Make sure that the  focus  of thermal channel  is adjusted correctly.  If necessary, focus  the 
thermal imaging camera with the optics (Figure 2). The turning out of the optics leads to the 
focus setting "near" and the turning in of the lens to the focus setting "infinity".  
  The visual camera (PI 200/230 only) is adjusted with the supplied focusing tool (Figure 4). 
For this purpose, the focusing tool with the two pins is placed on the visual camera and is 
focused to "near" by a left turn and focused to "infinity" by a right rotation.