CIRAS-3 Operation Manual V. 1.09  90  support@ppsystems.com 
 
 
The following selections are available. 
CFM-3 Script Settings Editor 
Calc Fluorescence, Raw Fluorescence, Gas exchange. Depending on your 
selection of Accessory in Settings, some of these may be grayed out.   
 
Calc Fluorescence refers directly to the entire or partial list of parameters 
provided above.  
 
Raw Fluorescence refers to the instantaneous fluorescence counts that can 
be written to the data file, from 3 seconds before to 3 seconds after the 
fluorescence measurement.  
 
Gas exchange refers to gas exchange data that can be included, as part of 
each fluorescence measurement.  If you previously selected CFM-3, PLC3 
18x25 mm window (or any combination of CFM-3 and PLC3 cuvette window), 
the Calc Fluorescence box will be checked and Gas exchange will be checked 
(combined fluorescence/gas exchange enabled).   
 
Calc Fluorescence will be grayed out, indicating that fluorescence data must 
be written to the data file.  If you previously selected CFM-3, Chlorophyll 
Fluorescence Module, the Calc Fluorescence box will be checked (enabled) 
and Photosynthesis will be unchecked (disabled).  Both will be grayed out, 
indicating that only fluorescence data will be written to the data file.