TA Instruments TMA 2940, Руководство оператора

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Using Your Options
TA I
NSTRUMENTS
TMA 2940 4–26
Sample Preparation
The following method is used to prepare and
load the dilatometer sample:
The dilatometer filling medium must be kept dry.
Store it in a desiccator when it is not being used.
If the sample has become contaminated through
long exposure to humidity, dry it in a vacuum oven
at 200
o
C for one hour.
1. Fill the dilatometer vial one-third full with
the filling medium found in the accessory
kit.
2. Use a tamping rod to lightly pack the filling
medium.
3. Select a sample that is small enough to
easily fit inside the dilatometer vial without
touching the walls.
4. Place the sample on the filling medium in
the center of the vial. Make sure that the
sample does not touch the vial walls.
5. Add more filling medium to the vial until it
is approximately three-quarters full, then
tamp down the filling medium hard with a
tamping rod. The level will be compacted.
Continue adding filling medium and tamp it
hard until the vial remains three-quarters
full. Mark this position on the vial.
6. Check the filled and packed dilatometer vial
from all angles to make sure that the sample
does not show (see Figure 4.9).
NOTE: