Check The Application Conditions - SICK WTB4FT DoubleLine Instrucciones De Uso

6.2

Check the application conditions:

8025300.1BBX / 2021-05-12 | SICK
Subject to change without notice
Figure 3: Alignment
Sensing range
WTB4FT are photoelectric proximity sensors with background suppression. Depending
on the remission 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 or 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: 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.
The minimum distance (= y) for the background suppression can be determined from
the figure figure 4 as follows:
Example: x = 50 mm, y = 1 mm. That is, the background (white, 90%) is suppressed at
a distance of > 1 mm from the sensor.
NOTE
Observe the minimum distance of 8 mm.
Minimum distance in mm (y) between the set sensing
range and white background (90 % remission)
y
60
(2.36)
50
(1.97)
40 6%/90%
(1.57) 1
18%/90%
30
2
(1.18)
90%/90%
20
3 3
(0.79)
10
(0.39)
x
0
0
20 40 60 80 100 120
(4.72)
(0.79) (1.57) (2.36) (3.15) (3.94)
Distance in mm (inch)
Recommended sensing range for
the best performance
Figure 4: Characteristic line
1
8 15
2
8 15
Example:
Safe suppression of the background
3
7
White background (90 %)
0
x y
Black object (6 % remission)
Set sensing range x = 80 mm
Needed minimum distance to white
background y = 5 mm
A
Figure 5: bar graph
COMMISSIONING
112
117
15 120
20 40 60 80 100 120
(0.79) (1.57) (2.36) (3.15) (3.94) (4.72)
Distance in mm (inch)
D
C
B
6
BluePilot
E
F
9