To measure a temperature, point the unit at the target, pull the trigger and hold. Make sure the target area is within the field of view of the instrument. The laser circle sighting is used to indicate the perimeter of the instrument’s field of view.
Laser Aperture 
Laser 
Circle
Sighting
Optical Lens
Thermocouple Input
(OSXL689)
Measuring Trigger
Laser
Warning &
Certification
ID Label Label and
Field of View
Label
Display
Screen
USB Port
(OSXL689)
Battery
Compartment
Laser
Warning &
Certification
Label and
Field of View
Label
6