Introduction
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3.4 Prevention of erroneous measurements
3.4.1 Rough surfaces
On a rough surface (e.g. coarse plaster), measure against the center of the illuminated
area. To avoid measuring to the bottom of gaps in the surface use a target plate, see
10 Accessories on page 138 or board.
3.4.2 Transparent surfaces
To avoid measuring errors, do not measure against transparent surfaces such as
colorless liquids (such as water) or (dust-free) glass. In case of unfamiliar materials
and liquids, always carry out a trial measurement.
Erroneous measurements can occur when aiming through panes of glass,
or if there are several objects in the line of sight.
3.4.3 Wet, smooth, or high-gloss surfaces
1
Aiming at an “acute” angle deflects the laser beam. The LLB may receive a signal
that is too weak or it may measure the distance targeted by the deflected laser
beam.
2
If aiming at a right angle, the LLB may receive a signal that is too strong.
3.4.4 Inclined, round surfaces
Measurement is possible as long as there is enough target surface area for the laser
spot.
3.4.5 Multiple reflections
Erroneous measurements can occur in the case if the laser beam is reflected from
other objects than the target. Avoid any reflecting object along the measurement path.
