Milwaukee M12 IR Operator's Manual download pdf (Page 21)

M12 160x120 Thermal Imager Operator's Manual 19

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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 eld 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 eld 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

eld 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

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Milwaukee M12 IR Operator's Manual Page 21