Check The Application Conditions - SICK WTB4S-3 Manual De Instrucciones

7.2

Check the application conditions

8027693.1E52/2022-03-21 | SICK
Subject to change without notice
Figure 9: Alignment
WTB4S-3 are photoelectric proximity sensors with background suppression. Depending
on the remission factor of the object to be detected, and perhaps the background
behind it, a minimum distance (y) between the set sensing range (x) and the back‐
ground is to be maintained.
Check the application conditions:
Adjust the sensing range and distance to the object and background as well as the
remission capability of the object according to the corresponding diagram (x = sensing
range, y = minimum distance between set sensing range and background (white, 90%))
Remission factor: 6% = black 1, 18% = gray 2, 90% = white 3 (relative to standard
white as per DIN 5033). We recommend that the adjustment be performed with an
object of low remission factor.
The minimum distance (= y) for the background suppression can be determined from
the diagram [figure 10 1] as follows:
Example: x = 100 mm, y = 10 mm. That is, the background (white, 90%) is suppressed
at a distance of > 10 mm of the configured sensing range.
% of sensing distance
30
25
20
15
10
5
0
mm 20 60 100
(inch) (0.79) (2.36) (3.94)
Figure 10: Characteristics
Check the function as described in
behave as described in see figure 8, page
1
2
3
0
Sensing range max.
Figure 11: Bar graph
140 180
(5.51) (7.09)
Distance in mm (inch)
see figure 8, page 18. If the digital output fails to
18, check the application conditions.
O P E R A T I N G I N S T R U C T I O N S | WTB4S-3
COMMISSIONING
4 10
4 10
4 10
45 90 135
(1.77) (3.54) (5.31)
Distance in mm (inch)
Sensing range
7
en
180
180
180
180
(7.09)
19