Check The Application Conditions - SICK W4F MultiPulse Betriebsanleitung

7
COMMISSIONING
7.2

Check the application conditions

en
24 O P E R A T I N G I N S T R U C T I O N S | W4F MultiPulse
Figure 14: Alignment 1
WTB4F MultiPulse 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 background 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 with low remission factor.
The minimum distance (= y) for the background suppression can be determined from
the diagram [ figure 15 1] as follows:
Example: x = 200 mm, y = 50 mm. That is, the background (white, 90%) is suppressed
at a distance of > 50 mm of the configured sensing range.
WTB4FP-xxxxx1xx
Minimum distance in mm (y) between the set sensing
range and white background (90 % remission)
y
60
6%/90%
(2.36)
1
50
18%/90%
(1.97)
2
40
(1.57)
30
(1.18)
20
(0.79)
10
3 3
(0.39)
90%/90%
0
0
40 80 120 160 200 240
(1.57) (3.15) (4.72) (6.30) (7.87) (9.45)
Distance in mm (inch)
Recommended sensing range for
the best performance
Figure 15: Characteristics
Example:
1
Safe suppression of the background
2
White background (90 %)
3
x y
Black object (6 % remission)
Set sensing range x = 120 mm
Needed minimum distance to white
x background y = 7 mm
Figure 16: Bar graph
8 15 210
7 15 215
4 15 220
0 40 80 120 160 200 240
(1.57) (3.15) (4.72) (6.30) (7.87) (9.45)
Distance in mm (inch)
D
C
A B
8027506/2022-02-28 | SICK
Subject to change without notice
BluePilot
E
F