Milwaukee Tool 2260-21NST - Manual (Page 21)

M12 160x120 Thermal Imager Operator's Manual 19
Manual Range and Auto Range
When you turn on the Thermal Imager, it is always in AUTO
RANGE mode. This means that it automatically selects the
lowest temperature and highest temperature in its range
to make thermal images. Usually, this produces the best
results. However, if you want to use a narrower or wider
temperature range, you can select MANUAL RANGE.
Typical reasons for selecting MANUAL RANGE:
•
An area in the field of view that you want to focus on
has a narrow range of temperatures, and you want to
be able to resolve these small differences. For this,
you would set a narrower MANUAL range than AUTO
RANGE.
• There is one extremely hot point in the field of view,
and you want to make sure that it gets measured. For
this, you would set a wider MANUAL range than AUTO
RANGE.
• There are both very cold and very hot objects in the
field of view, and you want to make sure to measure
both temperature extremes. For this, you would set a
wider MANUAL range than AUTO RANGE.
Table 5. Menu Choices for Target Materials and their
Corresponding Emissivity Ratios
Material in
Emissivity Menu
Corresponding
Emissivity Ratio
ALUMINUM 0.30
ASPHALT 0.95
BRICK 0.83
CONCRETE 0.95
COPPER 0.60
IRON 0.70
OIL (PETROLEUM) 0.94
PAINT 0.93
RUBBER 0.95
SAND 0.90
SOIL 0.92
STEEL 0.80
WATER 0.93
WOOD 0.94