H63.0.21.6C-01
Operating Manual GMR 110
page 7 of 12
_____________________________________________________
_____________________________________________________________________________
-
Perform multiple measurements: the more measurements will be averaged, the more exact the
result will be.
-
Pay attention to temperature-compensation: enter the exact temperature manually.
Frequent sources of errors:
-
Attention with oven-dried wood: the moisture dispersion may be irregular, often in the core is
more moisture than on the edge.
-
Surface-moisture: The wood-edge could be more humid than the core if the wood had been
stored outside and e.g. was in rain.
-
Wood preservative and other treatment could falsify the measuring.
-
Fouling at the connections and round the pikes could result in erroneous measurement, espe-
cially with dry wood.
5.6 Measuring in plaster
Press needles into the plaster to detect moisture. Select material „c.08“. The more moisture the
plaster is containing, the higher is the display, also keep an eye on the moisture estimation (see
chapter below). Attention: Because of the different consistencies of plasters and the influence dam-
age by moisture, the precision of the measuring is not as high as the precision when measuring in
wood! However „precise measuring values‟ aren‟t necessary in the most cases -> when moisture
appears, it makes large changes in the measuring value compared to dry parts e.g. of the meas-
ured wall, moist sections can easily be detected by the instrument. Also changes in the state (in-
creasing/decreasing moisture) can be monitored by periodical measurings.
5.7 Moisture estimation ('WET' - 'MEDIUM' - 'DRY')
Additionally to the measuring value, an individual moisture estimation will be displayed simultane-
ously: The decision either wet or dry has no longer be affiliated from literature and tables for the
most applications. This moisture estimation is only a guidance value, mainly for join-
ers/carpenters/floorers use, the final evaluation is depending on the application of the material. E.g.
firewood may be already usable while instrument still displays „wet‟!
Corresponding standards and instructions must be observed!
The Device can only complement the skill of a tradesman or investigator but cannot replace it!
5.8 Display values at air
If the probe is not correctly in contact to material, the instrument may display any value!
This is caused by the design and measurement method.
