12/2021 • sb
Translation of the original operating manuel