La Crosse InfraScan IR 101 Instruction Manual - page 8
8
Distance to measuring spot size D:S
:
6:1
Ambient temperature range
:
32
°F to 104°F
Emission
factor
: 0.95
Power
supply
: 4
x
LR44
button cell
batteries
Battery life (approx.)
:
2000
measurements
(depending on the
usage)
Dimensions (L”xW”xH”)
:
2.25” x 1” x 4”
3. Emissions factor: The physical quantity known as the emission factor
describes to what extent the infrared heat radiation that is emitted from an
object is determined by its own temperature. Accordingly, a value of 1 tells
us that the infrared heat radiation from the object is based only on its own
temperature. A value of less than 1 means that the radiation emitted from
the object is not only determined by its own temperature but also by
reflections from neighboring bodies or due to the transmission, i.e. the
diathermancy, of the object. The emission factor thus has an effect on the
result of the measurement. The Infrared Thermometer works with an
emission factor of 0.95, i.e. the measuring unit assumes that the object
being monitored has a factor of 0.95. If this is not the case, there will be
inaccuracies in the measurement (see Section 2.6 “Measurement
Inaccuracies”).