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Fluke 561s User Manual

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561 
Users Manual 
8 
 
Table 2. Surface Emissivity 
Measured 
Surface 
Switch Setting 
Measured 
Surface 
Switch Setting 
Aluminum  
Iron, 
Cast   
Oxidized Low 
Oxidized  High, 
Medium 
Alloy A3003 
 
Unoxidized 
Low 
Oxidized Low 
Molten 
Low 
Roughened Low 
Iron, Wrought 
 
Brass 
 Dull 
High 
Burnished Low 
Lead 
 
Oxidized Low 
Rough 
Low 
Copper 
 Oxidized 
Low, 
Medium 
Oxidized Medium Molybdenum 
 
Electrical Terminal 
Blocks 
Medium Oxidized Low, 
Medium 
Haynes 
 Nickel 
 
Alloy Medium 
Oxidized 
Low 
Inconel 
 
Platinum 
 
Oxidized High, 
Medium 
Black 
High 
Sandblasted Medium 
Steel 
 
Electoropolished Low 
Cold-Rolled 
High 
Iron 
 Ground 
Sheet 
Medium 
Oxidized High, 
Medium 
Polished Sheet 
Low 
Rusted Medium Zinc 
 
  Oxidized 
Low 
Switching Between 
°
C and 
°
F 
Open the battery compartment and locate the switch positioned between the left side of the 
battery near the Thermometer wall. To toggle between 
°
C and 
°
F, use a small screwdriver or 
paper clip to move the switch to the desired position. See Figure 7.