Application Notes
25
Hydromette BL A plus
To achieve the qualitatively best possible measurement results, the
wood used for the sample should be measured at multiple points.
For this purpose, the electrode tips must be pressed in crosswise to
the grain direction up to at least 1/4 and at most 1/3 of the total
wood thickness. To prevent measurement errors and breakage of
the measuring tips, the hexagon nuts must always be well
tightened and the area between the tip holders kept clean.
The measurement of frozen wood is not possible.
5.1.1.1
Drive-in electrode M 20
The electrode is driven into the wood to be measured with the
needles across the grain direction (the electrode body is made of
impact resistant plastic). When removing, light lever movements
can be used at right angles to the grain to loosen the needles.
To determine the core moisture content, the electrode tips must
reach to between 1/4 and 1/3 of the overall wood thickness.
On delivery of the measuring instrument with electrode M 20, 10
replacement tips each of 16 and 23 mm length are included. These
are suitable for measurement of wood thicknesses up to 30 and 50
mm respectively.
If thicker wood is to be measured, the electrode needles can be
replaced with a suitably longer version. With increasing needle
length, however, increased danger of breakage or bending
(particularly when pulling out) must be expected. It is therefore
recommended to use the M 18 ram-in electrode for thicker or
particularly hard woods.
If possible, the hexagon nuts should be tightened with a spanner or
pliers before beginning a series of measurements. Loose electrode
tips break off easily.
