Chapter 21 & 24 Flashcards
A(n) ________ photoelectric control is a photoelectric control that energizes the output switch when the target is missing (removed from the path of the beam).
light-operated
A(n) _________ photoelectric control is a photoelectric control that energizes the output switch when the target is present (break the path of the beam).
dark-operated
The operating point at which the level of light intensity triggers the output is determined by the ______ adjustment.
sensitivity
_______ scan is a scanning technique which uses a special lens to filter the emitter’s beam of light so that it is projected in one plane only.
polarized
________ scan is a scanning technique normally used in high-vibration applications.
retroreflective
________ scan is scanning technique which should generally be the first choice for scanning targets that block most of the light beam.
Direct
________ scan is a scanning technique which is generally used in color mark detection.
Diffuse
________ scan is a scanning technique which places the transmitter and receiver at equal angles from a highly reflective surface
Specular
________ scan is a scanning technique which focuses the light beam to a fixed focal point in front of the photo receiver.
Convergent beam
A _______ sensor is a proximity switch that detects the proximity of a magnetic field.
capacitive
A ________ sensor is a proximity switch that detects either conductive or nonconductive substances
capacitive
The amount of current drawn by a load when energized is know as ________.
load current
A ________ proximity sensor is a proximity switch that detects conductive substances only.
inductive
Capacitive sensors work based on the ________ of the material to be sensed.
dielectric constant
________ actuation is an active method of sensor activation in which a magnet is moved across the face of the Hall effect sensor at a constant distance (gap).
side-by
