User manual
  Element  Function 
1  Display  Displays infrared and real images (except 
testo 865), menus and functions 
2  Interface terminal  Contains micro USB interface for power supply 
and connection to the computer 
3 
-   key 
-  Esc key 
-  Switch camera on and off 
-  Cancel action 
4  -  OK key 
-  Joystick 
-  Open menu, select function, confirm setting 
-  Navigate within the menu, highlight function, 
select colour palette 
5 
Quick select key   
Opens the function assigned to the quick select 
key; the icon for the selected function is 
displayed bottom right 
6  Infrared camera lens; 
protective cap 
Takes infrared images; protects the lens 
7  Digital camera 
(except testo 865) 
Takes real images 
8  Laser  Marking the measuring point (only testo 872) 
9  Trigger  Saves the displayed image 
10  Battery compartment  Contains the rechargeable battery 







