Trotec T600 Bedienungsanleitung Seite 33

Because of the relationship described above, between the material
bulk density and the dielectric constant for building materials,
varying values can be displayed where there are multi-layer
structures or different material densities within the floor and wall
regions. In order to minimise any errors of interpretation that may
result, a cluster of measurements should be taken.
Here within a radius of 20 cm at least five different depth measure-
ments are taken and from these individual results the average value
is formed. This value then forms the value for comparison with other
cluster measurement locations.
Where the materials are homogeneous (e.g. brickwork thicker
than 30 cm) it is not absolutely essential to undertake a cluster
of measurements. For more accurate analysis, however, a cluster
of measurements is also recommended in this case. Here three
measurements within a radius of 15 cm are in general sufficient
as a basis for assessment.
Operating manual – English
B - 13