14
EN
Distance and Spot Size
S
D
Distance : Spot = 12:1
0.5 in @ 6 in
1 in @ 12 in
12.5 mm @ 152 mm 25 mm @ 305 mm
Emissivity
• Most organic materials and painted or oxidized
surfaces have an emissivity of 0.95.
• Inaccurate readings might occur while
measuring shiny or polished metal surfaces.
To compensate for this, cover the surface to be
measured with masking tape or flat black paint.
• Measure taped or painted surfaces when the
tape or painted surface reaches the same
temperature as the material underneath.
