Storch HPM allround Mode D'emploi page 138

6.11.2 Capacitive measuring principle
Place the device such that
the sensor pads fully rest on
the material to be measured
and exert a pressure of about
2.5 kg onto the surface to be
measured.
TIP: Use scales to test the
contact pressure.
• Make sure that the sensor pads make good contact with the
material with no air inclusions.
• The contact pressure compensates for unevenness of the sur-
face and small dust particles.
• Measured surface should be free of dust and dirt
• Always take spot measurements while exerting a contact
pressure of 2.5 kg.
• For quick checks, while exerting light pressure, you can slide the
device over the surface. (Look out for nails and pointed objects!
Danger of injury and damage to sensor pads!) Measure again at
the highest deflection point while applying 2.5 kg contact
pressure.
• Keep at least a 5 cm distance from metal objects
• Metal pipes, electric lines and reinforcing steel can falsify
measurement results
• Always measure at several different spots
Wood: The measured depth in wood is 30 mm maximum but does
vary somewhat with differing wood densities. Measurements made
on thin wood boards should, if possible, be made on a stack of the-
se boards as otherwise the measurement will be too low. Measure-
ments made on installed wooden structures are influenced by the
138
Always hold and press down the
measuring device in the same
way (see illustration).
Original instruction