Running Experiments
TA I
NSTRUMENTS
TMA 2940
3–18
Using a Purge Gas
You can control the sample atmosphere during
TMA experiments by connecting a purge gas to
the system. You can purge the system using
inert gases or reactive gases such as air and
oxygen. The following gases can be used:
Helium (recommended)
Nitrogen
Oxygen
Dry, filtered air (to keep moisture, dirt, oil,
and debris out of the system).
If an inert atmosphere is needed, nitrogen gas
shoule be used. Close the furnace and purge the
system with nitrogen for ten minutes. Then
switch to helium gas for the experiment, if
desired. To ensure an
inert
environment for
your sample, a purge rate of 100 mL/min is
suggested. Enter the purge gas and flow rate
information using Instrument Control function,
see the online documentation
for details. The
sample purge connection is located on the right
side of the back of the TMA. See Chapter 2 for
installation details.
Suggestions
The following guidelines are suggested when
purging the system:
Pass the purge gas through a dryer
whenever you are working at subambient
temperatures in order to remove any
moisture in the gas itself.
Summary of Contents for TMA 2940
Page 18: ...TA INSTRUMENTS TMA 2940 XVIII...
Page 20: ...Introduction 1 2 TA INSTRUMENTS TMA 2940...
Page 34: ...Introduction 1 16 TA INSTRUMENTS TMA 2940...
Page 36: ...Installation TA INSTRUMENTS TMA 2940 2 2...
Page 62: ...Installation TA INSTRUMENTS TMA 2940 2 28 Figure 2 17 Isolation Transformer Cable Connections...
Page 66: ...Installation TA INSTRUMENTS TMA 2940 2 32...
Page 138: ...Using Your Options TA INSTRUMENTS TMA 2940 4 48...
Page 140: ...5 2 TA INSTRUMENTS TMA 2940 Technical Reference...
Page 150: ...5 12 TA INSTRUMENTS TMA 2940 Technical Reference...
Page 152: ...Maintenance and Diagnostics TA INSTRUMENTS TMA 2940 6 2...
Page 168: ...Maintenance and Diagnostics TA INSTRUMENTS TMA 2940 6 18...
