Checkline BL2 - Manual (Page 4)

© Electromatic Equipment Co., Inc.
-4-
3.0 CALIBRATION CURVES BL2 WOOD CHIPS PROBE
Calibration curves Declaration Measuring range
Wood chips Standard woodchips 10 - 50 %
Coarse chips Coarse woodchips 10 - 50 %
Industrial chips Industrial woodchips 10 - 50 %
Pellets Pellets made of wood 11 - 20 %
Sawdust Sawdust 14 - 50 %
Digit 2 For special product
Empty 2 Customer calibration made by Checkline Europe
Test block ! Only for testing the BL2 with the test block !
• Wood chips: standard chips of wood (forest wood chips) according to EU-norm
CEN/TS 14961 class P16 and P45.
• Coarse chips: for coarse wood chips P45 but with fewer fines.
• Industrial chips: for industrial chips of wood without barks and fines (similar
P63)
Definition of wood chips classes
The stated numbers refer to the particle size that goes through round gaps of the
corresponding diametres (e.g. P16: 16 mm).
• P16 minimum 80% of the bulk is between 3,15 and 16 mm
• P45 minimum 80% of the bulk is between 3,15 and 45 mm
• P63 minimum 80% of the bulk is between 3,15 and 63 mm
Compression of wood chips
The humimeter BL2 is calibrated for normally compressed wood chips. If the
measured wood chips are compressed to a much lesser or greater extent, this will
cause measuring imprecisions. Normally compressed wood chips are defined in
norm CEN/TS 15103 (determination of the bulk density).
4.0
DETERMINATION OF THE MATERIAL REFERENCE MOISTURE
The principle is a comparison measurement with the dehydration method according
to CEN/TS 14774. Take the measured sample and weigh it. Dry it out in an oven
and weigh it again.
100 % ×
−
=
Mn
Mt Mn
F
M
n
: Mass with average moisture content
M
t
: Mass of the dried sample
%F: Calculated moisture content
© Electromatic Equipment Co., Inc.
-25-
NOTES