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7. Operation
7.3.7 Taking measurements to rough
surfaces
When measuring to rough surfaces, e.g.
coarse render, stucco, etc, an average dis-
tance value is measured weighting the cen-
tre of laser spot higher that the edges of
the laser spot.
7.3.8 Taking measurements to round or
inclined surfaces
If surfaces of this kind are aimed to an
obtuse angle, inadequate light energy or,
when aimed perpendicular, measurements
may refer to the reflected laser spot from
elsewhere. In both cases we recommend
the use of the PDA 50 target plate
7.3.9 Taking measurements to wet or
shiny surfaces
As long as the range meter can be aimed
towards the surface, a distance to the
target will be reliably measured. In the case
of highly reflective surfaces, a reduction in
the range or a measurements to the actual
light reflex from elsewhere must be
expected.
7.3.10 Taking measurements to
transparent surfaces
It is not possible to measure distances to
transparent materials, e.g. liquids, foam
polystyrene, etc. This is because light pen-
etrates these materials and therefore meas-
uring errors may occur. If
measurements are taken through glass,
measuring errors may also occur.
7.3.11 Measuring ranges
7.3.11.1 Increased distances
– Taking measurements in the dark, at
dawn, dusk and to shaded targets or
with the front of the range meter shaded,
generally leads to an increase of the
measuring range.
– Taking measurements to the PDA 50
target plate also results in an increase
of the measuring range.
7.3.11.2 Reduced distances
– Taking measurements in very bright
ambient light, e.g. in sunshine or a very
bright spotlight etc, can lead to a reduced
distances.
– Taking measurements through glass or
other objects in the target beam can lead
to a reduced measuring range.
– Taking measurements to matt green, blue
or black, wet or shiny surfaces can lead
to a reduced measuring range.
Printed: 07.07.2013 | Doc-Nr: PUB / 5070011 / 000 / 00
