Fluke IRCON ScanIR3, Руководство по эксплуатации

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Appendix
ScanIR3
Rev. A1 Mar 2015
55
N
ON
-M
ETALS
Material Emissivity
1 µm 1.6 µm 5 µm
Asbestos 0.9 0.8 0.9
Asphalt 0.95
Basalt 0.7
Carbon 0.9
Unoxidized 0.8-0.9
Graphite 0.7-0.9
Carborundum 0.9
Ceramic 0.4 0.8-0.95
Clay 0.85-0.95
Concrete 0.65 0.2 0.9
Cloth 0.4-0.9 0.95
Glass
Plate 0.98
“Gob” 0.9
Gravel 0.95 0.95
Gypsum 0.8-0.95 0.4-0.97
Ice —
Limestone 0.4-0.98
Paint (non-al.) 0.8-0.9 —
Paper (any color) 0.8-0.9 0.95
Plastic (opaque, over 20 mils) 0.95
Rubber 0.9
Sand 0.9
Snow —
Soil —
Water 0.8-0.95 —
Wood, Natural 0.9-0.95
Tab. 6: Typical Emissivity Values
To optimize surface temperature measurements, consider the following guidelines:
• Determine the object emissivity using the instrument which is also to be used for the
measurements.
•
Avoid reflections by shielding the object from surrounding temperature sources.
• For higher temperature objects use instruments with the shortest wavelength possible.
• For translucent materials such as plastic foils or glass, assure that the background is uniform
and lower in temperature than the object.
•
Mount the sensor perpendicular to surface whenever emissivity is less than 0.9. In all cases, do
not exceed angles more than 30 degrees from incidence.