KEYENCE SL-CHG Series - Manual (Page 32)

Chapter 2 Installation and Assembly
2-14
2
English ENGLISH
2-3-4 Installation Distance from Glossy Surfaces
• Installation Distance Not Affected by Glossy Surface
If the ambient light is reflected by glossy surfaces around the SL-CHG, the SL-CHG Series may not
operate correctly and it may not detect an object approaching the SL-CHG detection zone.
To avoid such a problem, check the following during an SL-CHG installation.
A
A A
A A
A A
A
A
A
A
A
X
Y
A A A A
0 1
(39.37")
2
(78.74")
3
(118.11")
7
(275.59")
8
(314.96")
9
(354.33")
6
(236.22")
4
(157.48")
5
(196.85")
Safe Dangerous
Operating (T/R) distance (X m (inch))
Minimum operating distance (Y mm(inch))
Distance where indirect reflection is not affected
A=3.0 °
Access direction
Object to be
detected
Transmitter
Receiver
Mirror surface
Area surrounding the
hazardous zone
Transmitter Receiver
Surface of object
to be detected
Area surrounding the
hazardous zone
Mirror surface
A=3.0 °
Object to be
detected
Transmitter Receiver
Mirror surface
Area surrounding the
hazardous zone
Transmitter Receiver
Surface of object
to be detected
Mirror surface
Area surrounding the
hazardous zone
Transmitter Receiver
Area surrounding the
hazardous zone
Mirror surface
Access direction
700 (27.56")
600 (23.62")
500 (19.69")
400 (15.75")
300 (11.81")
200 (7.87")
(157 (6.18"))
100(3.94")
0
* Although the SL-CHG has an effective aperture angle of ±2.5 degrees, use the value of ±3.0 degrees
taking into account any beam axis deviations and other errors that may occur during an installation.
The minimum distance (Y) from the detection zone to the reflection surface can be read from the above
graph or determined using the following formula below. The value Y of this formula is determined as-
suming the worst case scenario that beam axis misalignments occur both on the transmitter and the
receiver.
Calculating the minimum distance Y
If X (operating distance (mm)) > 3000 (118.11"):
Y=X (tan3 °) =0.052X
If X (operating distance (mm))
≤ 3000 (118.11"):
Y=157 (6.18")
WARNING
The SL-CHG must be installed in a position not affected by reflections from glossy
surfaces (Light Interference). If there is any glossy surface near the SL-CHG, cover
such surfaces with a black sheet or apply a black matle finish. Make sure that no
reflected light reaches the SL-CHG. Otherwise, the SL-CHG may malfunction due
to the light reflected by the glossy surface and serious harm, such as an injury or
death of a machine operator, may result.