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7. Tips on how to ensure accurate measurements
Points to remember when conducting multiple measurements in succession
Placing a sample onto a sample dish which is already warm may cause moisture from the sample to
evaporate before measuring is begun and cause errors to occur in measurement. Always be sure to
use a cool sample dish when performing a second or subsequent measurements.
You should also take care to allow an even amount of time to elapse between measurements, as
errors in measurement may occur if the temperature of the internal scale of the unit does not remain
at a constant level.
* Two sample dishes and two sample dish handlers are included.
Use of sample dishes and aluminum foil sheets
It is impossible to obtain accurate measurements if residue from the sample last measured remains
on the sample dish. To avoid such problems, either wipe the sample dish clean of any dirt or soil (see
“15. Maintenance” on p. 64 for further instructions) or use disposable aluminum foil sheets to protect
against residues, soil, or dirt.
* Twenty disposable aluminum foil sheets are included with the unit.
Quantity and placement of powdered, particulate and viscous sample materials
The easier it is to heat the surface of a sample material, the easier it is for projecting portions of the
material or for material at the top of a mound of material to become burnt. If the material is placed in
a mound on the dish or if the material is not flat and evenly laid out, this is likely to happen, thus
making it impossible to obtain accurate measurements.
Note that while the precision of measurement improves the more flatly and evenly samples are
placed and the higher the amount of sample material used, the quantity of sample material used is
too great if the surface becomes burned before lower layers are fully dried.
Always be sure to lay out samples flatly and evenly as indicated in the diagram below.
Measuring liquid samples
Virtually all liquid materials will coagulate after being dried, and when working with such materials
they should be placed on the provided sheets of aluminum foil. Note that these aluminum foil sheets
are water-permeable, thus making it possible to obtain wide and even placement and making them
effective for use in shortening measuring times and obtaining accurate measurements.
Depending on the sample in question, the use of sand to speed up drying (Silica sand or ocean sand
with a mesh of 20 or so) may be even more effective.
Proper placement
Incorrect placement
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