A photoelectric sensorÂ’s deadband is:
The spectrum of light it cannot sense
The undetectable area just in front of the sensor
What light is called when it is reflected away from the sensor
The amount of time the sensor is guaranteed to remain in operation
A diffuse mode sensorÂ’s detection range is influenced by:
Sound
Color
Speed
Amount of metal
What is the purpose of a sensitivity potentiometer?
Used to increase or decrease the sensorÂ’s switching threshold
Prevents unauthorized users from adjusting the sensor once it has been installed in an application
Provided as a means of selecting Light-On or Dark-On operation
Used for selecting the frequency of light the sensor emits
Which statement best describes a Dark-ON output switching type?
Output is normally open and normally closed
This term does not apply to photoelectric sensors
Output is inactive when the sensor receives light
Output is active when the sensor receives light
Thru-beam mode sensors:
Have the longest detection distances compared to other sensing modes
Have lower installation costs compared to other sensing modes
Have the emitter and receiver in the same housing
ArenÂ’t susceptible to cross talk
What is the most significant limitation when using a sensor with an infrared light source?
Considerable increase in sensitivity to objects that vary in color
Limited operating temperature
Infrared is an inefficient light source
The emitted light cannot be seen by the human eye, making alignment extremely difficult
With diffuse mode sensors, objects are sensed when:
Light reflects away from the sensor
No light is received by the sensor
Light reflects off the target and back to the sensor
Light is absorbed by dark targets
