PP Systems CIRAS-3 - PLC3 Series Leaf Cuvettes; LED Light Unit (RGBW)

CIRAS-3 Operation Manual V. 1.09 37 support@ppsystems.com
• The adjustable carrying harness is more comfortable with CIRAS-3, allowing convenient hands-
free operation whether in the field or greenhouse.
• Inside the console the CO
2
mixer has been completely redesigned, allowing replacement of the
dual-pump design with a single diaphragm-type air supply pump.
• CIRAS-3 now has a Li-ion one-battery system (potential field operation time up to 12 hours),
replacing the two NiMH batteries.
PLC3 Series Leaf Cuvettes
The new PLC3 Universal cuvette has several new improvements and features:
• The cuvette is smaller and lighter than its predecessor.
• Mounted to the cuvette is a practical, 2 x 16 character, black & white external LCD allowing you to
view parameters. You can also toggle between displays for additional parameters.
• Manual recording and scrolling through parameters on the external display are accomplished with
two new keys embedded in the cuvette’s open/close lever.
• A new external cosine-corrected PAR sensor (PARe) is available with all PLC3 leaf cuvettes.
This is in addition to the 2 silicon photodiode sensors beneath the cuvette window (PLC3
Universal) and 1 silicon photodiode sensor beneath the cuvette window (PLC3 Narrow and
Conifer).
LED Light Unit (RGBW)
Outwardly the LED light unit looks nearly the same as previous versions, but it is clearly much different:
• The light unit inner shroud and outer housing have been redesigned to eliminate potential light
leakage from reflecting ambient and external light sources.
• Attachment of the light unit has been improved – now the light unit mounts to the cuvette slides.
• The PLC3 Universal has an enhanced upper light intensity range up to 0-2500 µmol m
-2
s
-1
allowing replication of extreme light environments, such as high elevation and desert. Maximum
light intensity will be slightly different with the PLC3 Conifer and Narrow Leaf Cuvettes depending
on selection of LEDs at the high range.
• Resolution and stability over the entire range of light intensity has been greatly improved with
newer electronics.
• There are 48 individual LEDs representing RGBW (red-green-blue-white) color distribution for
PLC3 Universal Leaf Cuvette and 96 individual LEDs for the PLC3 Conifer and Narrow Leaf
Cuvettes. Any one of these colors may be set from 0-100% of the light source, or mixed to
produce light of a specific spectral distribution.