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③Steam, dust, smoke, etc., can prevent accurate measurement by obstructing the unit's optics.
Emissivity
Emissivity is a term used to describe the energy-emitting characteristics of materials.
Most (90% of typical applications) organic materials and painted or oxidized surfaces have an emissivity of 0.95
(pre-set in the unit). Inaccurate readings will result from measuring shiny or polished metal surfaces. To compensate,
cove the surface to be measured with masking tape or flat black paint. Allow time for the tape to reach the same
temperature as the material underneath it. Measure the temperature of the tape or painted surface.
Emissivity Values
Substan
Thermal
Asphalt
0.90 to 0.98
Concret
0.94
Cement
0.96
Sand
0.90
Earth
0.92 to 0.96
Water
0.92 to 0.96
Ice
0.96 to 0.98
Snow
0.83
Glass
0.90 to 0.95
Ceramic
0.90 to 0.94
Marble
0.94
Plaster
0.80 to 0.90
Mortar
0.89 to 0.91
Brick
0.93 to 0.96
9. MAINTENANCE
Repairs or service are not covered in this manual and should only be carried out by qualified trained technician.
Periodically, wipe the body with a dry cloth. Do not use abrasives or solvents on this instrument.
For service, use only manufacturer's specified parts.
Thermal
Substance
Cloth (black)
0.98
Human skin
0.98
Lather
0.75 to 0.80
Charcoal
0.96
Lacquer
0.80 to 0.95
Lacquer (matt)
0.97
Rubber (black)
0.94
Plastic
0.85 to 0.95
Timber
0.90
Paper
0.70 to 0.94
Chromium
0.81
Copper oxides
0.78
Iron oxides
0.78 to 0.82
Textiles
0.90
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