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Bruker Optik GmbH IFS 125M User Manual
Maintenance 6
6.5.2 Evacuating procedure
The following cross-section of the adapter aims to better illustrate the evacuating proce-
dure.
i
Before evacuating the dewar, the dewar must not contain any more liquid nitrogen. The
dewar temperature must be about room temperature (maximum 60°C).
Evacuating the dewar takes several hours. Therefore, it is recommended to evacuate
the dewar over night. The final pressure in the dewar has to be less than 10
-5
hPa.
Definition
A Coupling nut
B O-ring retainer
C O-ring
D Union nut (to remove the valve closure of
the detector dewar)
E Connecting piece for vacuum pump
F Vacuum adapter
G Washer and O-ring packing
H Knob
Table 6.15: Parts of vacuum adapter
closed
open
A B C D E F G H
Figure 6.4: Vacuum adapter, cross section