LaserLiner ThermoSpot-Vision Manual De Instrucciones página 19

17
Emissivity coef cient / infrared measurement
A built-in sensor head detects the material/surface-speci c infrared radiation emitted by all objects. The level
of these emissions is determined by the material's emissivity coef cient (0.10 to 1.0). The emissivity coef cient
must rst be set in order to correctly measure the surface temperature. In addition to the de ned emissivity
coef cient, it is also possible to set an individual emissivity coef cient (see Point 8).
Aluminium
Oxidised 0,2 - 0,4
Polished 0,04 - 0,06
Alloy A3003
Oxidised 0,3
Roughened 0,1 - 0,3
Brass
Polished 0,3
Oxidised 0,5
Copper
Oxidised 0,4 - 0,8
Elect. terminal strips 0,6
Haynes
Metal alloy 0,3 - 0,8
Inconel
Oxidised 0,7 - 0,95
Sandblasted 0,3 - 0,6
Electropolished 0,15
Asbestos 0,93
Asphalt 0,95
Basalt 0,70
Coal
Non-oxidised 0,8 - 0,9
Graphite 0,7 - 0,8
Carborundum 0,90
Ceramics 0,95
Earthenware, matt 0,93
Clay 0,95
Concrete, plaster, mortar 0,93 - 0,94
Masonry 0,93
Brick, red 0,93
Lime malm brick 0,95
Fabric 0,95
Glass 0,85 - 0,94
Gravel 0,95
Gypsum 0,8 - 0,95
!
The table lists several material-speci c emissivity coef cients that should be considered as reference
values. The shape and structure of the surface can in uence the emissivity coef cient.
Unknown emissivity coef cient
Apply masking tape or matt black paint to the surface of the area to be measured. Wait until the
tape/paint has assumed the surface temperature. The temperature of the surface can then be measured
with an emissivity coef cient of 0.95.
Metals
Iron
Oxidised 0,5 - 0,9
With rust 0,5 - 0,7
With red rust 0,61 - 0,85
Iron, cast
Oxidised 0,6 - 0,95
Non-oxidised 0,2
Molten mass 0,2 - 0,3
Iron, forged
Matt 0,9
Lead
Rough 0,4
Oxidised 0,2 - 0,6
Molybdenum
Oxidised 0,2 - 0,6
Nickel
Oxidised 0,2 - 0,6
Platinum
Black 0,9
Nonmetals
Ice 0,93 - 0,98
Clear 0,97
With heavy frost 0,98
Limestone 0,98
Paper
All colours 0,95 - 0,97
Wallpaper, light-coloured 0,88 - 0,90
Plastic 0,80 - 0,95
Translucent 0,95
PE, P, PVC 0,94
Soil 0,9 - 0,98
Water 0,93
Wood
Untreated 0,8 - 0,95
Beech, planed 0,94
China
Brilliant white 0,7 - 0,75
With glaze 0,92
Paint
Black, matt 0,96 - 0,98
Heat-resistant 0,92
White 0,85 - 0,95
ThermoSpot-Vision
Steel
Cold rolled
Ground plate
Polished plate
Alloy (8% nickel,
18% chromium)
Galvanised
Oxidised
Heavily oxidised
Freshly rolled
Rough, flat surface
Rusty, red
Sheet, nickel plated
Sheet, rolled
Zinc
Oxidised
Transformer paint
Rubber
Hard
Soft, grey
Cotton
Lime
Tar
Tar paper
Snow
Human skin
Quartz glass
Heat sink
Black, anodized
Marble
Black, dull finish
Greyish, polished
0,7 - 0,9
0,4 - 0,6
0,1
0.35
0.28
0.80
0.88
0.24
0.95 - 0.98
0.69
0.11
0.56
0,1
0,94
0,94 - 0,95
0,89
0,77
0,3 - 0,4
0,79 - 0,84
0,91 - 0,93
0,80
0,98
0,93
0,98
0,94
0,93
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