Schaller Messtechnik Humimeter BMA User Manual page 7

Selection of the right calibration curve for wood chips
The right calibration curve depends on the size of wood chips
and especially on the content of fines.
We gladly assist you with the selection of the right calibration
curve. Take a picture placing a measuring tape next to your wood
chips and send it to
recommendation promptly.
If you are not sure which calibration curve is the best suited for
your material, it is recommended to carry out a reference
measurement by kiln-drying (EN 14774).
Below you can find instructions and pictures for the
different calibration curves. For further pictures on our
website, please just click on the QR code.
1.) Wood chips
This calibration curve is used for forest wood chips (P16 to P45)
and for similar wood chips types with coarse and a lot of fine
fraction.
Fine fraction mainly originates from barks and small branches.
If the material doesn´t contain small parts, one of the two other
wood chips calibration curves has to be taken.
This calibration curve also has to be taken for wood chips from
short rotation forestry harvested by a field chopper.
2.) Coarse chips
For coarse chips as well as finer wood chips with few fine fraction
of wood chips classes P31 up to P63.
This can be wood chips from sawmill residues or coarse forest
wood chips with few fines.
3.) Industrial wood chips
This calibration curve is suited for wood chips without fines of
classes P45 to P63.
Such wood chips for example produce sawmills chipping cutting
residues (without barks).
version 2.2
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