Velleman DVM105 Bedienungsanleitung Seite 5

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The infrared thermometer is supplied with a default emissivity of
0.95. The emissivity of the thermometer can be changed from 0.05
(5E) to 1 (100E). Changes should only be carried out by
experienced personnel. To change the emissivity, turn the
instrument on by pressing the Meas. Button (3), then press the
Mode button (4) five times for emissivity function. The current
setting is shown on the LCD screen. Press the Meas. Button (3) to
adjust the emissivity value, press the Mode button (4) again to exit
the set up screen. For information relating to the emissivity of
specific materials, please contact the nearest retailer.
Note: non-contact infrared thermometers are not recommended for
measuring the temperature of shiny or polished metals. See table
below for a short overview of emissivity values.
Substance
Asphalt
Concrete
Cement
Sand
Earth
Water
Ice
Snow
Glass
Ceramic
Marble
Plaster
Mortar
Brick
Troubleshooting
1.6.
00 (30/06/2008)
DVM105
Emissivity
0.90 to 0.98
0.94
0.96
0.90
0.92 to 0.96
0.92 to 0.96
0.96 to 0.98
0.83
0.90 to 0.95
0.90 to 0.94
0.94
0.80 to 0.90
0.89 to 0.91
0.93 to 0.96
'Hi' or 'Lo' is displayed when the temperature being
measured is outside of the range of the instrument, 'Hi'
when higher than +220°C (428°F) and 'Lo' when lower
than –33°C (-27°F).
Substance
Cloth (black)
Human skin
Leather
Charcoal (powder)
Lacquer
Lacquer (matt)
Rubber (black)
Plastic
Timber
Paper
Chromium oxides
Copper oxides
Iron oxides
Textiles
5
Emissivity
0.98
0.98
0.95 to 1.00
0.96
0.80 to 0.95
0.97
0.94
0.85 to 0.95
0.90
0.70 to 0.94
0.81
0.78
0.78 to 0.82
0.90