![background image](http://html2.mh-extra.com/html/aandd/ms-70/ms-70_user-handbook-manual_3073800010.webp)
-
9
-
B. Measurement
■
Introduction to moisture analyzers/B. Measurement
No.
Question
Answer
1
What is the benefit of being
able to see the inside of the
analyzer during heating?
Being able to see inside the analyzer allows the user to
comprehend the measurement conditions and provides
assurance. Samples that may be scorched or burned from
excess heating can partially vaporize from decomposition or
combustion instead of evaporation, which invalidates the
results. Therefore, it is very important for users to observe the
sample through progress window to ensure the results are
accurate.
Because the sample can be directly observed during heating,
this feature is particularly useful when determining the optimal
heating conditions for new samples.
2
What is the minimum
measurement time?
It depends on material and moisture content. However, the 400
W halogen lamp of the MS/MX/MF/ML can heat pans from
room temperature to 200 ºC in only 2 minutes.
Also, the SHS
TM
sensor on analytical balances measures very
precisely, so smaller samples can be measured. With an
appropriate heating temperature and sample mass,
measurement can typically be completed within a few minutes
to 20 minutes.
Thanks to the faster heating rate and smaller required sample
size, the MS/MX/MF/ML heating and measurement times are
shorter compared to conventional infrared heating.
3
Does the analyzer display the
true sample temperature?
The temperature displayed by the analyzer during heating is
the temperature of the pan. In other words, when the sample is
spread evenly, it is the sample temperature. However, when the
sample is placed unevenly or has hard surface membrane, the
displayed temperature is the surface temperature of the
sample.
MS/MX/MF/ML does not have the sensor placed directly over
the pan. During design of the analyzer, two sensors, one above
the pan and one embedded in the analyzer, measured
temperature. A program uses the correlation of these sensors
to accurately calibrate and display the correct temperature.
Users of the MS/MX can calibrate the temperature using the
optional calibrator to compare the display and actual
temperature.