Fluke 56X - Manual (Page 19)

Infrared Thermometers
566/568 Display
11
Table 4. Nominal Surface Emissivity (566/568)
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.
2. Press the Avg softkey.
The display shows the present reading, average reading, the differential reading
between max and min (designated by Δ ), and the emissivity setting.