Fluke 56X User Manual download pdf (Page 26)

56x

Users Manual

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 (D:S) for each unit is shown in Figure 7. The spot sizes

indicate 90 % encircled energy.

568

D:S=12:1

38 mm @

300 mm

75 mm @

900 mm

132 mm @

1500 mm

1.5 " @

12 "

3 " @

36 "

5.3 " @

60 "

561

eyl06a.eps

Figure 7. Distance and Spot Size

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Fluke 56X User Manual Page 26