7 Commissioning
1 Alignment
WTB26 P: Align sensor on object. Select the position so that the red emitted light beam
hits the center of the object. It is important to ensure that the optical opening (front
screen) of the sensor is completely clear [see figure 1, figure 2].
WTB26 I: Align sensor on object. Select the position so that the infrared light (not visible)
hits the center of the object. The correct alignment can only be detected via the LED indi‐
cators,see table 2, table 7 and table 3. You must ensure that the optical opening (front
screen) of the sensor is completely clear.
Figure 1: Alignment 1 Figure 2: Alignment 2
2 Sensing range
WTBXX are photoelectric proximity sensors with background suppression. Depending on
the remission of the object to be detected, and perhaps the background behind it, a mini‐
mum distance (y) between the set sensing range (x) and the background is to be main‐
tained.
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 correspond‐
ing diagram [see figures 5 and 6] (x = sensing range, y = minimum distance between set
sensing range and background [white, 90%]) Remission: 6% = black 1, 18% = gray 2,
90% = white 3 (referring 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
diagram [figure 3 1] as follows:
Example: x = 600 mm, y = 40 mm. That is, the background (white, 90%) is suppressed at a
distance of > 40 mm from the sensor.
0
40
20
140
120
100
80
60
180
160
200
400
(15.75)
800
(31.5)
2,000
(78.74)
1,200
(47.24)
1,600
(62.99)
0
1
2
3
WTB26P-xxxxx1xx
18%/90%
6%/90%
90%/90%
y
x
yx
Minimum distance in mm (y) between the set sensing
range and background (white, 90%)
white background (90%)
Example:
Sensing range on black, 6%,
x = 600 mm, y = 40 mm
Distance in mm (inch)
Figure 3: Characteristic line 1, WTB26P-xxxxx1xx, red
light
1
Sensing range on black, 6% remission
180
(7.09)
400
(15.75)
A
800
(31.5)
1,200
(47.24)
1,600
(62.99)
0
1
2
3
BluePilot:
30
Adjustment range
Distance in mm (inch)
Sensing range
indicator (blue LED)
Teach-Turn
adjustment
A = Detection distance (depending on object remission)
800
100
/
180
1,000
1,600
75
/
180
180
COMMISSIONING 7
8020354.14CS | SICK
Subject to change without notice
9