Cleaning And Maintenance - Velleman DEM101 Bedienungsanleitung

Remarks: The temperature
 of a shiny or polished metal surface
 through a transparent surface such as glass
 of an object covered with frost, grime, oil
cannot be measured.
7.2 Measuring the Emissivity
1. Hold the mode button pressed to enter/exit the emissivity mode.
2. Adjust the emissivity value with the °C/°F and backlight buttons.
substance
aluminium
asphalt
concrete
leather
ceramic
copper
brick
carbon
fat
frozen food
hot food
ice
snow
human skin

8. Cleaning and Maintenance

 The IR sensor is the most delicate part of the device and it shall be kept
clean at all times. To do this, only use a soft cloth or cotton bud with a
little water or medical alcohol.
 Allow the lens to fully dry before using the device.
 Wipe the other parts of the device regularly with a moist, lint-free cloth.
Do not use alcohol or solvents.
 Do not submerge the device in water or any other liquid.
 There are no user-serviceable parts. Contact your dealer for spare parts
if necessary.
 The device shall be stored between –20° C and +65° C (–4° F to
+149° F).
V. 02 – 07/05/2015
DEM101
Emissivity Table
emissivity
0.30
0.95
0.95
0.95
0.95
0.50
0.90
0.85
0.94
0.90
0.93
0.98
0.90
0.98
6
substance
glass
iron oxides
lacquer
plastic
paper
sand
rubber
timber
textiles
lead
marble
cloth
plaster
water
emissivity
0.90 ~ 0.95
0.78 ~ 0.82
0.80 ~ 0.95
0.85 ~ 0.95
0.70 ~ 0.94
0.90
0.95
0.94
0.94
0.50
0.94
0.98
0.80 ~ 0.90
0.93
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