Drying Temperature - KERN MLB50-3 Operating Instructions Manual

7.4 Drying temperature

Consideration should be given to the following influencing factors when setting the
drying temperature:
Sample surface:
Contrary to powdery and granular samples, fluid and spreadable samples have a
smaller surface that tends to transfuse heat energy.
The use of a glass fibre filter improves heat insertion.
Colour of the sample:
Pale samples reflect more heat radiation than dark samples and therefore require a
higher drying temperature.
Availability of volatile matter:
The better and faster water or other volatile matter is available, the lower the setting
for the drying temperature. If the availability of water is poor (e.g. in plastics), the
water must be calcinated at a high temperature (the higher the temperature, the
higher the water vapour pressure).
Similar results can be achieved using other humidity identification methods (e.g.
cabinet dryer) by experimental optimisation of the setting parameters such as tem-
perature, heating grade and shut-down criteria.
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