Making Accurate Measurements - General IRT102 User Manual

6:1 pocket infrared thermometer
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IRT102 Manual 3-lang_FINAL2a-032614_awb 3/26/14 9:54 AM Page 6
Table 1. Emissivities of common materials
Material
Aluminum
Asphalt
Concrete
Asbestos
Ceramics
Brass
Brick
Carbon
Sludge
Frozen Food
Hot Food
Ice
Snow
Human Skin

MAKING ACCURATE MEASUREMENTS

The IRT102 has a distance-to-spot (D:S) ratio of 6:1. This
means that the target area (spot) whose infrared radiation
(temperature) is being measured increases in diameter by
1 inch for every 6 inches you move away from the target.
Conversely, the diameter of the target area measured
decreases by 1 inch for every 6 inches you move closer to
the target.
6
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
Material
Glass
Iron Oxides
Paint
Plastic
Paper
Plaster
Rubber
Wood
Textile
Lead
Marble
Cloth (black)
Sand
Water
Emissivity
0.90 to 0.95
0.78 to 0.82
0.80 to 0.95
0.85 to 0.95
0.70 to 0.94
0.80 to 0.90
0.95
0.90
0.94
0.50
0.94
0.98
0.90
0.93

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