Appendix B
B–12 TA I
NSTRUMENTS
TGA 2950
The most useful maximum heating rates are 10
to 50
°
C/minute for positive resolution settings.
However, other values are perfectly acceptable
when required by the needs of the experiment.
Use lower heating rates when transitions are
very closely spaced in temperature, or if the
sample material reacts very rapidly. A higher
heating rate conventional ramp can be used to
skip over baseline sections in order to shorten
experiment time. Generally speaking, you no
longer need to use very slow heating rates, less
than 5
°
C/minute, because the dynamic rate Hi-
Res
TM
technique automatically reduces heating
rate with the accompanying improvement in
resolution.
There are no special method programming
constraints on Hi-Res
TM
ramp segments. They
may appear anywhere in a method that a normal
ramp could appear. The maximum ramp rate,
resolution setting and final temperature of an
executing Hi-Res
TM
ramp may be changed via
the Modify Segment feature on the controller.
Selecting the resolution setting is covered in
greater detail in the Advanced Hi-Res
TM
Tech-
niques section.
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