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The RsTemp software determines the optimum heating temperature for measuring moisture content with
the MS/MX/MF/ML.
The graph shown above shows an example in which sodium tartrate dihydrate is measured with RsTemp.
Horizontal axis represents elapsed time. Moisture content is measured while the temperature is raised
20 ℃ every 5 minutes.
0-5 min.: 100 ℃, 5-10 min.: 120 ℃, 10-15 min.: 140 ℃, 15-20 min.: 160 ℃, 20-25 min.: 180 ℃, 25-30
min.: 200 ℃.
( Starting temperature = 100 ℃; Interval temperature=20 ℃; Interval time = 5 min.)
The red curve shows the change of moisture content and corresponds with the vertical axis at the left. This
line inclination changes with changes in the heating temperature.
The green curve plots the inclination of moisture content curve (red curve) at 1-minute intervals (%/min.)
and its unit is indicated by the vertical axis on the right. In other words, the green curve shows the results
of primary differential of red curve (function) by time (t)=dM (t)/dt. (Temperature T remains unchanged in
each heating temperature zone).
"Starting temperature", "Step temperature" and "Step time" can be changed when needed. For furthe
information, refer to RsTemp_ReadMe.
Measured and calculated results are displayed in tables below the graph. From the top column to bottom:
Temperature:
Heating temperature, which is automatically set
Moisture (%):
Moisture content rate
Rate (%/min.):
Change of moisture content per minute
Judgment
rates the suitableness of heating temperature for moisture content measurement using an
alphabetical rating (A, B, C, D, E, and F). A temperature rated “A” would be the temperature most suitable
for measurement of moisture content.
This judgment is determined from the measurement results by evaluating the stability (inclination) of the
moisture content at each temperature and the primary differential value (Rate (%/min).
While RsTemp determines an appropriate temperature from these measurements and calculations, testers
must also observe the sample during measurement. It is important to consider any melting, burning, odo
or decomposition when deciding the optimal temperature.
3. Automatic determination of heating temperature by RsTemp
■Application/B.Data analysis/2. RsFig
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