7
5. Setting the Backlight
While the power is on, press the backlight ON/OFF key to set the backlight on or off.
While the backlight key is on, the LCD is illuminated in green so that the value displayed on the
LCD can be easily read even in dark places. While the backlight key is off, the backlight is not lit.
Note: While the backlight is on, the battery will be consumed faster.
6. Emissivity
The emissivity of this thermometer is fixed at 0.95.
Infrared radiation is naturally emitted from all objects, but the emissivity value depends on the type
of object to be measured. However, various objects including food and plastic have been shown to
have an emissivity of 0.95, so emissivity of 0.95 can be used for measuring the temperatures of
such objects by this thermometer.
Emissivity Table
The table below lists the typical emissivity of different types of materials. (The values are
presented only for reference; the emissivity varies with the temperature and surface conditions of
objects.)
Object
Emissivity
Object
Emissivity
Object
Emissivity
Meat
0.98
Grains
0.98
Skin
0.97
Fish
0.98
Oil
0.98
Water
0.98
Vegetable
0.98
Plastic
0.95
Soil
0.95
Bread
0.98
Rubber
0.95
Wood
0.98
Confectionery
0.98
Concrete
0.95
Paper
0.92
7. How to measure
1) Take off the lens cap from the measurement window first.
2) Prior to measurement, set both the laser marker and backlight.
3) Direct the thermometer at an object and press the measurement key.
The measured temperature is displayed on the LCD.
NB.: Infrared rays in this measurement wavelength range do not penetrate glasses. When
measuring the object through the glass, it detects the surface temperature of the glass.
4) Release the measurement key. The displayed value can be held for approximately five
seconds.
5) After five seconds, the power is automatically turned off (auto power-off function).
6) When the measurement is finished, put the lens cap on the measurement window.
