Distance And Spot Size; Field Of View - Egatronic 51261 Manual De Instrucciones

Figure 5. Locating 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 unit 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.
See Figure 7.
Figure 7. Field of View
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