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Operating
the
Thermometer
11
ame003.eps
Figure 4. Locating a Hot or Cold Spot
Distance and Spot Size
As the distance (D) from the object being measured 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 shown
in Figure 5. The focal point of each unit is 914 mm (36 in). The spot
sizes indicate 90 % encircled energy. See Figure 5.
