TESTO 872 - Setting Emissivity and Reflected Temperature

7 Performing the measurement
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1
- Select the Scale function.
2
- Press OK.
3
- In the mode menu, move the joystick up/down until ScaleAssist is
selected.
4
- Move the joystick to the right, select Temp. In (indoor temperature).
- Move the joystick up/down to set the value.
5
- Move the joystick to the right, select Temp. Out (outdoor
temperature).
- Move the joystick up/down to set the value.
5
- If necessary, Select X, press OK to go back to the mode menu.
7
- Activate ScaleAssist: Select ✔ and press OK.

Manual scaling is activated. S is displayed at bottom right.
7.6 Setting emissivity and reflected
temperature
This function is only available if the Image type is set to infrared image.
You can choose between user-defined emissivity and 8 materials with
permanently set emissivity. The reflected temperature (RTC) can be set
individually.
Other materials can be imported into the instrument from an existing list
using the PC software.
Emissivity information:
The emissivity describes the capability of a body to emit electromagnetic
radiation. This is material-specific and must be adapted for correct
measurement results.
Non-metals (paper, ceramic, gypsum, wood, paints and coatings), plastics and
food have high emissivity, which means that the surface temperature can be
easily measured using infrared.
Because of their low or non-uniform emissivity, bright metals and metal oxides
only have limited suitability for infrared measurement. Highly inaccurate
measurements should be expected. A remedy for this is coatings that increase