LumaSense Technologies IGA 320/23-LO - Manual (Page 18)

IGA 320/23-LO Operating Manual Controls and Connections 18
If the LED is switched on, its smallest spot is in the measuring distance of the corresponding
optics or adjusted distance and it marks the center of the spot.
3.5.3 Adjusting the required measuring distance with optical head ,
focusable
To adjust the correct measuring distance,
untighten the fixing nut and vary the length of
the optical head by turning the lens tube. When
correctly focused, the LED has its smallest spot size
(sharpest image). After adjustment, tighten the
fixing nut.
Fixing nut Inner tube Lens tube