PerkinElmer TGA 4000, Installation And Hardware Manual

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60 . TGA 4000 Installation and Hardware Guide
The gas atmosphere should be pure (99.9% minimum), especially if you use nitrogen. There
should be no trace of oxygen as this could lead to unwanted reactions. The gas must be
dry.
The degradation byproducts from the sample leave the instrument directly via a small hole in
the furnace cover. These byproducts could be harmful, so use adequate suction such a fume
hood. There is some condensation of less volatile products on the cold spots of the analyzer:
the lower side of the cover and the upper inner side of the cooling jacket. These spots can
be cleaned easily with a suitable solvent. Condensation may also occur on the top inner side
of the cooling jacket. To prevent this, use the porous ceramic furnace cover to absorb the
less volatile byproducts. When necessary, this ring should be changed.
Loading the Sample into the TGA 4000
Use the following procedure to load samples or remove samples:
1. Using tweezers, remove the stainless steel cover off of the top of the analyzer. Place it
on the stainless steel ring surrounding the opening to the furnace.
2. Place the sample inside the sample pan.
3. With tweezers, carefully place the sample pan with sample onto the sample holder and
make sure that the pan is centered.
4. Replace the lid.