Technical Reference
TA I
NSTRUMENTS
TGA 29504–4
Negative weight (tare imbalance) is limited to
150 mg in the 1 gm range, and to 15 mg in the
100 mg range. Range control is automatic.
During normal operation of the TGA, the sample
may evolve gases. To prevent back diffusion of
these liberated gases to the balance chamber, the
balance chamber is purged with an inert gas
(standard furnace = 40 mL/min, EGA furnace =
10 mL/min). An inert gas must be used to
prevent contamination or corrosion of the
balance.
Heating rate and sample temperature are mea-
sured by the thermocouple located above the
sample.
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