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OHAUS MB62 Manuel D'instructions page 35

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MB62 Instruction Manual
• Estimate moisture content of the sample.
• Determine the decomposition temperature of the sample by experiments.
• Compare the measurement results with the reference method if one exists.
• If an excessive amount of moisture is involved, lower the drying temperature. If the
experimental results are too low, the drying temperature was possibly too low or the
drying time too short.
With samples which have a high moisture content, it is possible to shorten the
measurement time by selection of the step or rapid drying program. Here, the greatest
part of the existing moisture is separated at an elevated temperature.
The drying temperature is then lowered
and kept constant until the end of drying.
The excessive temperature is used for
rapid vaporization of the moisture, but
the effective sample temperature does
not exceed the boiling temperature of the
liquid (cooling effect through endothermic
vaporization). In certain cases, local
heating and decomposition could still occur
at the sample surface.
5.2.1.3. Switch-off criterion (SOC)
Switch-off criterion defines when the instrument should end the drying.
MB62 contains three types of Switch-off criterion:
EN-29

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