Bruker IFS 125M User Manual

87
Bruker Optik GmbH IFS 125M User Manual
Maintenance 6
6.5 Evacuating detector
Where are the detectors
located?
Under the detector hoods
What detector type has to
be evacuated?
Liquid-nitrogen cooled MCT and InSb
detectors
When has the detector to
be evacuated?
If the detector hold time
a
considerably
decreases (i.e. a hold time of less than
70% of specified hold time).
Most liquid-nitrogen cooled detectors are
mounted in re-pumpable vacuum dewars
(except for those which are permanently
sealed). Usually, the detector dewar holds
its vacuum for several months.
a. The hold time indicates how long the cooling effect of the liquid nitrogen lasts.
How is it indicated that the
detector has to be evacu
-
ated?
• Condensation water exists on the detec-
tor outer surface.
• Outer surface of detector is iced.
• Broad absorption around 3,250 cm
-1
(ice
band)
Tools required: • Turbo molecular pump/oil-free high-vac-
uum pump
• Vacuum adapter
More details are described in
chapter
6.5.1.
Table 6.13: Detector features

Bruker IFS 125M Specifications

General

Brand	Bruker
Model	IFS 125M
Category	Laboratory Equipment
Language	English