Prevention Of Erroneous Measurements; Rough Surfaces; Transparent Surfaces; Wet, Smooth, Or High-Gloss Surfaces - Dimetix DLS-C 15 Technical Reference Manual

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ECHNICAL

5.3 Prevention of erroneous measurements

5.3.1 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 accessories on www.dimetix.com) or board.

5.3.2 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 glass panes
or if there are several objects in the line of sight.

5.3.3 Wet, smooth, or high-gloss surfaces

1 Aiming at an "acute" angle deflects the laser beam. The DLS-C(H)/FLS-C(H) 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 DLS-C(H)/FLS-C(H) may receive a signal that is too strong (error message 256).

5.3.4 Inclined, round surfaces

Measurement is possible as long as there is enough target surface area for the laser spot. On irregular and round surfaces the arithmetic
average of the illuminated surfaces will be measured.

5.3.5 Multiple reflections

Erroneous measurements may occur if the laser beam is reflected by other objects than the target. Avoid any reflective object along the
measurement path.

5.3.6 Influence of sun light

Aiming directly to the sun or the sun is exactly behind the target could make it impossible to measure distances.
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