Fotosintesis

CIRAS-2 Portable Photosynthesis System
For Research

www.ppsystems.com

CIRAS-2 Portable Photosynthesis System
Trusted and tested technology
Measurement Ranges
CO2 CO2 0-2,000 µmol mol-1 (optimal) 0-9,999 µmol mol-1 (maximum)

CO2 and H2O Gas Analyzer
Portability
The CIRAS-2 main console is lightweight, compact and extremely rugged for demanding field research. It is powered by twolightweight, rechargeable 12V NiMH battery packs capable of running the entire system up to 6-8 hours (including LED light unit). Batteries can be easily changed in the field without the need to shut down the system.

True Differential Gas Analyzer
The CIRAS-2 is a true differential system. It features 4 independent, non-dispersive gas analyzers for accurate, simultaneous measurement of both CO2and H2O, eliminating the problems associated with “gas switching” systems. Also, for enhanced reliability, there are no moving parts such as chopper motors or filter wheels. The analyzers (reference and analysis) include an infrared source, highly polished, gold plated sample cells and detectors. The analyzers act as absorptiometers measuring infrared absorption only. The CIRAS-2 optical bench istemperature controlled and pressure compensated for the most accurate CO2 and H2O measurements under changing ambient conditions.

H2O 0-75 mb The CIRAS-2 is factory calibrated for CO2 measurements up to 9,999 µmol mol-1 as standard. The CIRAS-2 can also be used as a stand-alone CO2/H2O gas analyzer for laboratory and field applications if required.

Calibration
The design of the CIRAS-2ensures an inherent calibration stability that has been confirmed by over 25 years experience in gas analysis technology. The CO2 analyzers do not require recalibration but we do recommend periodic checks to confirm system integrity. There is an integral CO2 verification facility and external H2O calibrator for automated calibration of the H2O gas analyzers.

CO2 Control
375
CO2 (µmol mol-1)370 365 360 355 350 0 2 4 6 Time (Hours) 8

For high level research, the stability and control of CO2 is critical. The CIRAS-2 air supply unit is capable of providing stable and accurate CO2 concentrations for many hours in the field or lab.

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Independent, Automatic Control of CO2 and H2O
The CIRAS-2 system is capable of providing independent, automatic control of CO2 and H2O to the leafcuvette (reference) and within the leaf cuvette (analysis). Control of CO2 and H2O can be dynamic or pre-programmed for automatic response curve generation.
A. Electrical and gas analysis connectors (for leaf cuvette) B B. User Interface (USB, RS232 and PCMCIA slot) C A D C. Rechargeable 12V NiMH battery pack D. CO2 regulator and cartridge holder E. CO2 cartridge (8g) F. Conditioning desiccantsfor CO2 and H2O control G. Water vapor equilibrator H. Auto-zero desiccants

User Interface
The CIRAS-2 main console features an innovative user interface that includes a large, full color display (640 x 480) optimized for field use with keypad and touchpad for user inputs. It includes both a USB and RS232 serial port for transfer of stored data and for connection to an external PC. A PCMCIAslot is available for use with data storage cards (unlimited data storage).

Intuitive System Software
The system can display 15 measured and calculated parameters and graphics simultaneously in real time. The user has full control over presentation of numerical data and graphics with several recording options from simple keypress to fully automated, pre-programmed response curves. Environmentalcontrol can be changed dynamically or automatically. Management and output of stored data is very flexible with many different formats available for use with your favorite spreadsheet program. All measured and calculated data are safely stored and can easily be recalculated if required.

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CO2 Control
A built-in, removable CO2 regulator and gas cylinder holder allows for the use of...