Distance & Spot Size
As the distance (D) from the object
increases, the spot size (S) of the area
measured by the unit becomes larger.
The relationship between distance and
spot size is 12:1 at the focus point
(0.914 meter/36 inches). The spot
sizes indicate 90% encircled energy.
Circular Laser Sighting
The circular laser is made up of eight
laser spots that form a circle to show the
approximate area being measured; a sin-
gle laser spot shows the center of the
measurement area. In low-light condi-
tions, lighter spots surrounding the laser
circle may appear. These spots are not
used for aiming purposes. Use only the
laser circle to aim the unit.
Reminders
■
Not recommended for use in measuring shiny or polished metal surfaces
(stainless steel, aluminum, etc.). See Emissivity for measuring these surfaces.
■
The unit cannot measure through transparent surfaces such as glass or plastic.
It will measure the surface temperature of these materials instead.
■
Steam, dust, smoke, or other particles can prevent accurate measurement by
obstructing the unit’s optics.
English
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Summary of Contents for 35629-00
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