14 USER MANUAL
– to draw few samples from different points in a substance, mix them and draw a sample
from the mixed samples.
Sampling method depends on the object of a research. For quality purpose many
representative samples are analysed. In production control it is enough to assure
sampling repeatability, which enables to study a tendency.
While preparing and drawing, it is important that the sample does not absorb moisture
from the environment – it is advised that operation time is as short as possible.
If it is necessary to analyse more than one sample at the same time, the samples should
be closed in plastic bags or other isolated containers. Give attention that samples must
not lose moisture inside the container (the container should not consist of to much air, the
moisture condensed on the sides of the container should be mixed with the sample
again).
11.4 Tools requirements
Tools and instruments used in preparation process may affect measurement accuracy,
so it is advised not to use tools that transmit heat, as it makes the sample lose moisture
before analysis.
Use only special mills and pestles.
In case of liquids with consisting of solid materials use a glass mixer, a spoon or a
magnetic mixer.
11.5 Single-use pans
To analyse the moisture, put a sample on a single-use pan and place it in the dryer
chamber.
Using non-reusable pan helps to avoid false results by remains of previous samples.
10 single use pans are provided with the moisture analyser. Any quantity may be
delivered on demand.
11.6 Placing a sample
A sample should be placed uniformly all over the pan, so that heat propagates equally all
over the sample and dries whole sample effectively and quickly without leaving “wet”
places.
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