CIRAS-3 Operation Manual V. 1.09  59  support@ppsystems.com 
 
The PLC3 Narrow and Conifer LED light unit is designed to mate quickly and easily with the PLC3 Conifer 
or Narrow leaf cuvette.   
Secure light unit to notches on 
cuvette head. 
Pull Light Unit over cuvette 
and secure locking screw. 
Connect electrically. 
 
 
 
Please note.  Maximum light intensity and range of temperature control is dependent on RGBW 
settings. Also, due to the distance between the LEDs in the light unit and the PLC3 Narrow and Conifer 
internal PAR sensor, maximum light intensity may be lower than 2000 µmol m
-2
 s
-1
 depending on mixture  
of red, green, blue and white LEDs. 
CFM-3 Chlorophyll Fluorescence Module 
The CFM-3 Chlorophyll Fluorescence 
Module looks very similar to the PLC3 
Universal LED Light Unit.  The major 
difference being the inclusion of all 
fluorescence associated light sources 
and detection capability that is built 
directly into the light unit.  
Attachment and connection to the PLC3 Universal Leaf Cuvette is identical to that described above with 
the PLC3 Universal LED Light Unit.  See PLC3 Universal LED Light Unit (RGBW) on page 57
. 
TIP 
The CFM-3 can also be used as an actinic light source for gas exchange measurements if required.