Thiết bị phân tích CO2 và H2O Campbell Scientific CPEC310
The CPEC310 with EasyFlux® is a turn-key, closed-path eddy-covariance (EC) flux system for long-term monitoring of atmospheric-biosphere exchanges of carbon dioxide, water vapor, heat, and momentum. A complete system consists of a closed-path gas analyzer (EC155 closed-path gas analyzer), sonic anemometer (CSAT3A sonic anemometer), data logger (CR6 datalogger), sample pump, three-valve module that enables automatic zero and CO2 span measurements (manual H2O span), and accommodations for a CDM-A116 analog input expansion module allowing for additional sensors.
The gas analyzer’s patented vortex intake design (United States Patent No. 9,217,692) and small sample cell volume (5.9 mL) provide a much lower flow rate than other closed-path systems while maintaining excellent frequency response (4.3 Hz cutoff frequency). Additionally, this design makes the system virtually maintenance free while still maintaining an ideal frequency response compared to traditional inline filters. Lower flow allows the CPEC310 to have one of the lowest total system power requirements (12 W) of any closed-path eddy covariance system. Campbell Scientific manufactures all components of the CPEC310, including the data logger and EasyFlux® DL software for computing and correcting fluxes, which gives our system the most reliable functionality.
Benefits and Features
- New conformal coating helps protect sonic transducers in corrosive environments
- Expandable, high-end system with CR6 datalogger processing power and EasyFlux® DL software to compute and fully correct up to 20 Hz data
- The 3-valve module makes the CPEC310 the only closed-path eddy covariance system on the market with the ability to perform automatic zero and CO2/H2O span
- Additional port options for energy balance and atmospheric sensors
- Ideal system for short or tall towers
- Simple design provides easy use while maintaining full functionality
The gas analyzer’s small sample cell volume (5.9 mL) minimizes the sample residence time (50 ms at the system’s nominal flow rate, 7 LPM). This gives excellent frequency response (5.8 Hz half-power bandwidth) with low total system power (12 W).
CO2 and H2O are measured with an EC155 Closed-Path Gas Analyzer. Three-dimensional wind speed and sonic air temperature are measured with a CSAT3A sonic anemometer head.
CPEC310 System Enclosure
The CPEC310 has two enclosures: a fiberglass enclosure that houses the CR6 datalogger, pump module, three-valve module, and optional CDM-A116, and the EC100 enclosure for data processing. The CPEC310 can also be equipped with a scrub module for automatic zeroing of the EC155.
CPEC310 Pump Module
The pump module, a standard component of the CPEC310 system, consists of a small dual-head diaphragm pump with a brushless dc motor mounted inside a fiberglass enclosure. An integral cable connects the pump module to the CPEC310 system enclosure, which provides power, temperature measurement and control, pressure measurement, and pumping speed measurement and control.
|Operating Temperature Range||-30° to +50°C|
|Input Voltage Range||10.5 to 16.0 Vdc|
|Dimensions||54 x 44.5 x 29.7 cm (21.3 x 17.5 x 11.7 in.)|
|Inlet Connection||3/8-in. Swagelok|
|Pressure Sensor Range||15 to 115 kPa|
|Pumping Speed||3 to 9 LPM (automatically controlled at the set point, typically 7 LPM)|
|Inlets for Module||Zero, CO2, and H2O span|
|Outlets||Analyzer and H2O bypass|
|Dimensions||14.0 x 12.7 x 14.0 cm (5.5 x 5.0 x 5.5 in.)|
|Weight||1.5 kg (3.3 lb)|
|Cylinder Volume||480 cm3 each (29.29 in.3 each)|
|Molecular Sieve Size||1.6 to 2.5 mm beads (0.063 to 0.098 in. beads)|
|Enclosure Dimensions||39.4 x 34.3 x 20.3 cm (15.5 x 13.5 x 8.0 in.)|
|Weight||9.6 kg (21.1 lb)|