Recalculate Data 
 
CIRAS-2 Operator's Manual Version 2.04 
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Recalculation Values 
 
 
PAR.  This is typically ghosted out and should only be 
available when using our “Manual” style cuvettes  and 
PAR was manually entered and not measured. 
Boundary  Layer  resistance  of  Cuvette.  The  value 
depends  upon  the  type  of  cuvette  supplied.    The 
factory  default  value  can  be  found  on  the  cuvette 
handle or packing list supplied with the system.  
The  transmission  characteristics  of  the  cuvette 
window.  This  value  is  different  for  each  type  of 
cuvette  and  is  automatically  set  by  the  CIRAS-2  by 
default when selected in the Parameters Editor dialog. 
This value should not require changing. 
The ratio of stomata on the upper and lower surface 
of the leaf.  Please note that the ratio is in terms of 
the upper leaf.  During recalculation, the value should 
be entered as a percentage of 1 (i.e. 50% Stomata on 
top surface should be entered as 0.50). 
Flow rate of the integral air supply.  If the CIRAS-2 air 
supply  is  used,  there  should  be  no  need  to  change 
this value.  If an external air supply is used, this value 
may require changing. 
Leaf  Temperature.      If  set  to  Energy  Balance,  leaf 
temperature  is  automatically  recalculated.    If  set  to 
Use Existing, recalculation does not occur.  
 
   
 
Review information relating to the CIRAS-2, data, graphics, etc.  . 
Review any information/comments associated with a particular record (treatment).   
 
 
Information 
There are 5 tabs (windows) associated with the Information window.  To get to this window, click on the 
Session button when the CIRAS-2 Photosynthesis Recalculation dialog is open: