strex SP95 - Distance and Spot Size

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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 relationship between distance and spot size (D:S) for
this device is shown in the next image. The spot size indicates 90 % encircled energy.
The maximum D:S is obtained when the thermometer is 900 mm (36 in) from the target resulting
in a spot size of 75 mm.