Keller CellaTemp PKL63, Manual, Page: 42 / 60

Operating instructions CellaTemp PKx 6x
42
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�
16.1 Emissivity Table (One-colour mode)
Overview of the emissivities of different materials in %�
Model PKx 6x
Wavelength λ 0.8 - 1.1 μm
Black Body 100
Aluminium, polished 15
Aluminium, blackened 25
Asbestos cement 70
Bronce, polished 3
Bronze, blackened 30
Chromium, polished 30
Iron, heavily scaled 95
Iron, rolling skin 90
Iron, liquid 30
Gold and silver 2
Graphite, blackened 90
Copper, oxidized 90
Brass, oxidized (tarnished) 70
Nickel 20
Porcelain, glazed 60
Porcelain, rough 85
Soot 95
Fireclay 50
Slag 85
Pottery, glazed 90
Bricks 90
Zinc 60