TA I
NSTRUMENTS
TGA 2950
B–53
Hi-Res
TM
Option
can be used to customize a method for a par-
ticular material by allowing different ramp and/
or isothermal segments to be used for each tran-
sition region without regard to specific tempera-
ture limits. Abort segments can be used to
control data storage so that file size is minimized
by turning off storage or increasing sampling
interval during baseline sections of a scan.
Abort segments provide a convenient mecha-
nism for shortening experiments after the data of
interest has been collected. For example, if a
heating ramp is used to analyze a material which
has two weight losses and the only data of
interest is the percent weight loss during the first
transition, then an abort segment can be used to
terminate the ramp after the beginning of the
second weight loss by specifying a “%” limit
condition. This is particularly useful for Hi-
Res
TM
ramps because the reduced heating rate
during a weight loss causes the majority of the
transition to occur during a very narrow tem-
perature range, making termination by final
temperature difficult to predict.
Stepwise
Isothermal Heating
Another useful TGA technique which can be
implemented with abort segments is transition-
controlled stepwise isothermal heating. This
process consists of heating a sample via a ramp
segment until a certain rate of weight change is
detected, and then switching to an isothermal
segment to hold constant temperature until the
transition has completed. Then the sample
heating is continued until the next transition is
detected, whereupon, isothermal holding is
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 ...