PeakTech 4970, Руководство по эксплуатации, Страница: 28 / 30

7.3. Locating a hot Spot
To find a hot spot aim the thermometer outside the area of interest,
then scan across with an up and down motion until you locate hot
spot.
NOTE!
1. The unit cannot measure through transparent surfaces such
as glass. It will measure the surface temperature of the glass
instead.
2. Steam, dust, smoke, etc. can prevent accurate measurement
by obstructing the unit´s optics.
7.5 Emissivity Values
Substance Thermal
emissivity Substance Thermal
emissivity
Asphalt 0,90 to 0,98 Cloth (black) 0,98
Concrete 0,94 Human skin 0,98
Cement 0,96 Lather 0,75 to 0,80
Sand 0,90 Charcoal (powder) 0,96
Earth 0,92 to 0,96 Lacquer 0,80 to 0,95
Water 0,92 to 0,96 Lacquer (matt) 0,97
Ice 0,96 to 0,98 Rubber (black) 0,94
Snow 0,83 Plastic 0,85 to 0,95
Glass 0,90 to 0,95 Timber 0,90
Ceramic 0,90 to 0,94 Paper 0,70 to 0,94
Marble 0,94 Chromium oxides 0,81
Plaster 0,80 to 0,90 Copper oxides 0,78
Mortar 0,89 to 0,91 Iron oxides 0,78 to 0,82
Brick 0,93 to 0,96 Textiles 0,90
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