MS-70 / MX-50 / MF-50 / ML-50
17
No good
Good
5.3. Proper Operation for Precision Measurement
5.3.1. Operation of the sample
Use a proper sample quantity. If the quantity is small, precise results may not be possible.
If the moisture content of the sample (example: plastic) can be estimated that is less
than 1%, the mass of moisture is not enough for the measurement, when measuring
light sample, the result may not be accurate. Consider the following sample mass for
the measurement.
An estimate of moisture content
1%
0.5%
0.1%
Necessary mass for measurement
2 g at least
5 g at least
20 g at least
If the measurement is repeated, maintain the same sample quantity.
Crush grain samples to a small, uniform powder for a quick drying process.
Spread the sample as evenly as possible.
The analyzer is designed to measure the moisture content
of the sample by its weight change. If the sample includes
volatile matter, it may vaporize during drying causing a measurement error.
When measuring a liquid or liquid state sample that may make a film on the surface,
we recommend you use a glass fiber sheet (AX-MX-32-2).
5.3.2. Operation of the analyzer
Press the
RESET
key to display the zero value before
each measurement.
Check that the displayed sample weight is stable before
measurement. Press the
START
key to start a
measurement.
Select the proper Analysis Mode to finish a measurement.
Use the change of moisture content per one minute [%/min]
that is displayed during measurement as a reference value.
The analyzer needs a pre-heating process before measurement. When measuring
samples repeatedly or continuously, the first result is always different from the others.
The pre-heating process is as follows: Put a sample pan, instead of a sample, on the
pan. Press the
START
key to heat it. The analyzer temperature becomes equilibrium.
Use a sample on the sample pan that has cooled to room temperature. When a sample
is put on a hot sample pan, the moisture content is diffused before measurement, and
precise results are not possible. We recommend you use multiple sample pans.
Do not pile up sample pans during a measurement.
Avoid drift and vibration of air conditioners. It may cause "measurement error" and
"unstable value". In particular, because MS-70 is sensitive instrument, it is
necessary to consider these influences.
When the difference between ambient temperature and sample temperature is
small, it may cause temperature control error.
Example: If the heating temperature is crossed to the range of 30°C and 50°C, it is
affected by an room temperature.
Check the activation of the halogen lamp with the operation indicator.
Example: If low heating temperature is set, the brightness of halogen lamp becomes dark.
0.000
g
5.43
%
2.02
%/min
Result display
Check the activation
with blinking
