Observing and Recording Leaf Gas Exchange 
 
CIRAS-2 Operator's Manual Version 2.04 
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Recording Options 
Click Recording Options to open the Response Curve – Control Settings dialog box.  Please note:  
the Control Types entered here will be applied only during the Response Curve, and reset to the previous 
settings upon completion. 
 
Repeat 
Beneath the „Repeat‟ field click the  ► button to choose the number of measurements to be recorded at 
each level.  Later, this will be important for producing means when you process your data.   
 
Interval 
The amount of time (seconds) between records. 
 
Zero Settle Time 
This applies to the initial settling of the Response Curve measurement and any settle that is caused by a 
Zero or Diff Bal that occurs during the Response Curve.  Zero Settle Time differs from the Level Settle 
Time set in the Response Editor.