Infrared photoelectric switches can be used in various applications. When using infrared photoelectric switches, attention should be paid to environmental conditions so that the infrared photoelectric switches can work normally and reliably.
Avoid strong light sources
Infrared photoelectric switches generally work stably when the ambient illuminance is high. However, it should be avoided that the optical axis of the sensor faces strong light sources such as sunlight and incandescent lamps.
When the angle between the optical axis of the sensor (receiver) and the strong light source cannot be changed, a light-shielding plate or a long light-shielding tube can be installed around the sensor.
Prevent mutual interference
Infrared photoelectric switches usually have the function of automatically preventing mutual interference, so there is no need to worry about mutual interference. However, when several groups of HGK series through-beam infrared infrared photoelectric switches are installed in parallel and close to each other, the adjacent groups and mutual interference should be prevented. The most effective way to prevent this kind of interference is to set the emitter and the receiver crosswise, and open the group distance when more than 2 groups. Of course, using models with different frequencies is also a good way.
The effective way for the reflective infrared photoelectric switch to prevent mutual interference is to open the gap. And the farther the detection distance is, the larger the interval should be, and the specific interval should be determined according to the debugging situation. Of course, models with different operating frequencies can also be used.
Mirror angle effect
When the measured object is shiny or encounters a smooth metal surface, the reflectivity is generally very high, which is similar to a mirror surface. At this time, the projector and the detected object should be installed at an angle of 10~20° to make the optical axis It is not perpendicular to the detected object to prevent malfunction.
Eliminate the influence of background objects
When using a reflective diffuser type projector and receiver, sometimes the infrared photoelectric switch may not be able to detect stably because the detected object is close to the background object, and the infrared photoelectric switch or the background is smooth and other objects with high reflectivity.
Therefore, you can switch to distance-limited projectors and receivers, or use methods such as staying away from the background object, removing the background object, painting the background object in matte black, or trying to make the background object rough and dark.
Self-diagnostic use
During installation or use, problems such as slight deviation of the optical axis, lens contamination, dust accumulation, external noise, and out-of-range ambient temperature may sometimes be caused due to the influence of the table or the background and the vibration of the use. These problems may cause the infrared photoelectric switch to deviate from the stable working area. At this time, the self-diagnosis function of the infrared photoelectric switch can be used to make it notify the user through the STABLITY green stability indicator to remind the user to adjust it in time.
Eliminate countertop impact
When the emitter and the receiver are installed close to the table, part of the light beam reflected by the table may hit the receiver and cause unstable operation. For this, try to make the light receiver and the light projector a certain distance away from the table and install a light-shielding plate.
Do not use chemicals such as thinner to avoid damage to the plastic lens. The wiring of the high voltage line, power line and photoelectric sensor should not be placed in the same wiring tube or wire slot, otherwise it will cause (sometimes) malfunction or damage of the infrared photoelectric switch due to induction, so in principle, they must be wired separately .
The following places may cause the malfunction of the infrared photoelectric switch, which should be avoided as much as possible:
1. Places with a lot of dust;
2. Places with more corrosive gases;
3. Places where water, oil, and chemicals may directly splash;
4. Outdoors or places where there is direct sunlight without shading measures.
5. Places where the ambient temperature changes beyond the specified range of the product;
6. Places where vibration and shock are large, but shock-absorbing measures are not taken.