16
• 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, cover 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.
Substance
Thermal emissivity
Substance
Thermal emissivity
Asphalt
0.90 to 0.98
Cloth (black)
0.98
Concrete
0.94
Human skin
0.98
Cement
0.96
Lather
0.75 to 0.80
Sand
0.90
Charcoal (powder)
0.96
Earth
0.92 to 0.96
Lacquer
0.80 to 0.95
Water
0.92 to 0.96
Lacquer (matt)
0.97
Ice
0.96 to 0.98
Rubber (black)
0.94
Snow
0.83
Plastic
0.85 to 0.95
Glass
0.90 to 0.95
Timber
0.90
Ceramic
0.90 to 0.94
Paper
0.70 to 0.94
Marble
0.94
Chromium oxides
0.81
Plaster
0.80 to 0.90
Copper oxides
0.78
Mortar
0.89 to 0.91
Iron oxides
0.78 to 0.82
Brick
0.93 to 0.96
Textiles
0.90
• Emissivity Values
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.
Manuel d'instructions
RS-9862S
Numéro de Stock: 200-3700
Thermomètre IR 2200
o
C, LCD de couleur TFT, avec la
fonction vidéo / caméra
FR
IR Thermometer 2200
o
C, TFT color LCD, video/camera function / English
