User manual
53
Dew point temperature measurement
Measuring area °C Accuracy
0 to +50 °C
±1 °C +10 to +40 °C
±1.5 °C Residual range
Measuring range °F Accuracy
+32 to +122 °F
±1.8 °F +50 to +104 °F
±3 °F Residual range
Relative humidity measurement
Measuring range %RF Accuracy
0 - 40%RF ±5%RF
40 - 60%RF ±4%RF
60 - 80%RF ±5%RF
80 - 100%RF ±6%RF
b) Degree of emission of different surfaces
The emission degrees listed in the table are approximates. Various parameters, such as geometry and surface qual-
ity, may inuence the emission degree of an object.
The meter is delivered with a pre-set emission degree of 0.95. It matches for most non-metal materials. The IR
measuring method is only conditionally suitable for blank metals and requires a special surface treatment (e.g. matte
insulation tape, etc.) or pre-setting of the corresponding degree of emission.
Surface Emission Degree Surface Emission Degree
Aluminium, blank 0.04 Copper, oxidised 0.60
Aluminium, oxidised 0.30 Brass, oxidised 0.50
Asphalt 0.90 - 0.98 Paints, matte 0.93 - 0.97
Concrete 0.94 Foods 0.93 - 0.98
Ice 0.96 - 0.98 Human skin 0.98
Iron oxide 0.78 - 0.82 Plastic 0.94
Colour 0.93 Paper 0.97
Plaster 0.80 - 0.90 Sand 0.90
Glass/porcelain 0.92 - 0.94 Textiles 0.90
Rubber, black 0.94 Water 0.92 - 0.96
Wood 0.87 - 0.94 Brick, plaster 0.93 - 0.96
Plastic 0.90 Cement 0.94