Running Experiments
TA I
NSTRUMENTS
TGA 2950
3–16
Using the
Air Cool Option
You can program the system to air-cool the
furnace automatically at the end of the experi-
ment by selecting the air cool method-end
condition as one of your instrument parameters
(see the online help and documentation for
further information.). After the air cool is
activated, it will continue to run for the desired
time.
Before you start an experiment that uses the air
cool option, ensure that the supply valve from
the air source is open and that the pressure is
regulated to between 25 and 120 psig. Nitrogen
can also be used as a cooling gas.
If you are using the EGA furnace, Air Cool can be
used with the furnace closed. However, if the
temperature is above 500°C, the EGA furnace will
cool naturally until it is 500°C or less, then Air Cool
will begin.
Using a Purge Gas
You can control the sample atmosphere during
TGA experiments by connecting a purge gas to
the system. Purge gas is distributed separately
to two parts of the TGA: the furnace and the
balance chamber.
The balance purge maintains a positive pressure
in the balance chamber to prevent decomposi-
tion products from contaminating the sensitive
balance mechanism. The balance purge flows
from the balance chamber via two routes: down
the thermocouple tube and through an outlet in
the balance chamber to the right of the thermo-
couple tube. It then exits across the sample pan
along with the furnace purge.
NOTE:
Summary of Contents for TGA 2950
Page 20: ...TA INSTRUMENTS TGA 2950 xx ...
Page 22: ...Introducing the TGA 2950 TA INSTRUMENTS TGA 2950 1 2 ...
Page 36: ...TA INSTRUMENTS TGA 2950 Installing the 2950 2 2 ...
Page 90: ...Running Experiments TA INSTRUMENTS TGA 2950 3 24 ...
Page 92: ...Technical Reference TA INSTRUMENTS TGA 2950 4 2 ...
Page 112: ...Technical Reference TA INSTRUMENTS TGA 2950 4 22 ...
Page 136: ...TA INSTRUMENTS TGA 2950 Maintenance and Diagnostics 5 24 ...
Page 142: ...Appendix B B 4 TA INSTRUMENTS TGA 2950 ...
Page 152: ...Appendix B B 14 TA INSTRUMENTS TGA 2950 Figure B 2 Figure B 3 ...
Page 153: ...TA INSTRUMENTS TGA 2950 B 15 Hi ResTM Option Figure B 4 Figure B 5 ...
Page 169: ...TA INSTRUMENTS TGA 2950 B 31 Hi ResTM Option Figure B 7 Figure B 8 ...
Page 188: ...Appendix B B 50 TA INSTRUMENTS TGA 2950 Figure B 11 Sensitivity Setting Too High ...
Page 205: ...TA INSTRUMENTS TGA 2950 B 67 Hi ResTM Option Figure B 16 Figure B 17 ...
Page 211: ...TA INSTRUMENTS TGA 2950 B 73 Hi ResTM Option Figure B 22 Figure B 23 ...
Page 212: ...Appendix B B 74 TA INSTRUMENTS TGA 2950 Figure B 24 Figure B 25 ...
Page 214: ...Appendix B B 76 TA INSTRUMENTS TGA 2950 ...
Page 216: ...Appendix C TA INSTRUMENTS TGA 2950 C 2 ...
Page 218: ...Appendix C TA INSTRUMENTS TGA 2950 C 4 Figure C 1 Auto TGA ...
Page 236: ...Appendix D TA INSTRUMENTS TGA 2950 D 2 ...
Page 258: ...Appendix D TA INSTRUMENTS TGA 2950 D 24 ...
Page 264: ...Index TAINSTRUMENTSTGA2950 I 6 ...
