TANNER Scientific TN50, Operating Instructions Manual

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Operating Instructions – TN50
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9.2 QUICK FREEZE POSITION
[only applicable to instruments equipped with this feature]
For convenience of the user, the cryostat TN50 can be equipped with a quick freeze
shelf with two positions located in the object freezing shelf. Upon activation the
installed peltier element will cool down the two quick freeze position to approximately -
55 °C.
The quick freeze shelf can be activated as described in section 7.2.
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The default setting for automatic deactivation of the quick freeze is
set to 30 minutes. The timer for automatic deactivation can be set
by an authorized service technician.
9.3 HEAT EXTRACTOR
For a more rapid freezing process with
improved structural preservation of tissues
and a flattened block surface, the
instrument is equipped with a heat
extractor.
Apply the heat extractor on top of the
specimen during the freezing process.
Heat extractor
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Use of the heat extractor can lead to changed orientation of the
specimen in the frozen block, especially for smaller samples.
If precise orientation of the specimen is required, the freezing
procedure should be performed without the heat extractor.