CIRAS-3 Operation Manual V. 1.09 53 support@ppsystems.com
PLC3 Series Leaf Cuvettes
There are 3 standard leaf cuvettes commonly used with the CIRAS-3 for measurement of leaf gas
exchange:
PLC3 Universal Leaf
Cuvette
For measurement on flat, broad
leaves. It is supplied as standard
with 3 windows measuring 25 x 7
mm, 25 x 18 mm and 18 mm
diameter.
PLC3 Narrow Leaf Cuvette
For measurement on grasses, long
needles and narrow leaves.
PLC3 Conifer Leaf Cuvette
For measurement on conifers and
short needle vegetation.
All 3 PLC3s connect to the PLC “Gas” and “Signal” connectors on the CIRAS-3 console. Prior to use,
make sure that the gas and signal connections are made and that the appropriate PLC is selected under
Accessory in the Settings dialog. When selected, the default values for that leaf cuvette will be used.
This is very important as there are some differences between the PLC3s. All 3 leaf cuvettes have a
similar handle, electronics, sensors, LCD, record (R) and switch (S) keys on the open/close lever,
ambient temperature sensor, temperature control range and external PAR sensor. Measurements can be
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