DIT-500
– USER MANUAL
33
3.4 Distance and spot size
As the distance (D) from the object increases, the spot size (S)
of the area measured by the unit becomes larger. The relationship
between distance and spot size for each unit is listed below. The
focal point of
unit is 914mm (36”).
4 How it works
Infrared
Infrared thermometers measure the surface temperature of an
object. The unit’s optics sense emitted, reflected, and trans-
mitted energy, which is collected and focused onto a detector.
The unit’s electronics translate the information into a tempera-
ture reading, which is display on the unit. In units with a laser,
the laser is used for aiming purposes only.
Field of View
Make sure that the target is larger than the unit’s spot size.
The smaller the target, the closer you should be to it. When
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