H68.0.02.6C-04
Operating Manual GMK 210
page 10 of 20
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7 Wood Measuring
Choose material corresponding to your type of wood according to the table in addendum A.
Example: You want to measure Scots pine -> select material d.50
Best results are obtained if you measure crossways to the wood‟s grain. (see right picture)
Unplanned and wrinkled surfaces cause too low measuring results!
NOTE:
Wood is a natural product. Its density fluctuates due to the tree‟s
growth and flaws (knots, cracks, resin pockets, etc.). This may lead
to measuring errors up to several %u, because the measurement
depends on density.
If your kind of wood is not listed in addendum A, you have to know its density
(dry): for example a wood of density 0.68 kg/dm
3
is measured with material d.70
(approximate actual density to the next material 0.52 ->d.50, 0.53 -> d.55)
8 Measurement of Other Materials
The device has not saved characteristics for all materials. But even if there is no characteristic
curve for your material you can do significant
relative measurements
.
We recommend the material “rEF” (dimensionless digit-value, intentional no %u or %w display) for
this purpose.
For example if you want to evaluate water damage you can measure surely dry spot and an
evidently wet one (identifiable by salt efflorescence, water spots, mould growth, etc.). Then you can
compare the other measuring values with them and get the moisture distribution of your measuring
area or find the reason for the moisture penetration.
You do not need absolute values (%u or %w) for this.
NOTE:
Please consider that the configuration of the measured wall (cavity block, cement
joints, reinforcements, etc.) may also influences the measuring values.
