Check The Application Conditions - SICK WTV4F Manual Del Usuario

6.2

Check the application conditions:

8025302.1BBX / 2021-05-12 | SICK
Subject to change without notice
Figure 3: Alignment
Sensing range
WTV4F 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 = 20 mm, y = 1,2 mm. That is, the background (white, 90%) is suppressed
at a distance of > 1,2 mm from the sensor.
Minimum distance in mm (y) between the set sensing
range and white background (90 % remission)
y
7
(0.28)
6
(0.24)
5
(0.20)
4
(0.16)
1
3
1%/90%
(0.12)
6%/90%
2
2
(0.08)
3
1
18%/90%
3 4
(0.04)
90%/90% x
0
0 10 20 30 40 50
(0.39) (0.79) (1.18) (1.57) (1.97)
Distance in mm (inch)
Recommended sensing range for
the best performance
Figure 4: Characteristic line
1
2
2
Example:
Safe suppression of the background
3
2
White background (90 %)
4
2
0
x y
Black object (6 % remission)
Set sensing range x = 20 mm
Needed minimum distance to white
background y = 1.2 mm
A
Figure 5: bar graph
COMMISSIONING
5 15 30
15 50
15 50
15 50
10 20 30 40 50
(0.39) (0.79) (1.18) (1.57) (1.97)
Distance in mm (inch)
D
C
B
6
BluePilot
E
F
9