TARGAS-1 Operation Manual V. 1.02
14
Stirring Fan
High speed fan provides efficient mixing of the air inside the leaf chamber
for rapid measurement and minimal boundary layer resistance.
Cuvette Window
18 mm x 25 mm (4.5 cm
2
)
Air Temperature
Sensor
Precision Thermistor
•
Range: 0
‐
50
o
C
•
Accuracy: ± 0.3
o
C at 25
o
C
PAR Sensor
(External)
Cosine corrected
•
Response: 400
‐
700 nm
•
Range: 0
‐
3000 μmol m
‐
2
s
‐
1
•
Accuracy: 10 μmol m
‐
2
s
‐
1
Dimensions
30 cm (L) x 3 cm (Handle Diameter)
Weight
0.7 kg
•
PP Systems is a registered trademark of PP Systems, Inc.
•
PP Systems is continuously updating its products and reserves the right to amend product
specifications without notice.
•
All brand names are trademarks or registered trademarks of their respective owners.
Light Unit (Optional)
Type
Low power LED light unit (White LEDs) easily mounts to the PLC5 Broad
Leaf Cuvette.
Control Range
0
‐
2500 μmol m
‐
2
s
‐
1
Dimensions
6 cm (L) x 6 cm (H) x 5 cm (W)
Weight
0.1 kg
•
PP Systems is a registered trademark of PP Systems, Inc.
•
PP Systems is continuously updating its products and reserves the right to amend product
specifications without notice.
•
All brand names are trademarks or registered trademarks of their respective owners.
Summary of System Design
Overview and Theory
The CO
2
/H
2
O gas analyzer is a major part of any portable photosynthesis system. The TARGAS-1
Portable Photosynthesis System features a very accurate, precise and robust CO
2
/H
2
O Gas Analyzer that
can be used as part of a powerful leaf gas exchange system (with leaf cuvette) or as a self-contained
instrument for continuous measurement of CO
2
and H
2
O in air. Its open-path design allows for
continuous, unattended air sampling, as the pump introduces fresh sample gas to the essential
component, the IRGA (infrared gas analyzer). It can also be used as an absolute gas analyzer in
“closed” mode for measurement of soil CO
2
efflux and net canopy CO
2
flux using chambers supplied by
PP Systems as well as for use with commercially available sensors for environmental monitoring
applications (PAR, soil temperature, etc.).
The IRGAs form the core of the TARGAS-1 Portable Photosynthesis System for measurement of both
CO
2
and H
2
O. Non-dispersive infra-red (NDIR) refers to the transmission of a broad-band infra-red
wavelength from the IRGA source lamps. A single IRGA consists of four basic components:
