LaserLiner MoistureFinder Compac Mode D'emploi page 12

Plaster with wallpaper: Wallpaper affects the measurement
to such an extent that the displayed value is falsified. Never-
theless, the reading can still be used to compare the measure-
ment at this spot with the measurement at another spot.
The same is true of tiles, linoleum, vinyl and wood used to
cover building materials.
In some cases the measuring device can measure through these
materials as long as they contain no metal. The reading should
however be taken as a relative measured value.
Plaster: Plaster mode is configured for a plaster thickness of
10 mm applied on concrete, lime-sand brick, cellular concrete.
Other masonry must be checked beforehand.
Wood: The measured depth in wood is 30 mm maximum but
does vary somewhat with differing wood densities. Measure-
ments made on thin wood boards should, if possible, be made
on a stack of these boards as otherwise the measurement
will be too low. Measurements made on installed wooden
structures are influenced by the structural conditions and their
chemical treatments (e.g. paints) with various materials. Thus
such measurements should only be viewed relatively.
Maximum accuracy is achieved between 6% and 30% wood
moisture. In very dry wood (< 6 %) irregular moisture distribu-
tion can be detected, in very wet wood (> 30 %) saturation of
the wood fibres begins.
Material relative moisture reference values, in %, for use
with wood:
– Outdoor usage:
– Use in unheated rooms:
– In heated rooms (12°C ... 21°C):
– In heated rooms (> 21°C):
Example:
100% material moisture for 1 kg of wet wood = 500 g water.
Functional and operational safety is only warranted
when the instrument is operated within the specified
! climatic conditions and is only used for those purposes
for which it is designed. The assessment of measure-
ment results and actions taken as a consequence lie
in the user's scope of responsibility, depending on the
given type of work.
12
EN
12% ... 19%
12% ... 16%
9% ... 13%
6% ... 10%