CIRAS-3 Operation Manual V. 1.09  58  support@ppsystems.com 
 
First, mount the light unit by 
aligning it to the front of the 
cuvette upper jaw as shown 
below. 
Slide the light unit back towards 
the heat sink and fan on the leaf 
cuvette locking it in place using 
the two set screws shown below. 
Connect electrically. 
 
 
 
 
PLC3 Narrow and Conifer LED Light Unit 
This LED light unit for the PLC3 Narrow and Conifer 
leaf cuvettes feature 96 LEDs, 24 each of RGBW 
(red-green-blue-white) color.  You are able to set 
any single color from 0-100% of the light source, or 
you can combine colors in any proportion to 
recreate the spectral distribution of a specific 
natural or artificial light source.  With full power 
available to the cuvette the normal intensity output 
range will be 0-2000 µmol m
-2
 s
-1
 (ranges are 
dependent on selection of red-green-blue-white 
LEDs).  
 
Caution: do not look directly at illuminated LEDs, even with the light unit set 
to lower intensity control levels.