Fluke 566 - Manual (Page 15)

Infrared Thermometers
Menu Overview
7
• To enter an emissivity value manually:
1. Press the No. softkey.
2. Use the down or up arrow softkey to change the entry. Hold down the up or
down arrow softkey to increase the rate of change.
3. Press the Done softkey when finished to return to the main menu.
Table 3. Nominal Surface Emissivity
Material Value Material Value
Default**** 0.95 Glass (plate) 0.85
Aluminum* 0.30 Iron* 0.70
Asbestos 0.95 Lead* 0.50
Asphalt 0.95 Oil 0.94
Brass* 0.50 Paint 0.93
Ceramic 0.95 Plastic** 0.95
Concrete 0.95 Rubber 0.95
Copper* 0.60 Sand 0.90
Food - Frozen 0.90 Steel* 0.80
Food - Hot 0.93 Water 0.93
Wood *** 0.94
* Oxidized
** Opaque, over 20 mils
*** Natural
**** Factory Setting
Highlighted items may also be found in the emissivity table built into the thermometer.
° C and ° F
To toggle between ° C (Celsius) and ° F (Fahrenheit) measurements, press the Menu
softkey until ° C or ° F appears as the left softkey function. Press the corresponding
softkey to change between the measurements.
Min, Max, Avg, Differential
The thermometers can measure minimum (MIN), maximum (MAX), average (AVG), or
differential ( Δ ) temperatures each time a reading is taken. These values are not shown if a
thermocouple is plugged into the thermometer.
To turn on the Min Max mode:
1. Press the Menu softkey until MnMx (Min Max) appears as the left softkey function.
2. Press the MnMx softkey.
The display shows the present reading, maximum and minimum readings, and the
emissivity setting.
To turn on the Avg/Dif mode:
1. Press the Menu softkey until Avg appears as the right softkey function.