H68.0.02.6C-04
Operating Manual GMK 210
page 12 of 20
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Insulation and metal framing of an older caravan
Consider the properties of water:
- water normally flows downwards: water accumulations at the side walls have most
commonly their reason above the spot.
- water flows faster through gaps than through bulky materials, i.e. water can move along
rods, cables, etc. to accumulation spots
Absolute moisture (characteristic) and relative measurements
The device can display absolute material moisture if a suitable characteristic curve is selected and
the measured component is bulky enough (at least thicker than ~8mm). In this case the moisture
can be immediately rated (bar graph and buzzer).
Note: There are cases in which a precise absolute moisture measurements (in [%]) and the ratings
based on this measurements cannot be performed. However, a relative measurement may be still
possible: therefore the displayed measuring value is compared to an value measured at a definitely
dry spot of the same material. A displayed value considerably higher than that reference value
indicates a corresponding measuring point with most likely increased humidity.
Measuring at bulky components ( parts of the wooden framework, etc.)
Select e.g. “wood characteristic”. Measuring depth 10 or 25mm, depends on thickness
Caravan floor: massive flake board, little protected
Measuring at thinner layers, rating of “sandwich”-construction
For wood veneers/parquet: “wood characteristic”. For GRP-layers (alcove, etc.) “GRP-
characteristic.
Select measuring depth 10mm to rate the material and 25mm to detect moisture behind the layer.
Measuring at insulations
Older models are often isolated with
simple polystyrene -> measurable water
accumulations can occur.
Attention! Here relative values are more
relevant, because for insulation materials
only very small display values are
measured.
Suggested setting, if it is measured
directly on insulation
: “ISO”, 25 mm
.
