System Setup and Operation 
 
CIRAS-2 Operator's Manual Version 2.04 
- 44 - 
 
PLC4 (B) broadleaf (2.5 cm
2
 head plate) 
PLC4 (N) narrow leaf (10 cm
2
 head plate) 
PLC4 (C) conifer (10 cm
2
 head plate) 
PLC4 (P) pod (10 cm
2
 head plate) 
 
SRC-1 
CPY-2 
CPY-4 (146 mm diameter) 
Other 
CPY-3   5 litre Canopy Assimilation (150 mm diameter) 
CPY-3   20 litre Canopy Assimilation (300 mm diameter) 
CPY-3   100 litre Canopy Assimilation (500 mm diameter) 
CFX-1 (for soil respiration) 
CFX-2 (for soil respiration) 
Chlorophyll Fluorescence Module  
CFM (combined with PLC6 (U) LED light unit) 
[CC]  (based on open or closed system chambers) 
 
Some Accessories are no longer available.  Environmental sensors attached to Probe input such as the 
PAR  sensor  and  Soil  Temperature  Probe  are  detected  automatically  and  do  not  require  selection  as 
Accessories.  If you have any questions as to which cuvette or probe type you have, refer to the original 
paperwork  (i.e.  invoice  from  PP  Systems),  the  Appendix  at  the  back  of  this  manual  or  contact  PP 
Systems. 
Add Custom Accessory 
Primarily for use with your custom-built or existing chamber. In the Settings dialog, select the PP Systems 
Accessory  that  most  closely  matches  your  chamber.    Click  Add  custom  accessory  to  call  up  the 
Custom Chamber Type dialog.  „Chamber Base Type‟ and „Probe Base Type‟ default to your selection in 
the Accessory list.  Narrow your selection further in the „Probe Base Type‟ dropdown list. Enter a custom 
chamber [CC] name in the ‟Name‟ field and an optional Description.  Depending on the „Chamber Base 
Type‟,  additional  parameters,  such  as  System  Volume,  may  be  required.  Custom Cuvette Options is 
used for leaf cuvette and small assimilation chambers. If this is not grayed out, click the button and enter 
any „Serial Number‟ and estimated „Boundary Layer‟ and „Leaf Area‟ for the cuvette. Note that these can 
be estimated and resulting data recalculated at a later time.