r
s
D
a
Figure 4: Minimum distance from reflective surfaces
Important information
DANGER
Hazard due to lack of effectiveness of the protective device
Reflective surfaces and dispersive media can prevent persons or parts of the body to
be protected from being properly reflected and therefore, they remain undetected.
b
Make sure that all reflective surfaces and objects maintain a minimum distance
from the light beam.
b
Make sure that no dispersive media (e.g., dust, fog, or smoke) are within the calcu‐
lated minimum distance from the light beam.
Determining minimum distance to reflective surfaces
1.
Determine the distance between sender and receiver D in meters (m).
2.
Read the minimum distance a in millimeters (mm) in the graph or calculate it
based on the respective formula from
10
20
30
40
50
60
70
D
/m
1000
2000
4000
3000
5000
6000
7000
a
/mm
262
3
Figure 5: Graph of minimum distance from reflective surfaces
Table 3: Formula for calculating the minimum distance from reflective surfaces
Distance between sender and
receiver D in m
Calculating the minimum distance from reflective sur‐
faces a in mm
D ≤ 3 m
a = 262 mm
D > 3 m
a = tan (5°) × 1,000 mm/m × D = 87.49 × 1 mm/m × D
4
PROJECT PLANNING
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O P E R A T I N G I N S T R U C T I O N S | L25
8024678/2020-01-24 | SICK
Subject to change without notice