stabilize before use).
3) Do not leave the unit on or near objects of high temperature.
4. Distance ratio
1. When take measurement, pay attention to the Distance ratio. As the Distance (D) from the target
surface increases, the spot size (S) of the area measured by the unit becomes larger.
The Distance ratio of the unit is 50:1.
This unit is equipped with a laser, which is used for aiming.
2. Field of view: Make sure the target is larger than the unit’s spot size. The smaller the target the closer
measure distance. When accuracy is critical, make sure the target is at least twice as large as the spot size.
5. Emissivity
Most organic materials and painted or oxidized surfaces have an emissivity of 0.95 (preset in
the unit). Inaccurate readings will result from measuring shiny or polished metal surfaces. To compensate
for this, adjust the units emissivity reading or cover the surface to be measured with masking tape or flat
black paint. Measure the tape or painted surface when the tape or painted reach the same temperature as
the material underneath.
Material ----- Emissivity
Aluminum ----- 0.30
Asbestos ----- 0.95
Asphalt ----- 0.95
Basalt ----- 0.70
Brass ----- 0.50
