8
Locating a Hot or Cold Spot
To find a hot or cold spot, aim the thermometer outside the target area. Then, slowly scan across the area with
an up and down motion until you located the hot or cold spot.
Distance and Spot Size
As the distance (D) from the target being measured increases, the spot size (S) of the area measured by the
instrument becomes larger. The spot size indicates 90% encircled energy.
Field of View
Make sure that the target is larger than the spot size. The smaller the target, the closer you should be to it.
