IFM Electronic EFECTOR 600 TW2000, Operating Instructions Manual

Page: 23 / 27

23
UK
23
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�
13.1 Emissivity coefficient tables
List of emissivity coefficients of different materials in %�
Model TW2000
Wavelength λ 8...14 μm
"Black body" 100
Aluminium oxide 76
Asphalt 90���98
Baking oven, dark colour 96
Concrete 55���65
Bitumem (roofing paper) 96
Bread in baking oven 88
Ferrous oxide 85���89
Enamel 84���88
Earth 92���96
Paint and varnish, bright 92
Paint and varnish, pale 94
Gypsum 80���90
Glass 85���95
Graphite 98
Rubber, black 94
Skin, human 98
Wood 80���90
Radiator 80���85
Lime cast 91
Clinker bricks, glazed 75
Cooking plate 95
Synthetic material, nontransparent 65���95