UNI-T MIE0148, Руководство пользователя

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Owner’s manual
EN
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. The maximum D:S is ob -
tained when the Thermometer is 1000mm (100 in) form the target
resulting in a spot size of 20mm (2 in).
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. Suggested distance less
than 75% of the theory value.