D
a
Figure 9: 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 beams.
b
Make sure that no dispersive media (e.g., dust, fog, or smoke) are within the calcu‐
lated minimum distance from the light beams.
b
Make sure that there are no reflective surfaces behind the passive unit outside
the maximum scanning range that could cause a beam deflection.
Determining minimum distance to reflective surfaces
1.
Determine the distance between active and passive units (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
:
500
400
300
200
100
a/mm
D/m
1
2
3
4
5
6
7
8
Figure 10: Graph of minimum distance from reflective surfaces
Table 10: Formula for calculating the minimum distance from reflective surfaces
Distance between active and pas‐
sive units (D) in m
Calculating the minimum distance from reflective sur‐
faces a in mm
D ≤ 3 m
a = 131 mm
D > 3 m
a = tan (2.5°) × 1,000 mm/m × D = 43.66 × 1 mm/m ×
D
4
PROJECT PLANNING
24
O P E R A T I N G I N S T R U C T I O N S | deTem4 A/P
8024782/2019-11-19 | SICK
Subject to change without notice