Testo 882 , 33 Hz thermography camera, -20 to +350 °C, 320 x 240 pix bolometer matrix 0560 0882 User Manual

6 Using the product 

28 

-  The changes are saved. 

 

Select display options 
The presentation can be adapted by means of showing/hiding the 
following elements: Crosshairs, temperature scale and quick select 
buttons. 
Hidden function keys can be shown again by pressing a quick 
select button: The first press of the button shows the function keys 
again. To trigger a function, the button must be pressed again.  
1.

 

| 

 | 

. 

- The 

 dialogue is opened. 

2. Move 

 up/down to select the desired option. 

-  The selected option has an orange border ( ). 

3.

  Activate (

) or deactivate (

) option with 

. 

4.

  Confirm settings with the 

 quick select button. 

or 
Discard settings with 

. 

 

Emissivity 
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 are only somewhat suited for infrared measurement. 
You must anticipate highly inaccurate measurements. A remedy for 
this is coatings that increase the emissivity, e.g. paint or emission 
adhesive (art. no. 0554 0051) which must be applied to the object 
being measured. 
The following table gives typical emissivities of important materials. 
These values can be used as orientation with the user-defined 
settings.