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Using a reference emissivity coefficient
Apply matte black colour to a part of the surface to be measured. This part has an
emissivity of 94 %. At first, measure the temperature of the coloured part. Then
make a comparative measurement right next to the coloured part and adjust the
emissivity on the pyrometer until it displays the previous measurement reading
again.
17.1 Emissivity Table (One-colour mode)
Overview of the emissivities of different materials in %.
Model
Wavelength λ
Black Body
Aluminium, polished
Aluminium, blackened
Asbestos cement
Bronce, polished
Bronze, blackened
Chromium, polished
Iron, heavily scaled
Iron, rolling skin
Iron, liquid
Gold and silver
Graphite, blackened
Copper, oxidized
Brass, oxidized (tarnished)
Nickel
Porcelain, glazed
Porcelain, rough
Soot
Fireclay
Slag
Pottery, glazed
Bricks
Zinc
7MC3052-...
0.8 - 1.1 μm
100
15
25
70
3
30
30
95
90
30
2
90
90
70
20
60
85
95
50
85
90
90
60
39
Operating instructions
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