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11. Notes
(1) Working principle
The infrared thermometer is designed for measuring
surface temperature of an object.
The optical sensor can emit, reflect and transmit energy,
which is collected and focused on a detector, then
translate it into the temperature reading by electronics
and displayed on the LCD screen.
The laser is used for aiming the target object only.
(2) Field of View
The object under test should be larger than the spot size
calculated by the field of view diagram.
The smaller the target object is, the closer the meter
should be to it for accurate measuring.
When accuracy is critical, make sure the target is at least
twice as large as the spot size.
(3) Distance& Spot Size
As distance (D) from the object increases, the spot size (S) of
the area measured by the unit becomes larger.
Summary of Contents for PCE-675
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