TA I
NSTRUMENTS
TGA 2950 3–17
The purge flow through the furnace is horizontal
to the sample (see Figure 3.4), permitting rapid
removal of decomposition products from the
sample environment.
Figure 3.4
Furnace Purge
You can choose nitrogen, oxygen*, helium, air, or
argon for your purge environment. Do not use
any other gases in the TGA 2950. See the
Chemical Safety section on page xv for further
details.
Do not use hydrogen or any other explosive
gas in the TGA 2950 furnace or the TGA 2950
EGA furnace. *Oxygen may be used as a purge
gas, but the furnace must be kept clean of
volatile hydrocarbons to prevent combustion.
Do not use any liquid in the purge lines.
Purge gas can be obtained from a pressurized
cylinder or an in-house supply source. Gas
supplied from an in-house source should be
passed through a sieve dryer to remove any
trace of moisture before it enters the TGA.
!
WARNING
!
WARNING
Running a TGA Experiment
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