Technical information

SYSTEM SETUP / CALIBRATION
3/31/2008 Rev. 4.3 5-6
NOTE: H
2
O span setting should not be calibrated except once every six months. However, it is
suggested that it be checked often by conducting a photosynthesis test with the “loop back” tube in
place of a leaf chamber and sampling a known humidity of the atmosphere.
Figure 5-2. Configuration using Soda Lime for CO
2
zero calibration.
Figure 5-3. Configuration using Silica Gel for H
2
O calibration.