Metrohm NIRS XDS Process Analyzer – DirectLight/NonContact User Manual
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Turn off the lamp, by disconnecting the instrument in the software (Acquire/ Disconnect) and
answer yes to the following question. Move the paddle to the indicated position in figure 2
manually.
Disconnect the blue fibre bundle from the Optical tube and with the help of the enclosed LED
lamp shining in the direction of the arrow adjust the Optical tube so the illuminated light spot
is within the standardisation sample placed in the standardisation fixture at the desired
distance “h”.
When satisfied secure the angle by
fastening the allen screw at the lens holder.
Optical assembly with paddle in position for
adjusting the fiber angle. Left arrow
indicates where the LED should shine.
Adjusting screw on the optical tube. The
right arrow indicates the screw for a
possible adjustment of the internal mirror.
Light spot misaligned for visual purposes.
5.
Move the paddle manually to reference position
6.
The internal mirror have to be adjusted so that the light illuminates the reference tile
correctly. The mirror is adjusted so that the light and brightest part is in the middle of the
reference tile ( h= 100 mm). This is already done at delivery, but may have to be checked
especially if h= 250 mm
7.
Select Acquire/Connect. Choose Data Collection Method. Click “OK”.