Prevention Of Erroneous Measurements; Rough Surfaces; Transparent Surfaces; Wet, Smooth, Or High-Gloss Surfaces - TR-Electronic _LLB500(F)-00601 Benutzerhandbuch

7.3 Prevention of erroneous measurements

7.3.1 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 11 "Accessories" on page 155
or board.

7.3.2 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.

7.3.3 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
(error message 255) 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 (error message 256).

7.3.4 Inclined, round surfaces

Measurement is possible as long as there is enough target surface area for the laser spot.

7.3.5 Multiple reflections

Erroneous measurements can occur in the case that the laser beam is reflected from other objects
than the target. Avoid any reflecting object along the measurement path.
7.3.6 Multiple reflections
Aiming directly to the sun or the sun is exactly behind the target could make it impossible to measure
distances.
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03/09/2016 TR - ELE - BA - DGB - 0021 - 06
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