H68.0.02.6C-04
Operating Manual GMK 210
page 6 of 20
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5 Measurement Basics
5.1 Measuring field & depth
The device measures by means of an electric field (capacitive measuring method), which
propagates from the rear side downwards. The measuring depth can be changed between approx.
10 mm and 25 mm with the sliding switch.
Side view: measuring field and penetration depth for switch setting “10 mm”
Side view: measuring field and penetration depth for switch setting “25 mm”
The specifications for the penetration depth 10 mm and 25 mm are just approximate values. The
actual depth will be the higher the wetter the measured material is. Therefore areas deeper than
25 mm will be measured in very wet materials and for switch setting 25 mm.
On the rear side the area is marked under that it is predominantly measured.
For precise measurements the device has to lie on the measured material not only
at the marked measuring spot but at its whole rear side. If there is an air gap
between device and material the measured value will be too dry!
Some examples for measurements that are not precise. (Measured value too dry in all cases):
False: wrinkled surface (extreme
example!)
False: unsteady surface
False: material too thin
5.2 Humidity rating
(„WET‟ - „MEDIUM‟ - „DRY‟)
In addition to the measuring value there is a moisture rating via bar graph and acoustic signal (if
activated (see chapter 11
): Therefore the determination „wet or dry‟ is easy and comfortable for
most applications and has no longer be deduced from literature and tables.
However, this rating can only be a first approximate value, because factors like the
application field of the measured material have to be taken into account for the final
rating. This device cannot completely replace the knowledge of an experienced
craftsman or technical expert.
ATTENTION:
ATTENTION:
