CIRAS-3 Operation Manual V. 1.09 18 support@ppsystems.com
Is it possible to perform measurements under ambient H
2
O conditions in addition
to ambient CO
2
?
Yes and again this is quite easy. To do so make sure that the CO
2
cartridge holder is empty and that
both the soda lime and Drierite is removed from the CO
2
/H
2
O control column on the CIRAS-3 console.
The empty columns will ensure that ambient air is used for your reference air and the columns will act as
smoothing volumes. Go to Settings (F2) and select “Ambient (remove chemicals)” for CO2 Reference
and “Ambient (remove chemicals)” for H
2
O Reference. We just wanted to bring this to your attention for
future use but for this tutorial we will be controlling H
2
O using the Drierite.
Connect the PLC3 Universal Leaf Cuvette to the CIRAS-3 console
Connect the black, 4 pin electrical plug from the PLC3 to the “Signal” socket on the CIRAS-3 console. Be
careful to align the arrow on the black signal plug with the top center console socket on the CIRAS-3
console. Next connect the white pneumatic connector to the “Gas” port on the CIRAS-3. It will snap into
place. Close the cuvette head. The black link pipe should already be in place connecting the “REF IN”
and “AIR OUT” gas ports below the CO
2
source.
Connect light unit to PLC3 Universal Leaf Cuvette
Mount the light unit by aligning it to the front of the cuvette upper jaw (Step 1). Slide the light unit towards
the heat sink and fan on the top of the leaf cuvette. It should secure in place by two lock-in set screws as
shown below (Step 2). Connect electrically (Step 3).
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