Page 60
thermoMETER TIM 8 / thermoIMAGER TIM 40
Fig. 34 Plastic sticker at metal surface
Now set the emissivity to 0.95 and take the temperature of the sticker.
Afterwards, determine the temperature of the adjacent area on the measuring object and
adjust the emissivity according to the value of the temperature of the sticker.
3
Cover a part of the surface of the measuring object with a black, flat paint with an emissivity
of 0.98.
Adjust the emissivity of your infrared thermometer to 0.98 and take the temperature of the
colored surface.
Fig. 35 Shiny metal surface
Fig. 36 Blackened metal surface
Afterwards, determine the temperature of a directly adjacent area and modify the emissivity
until the measured value corresponds to the temperature of the colored surface.
i
On all three methods the object temperature must be different from ambient temperature.
