RADWAG MAX 60 Moisture Analyzer - Manual (Page 63)

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In case option Optional is enabled the
user has to enter required sample mass
and tolerance value for the material to be
weighed / dried.
If sample mass option is enabled, the moisture analyzer displays prompts for the
user on placing a required size of a sample to be tested on the drying pan. If a user
neds to dry a sample with different mass, then drying process can be started even if
the mass does not comply with set parameter criterion.
In case option Obligatory, is enabled the
user has to enter required sample mass
and tolerance value for the material to be
weighed / dried.
After selecting this option, the moisture analyzer displays prompts for the user on
placing a required size of a sample to be tested on the drying pan. In Mandatory
option the drying process will not start unless the mass of a sample to be tested
complies with the parameter settings.
10.9. Setting a corrective coefficient
Coefficient correcting drying temperature
Materials of dark colours are affected by the phenomenon of heat absorption. In
such case the tested sample can be overheated, i.e. when drying a dark
coloured sample in a temperature 120
o
C, the sample may absorb heat and heat
up to approximately 135
o
C. Therefore, it is necessary to determine the
coefficient correcting the drying temperature. The process requires using a
control thermometer with a probe (available as accessories for the moisture
analyzer).
Means of determining the corrective coefficient:
1. Program all parameters of a drying process.
2. Spread evenly a sample to be tested on the drying pan and start drying
process.
3. On completion of the drying process note down the drying time
4. Prepare another sample of the same material and spread it evenly on
the drying pan. Prepare a thicker layer of the sample to be tested.
5. Insert the probe of the control thermometer into the tested sample,
press ON/OFF button on the control thermometer
6. Start drying process
7. Monitor the temperature values displayed on the moisture analzyer and
the control thermometer
8. After the time value specified for the first tested sample check both of
the temperature values.
9. Calculate the corrective coefficient using an equation:
T
measured
– T
set
--------------------------------------------------------
T
set