The CPEC200 is a turn-key, closed-path eddy-covariance (EC) flux system for long-term monitoring of atmosphere-biosphere exchanges of carbon dioxide, water vapour, heat, and momentum. A complete system consists of a closed-path gas analyzer (EC155 closed-path gas analyzer with updated vortex intake design), sonic anemometer (CSAT3A sonic anemometer), datalogger (CR3000 datalogger), and sample pump. A valve module is also available for automated zero and span.
The gas analyzer’s intake design and small sample cell volume (5.9 mL) provide excellent frequency response (4.3 Hz cutoff frequency) with low total system power (12 W). Additionally, the vortex intake greatly reduces maintenance and maintains frequency response compared to traditional inline filters.Read More
|Operating Temperature Range||-30° to +50°C|
|Input Voltage Range||10.5 to 16.0 Vdc|
|Dimensions||52.1 x 44.5 x 29.7 cm (20.5 x 17.5 x 11.7 in.)|
|Inlet Connection||3/8-in. Swagelok|
|Pumping Speed||3 to 9 LPM (automatically controlled at the setpoint, typically 7 LPM)|
|Pressure Sensor Range||15 to 115 kPa|
|Cable Length||3.0 m (10 ft)|
|Dimensions||35.6 x 29.2 x 13.5 cm (14.0 x 11.5 x 5.3 in.)|
|Weight||5.4 kg (11.8 lb) without mounting bracket|
|Inlets for Three-Valve Module||Zero, CO2, span, and H2O span|
|Inlets for Six-Valve Module||Zero, CO2 span 1 to CO2 span 4, 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 of Three-Valve Module||1.5 kg (3.3 lb)|
|Weight of Six-Valve Module||1.9 kg (4.2 lb)|
|Cylinder Volume||480 cm3 each (29.29 in.3)|
|Molecular Sieve Size||1.6 to 2.5 mm 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)|
Execution of this download installs the CR3000 Operating System and Compiler on your computer. It also updates the CR3000 support files for the CRBasic Editor.
Note: The Device Configuration Utility is used to upload the included operating system to the datalogger.
Upgrading from versions prior to version 28 of the Operating System will reset the datalogger’s CPU drive. This is due to a change in the format of the file system from FAT16 to FAT32. In order for the datalogger to operate correctly, as part of the upgrade, the CPU drive is formatted to FAT32. Any programs stored and running from the CPU drive will be lost. It is not recommended to update the datalogger’s Operating System over a remote connection where program control regulates the communication equipment (turning it on or off, etc.). In these cases, an on-site visit and a backup using DevConfig’s backup utility is necessary to update the datalogger’s Operating System.
In all cases where the datalogger is being updated from an Operating System prior to 28, the use of DevConfig’s backup utility is recommended due to the CPU drive being formatted using the new FAT32 format.
A software utility used to download operating systems and set up Campbell Scientific hardware. Also will update PakBus Graph and the Network Planner if they have been installed previously by another Campbell Scientific software package.
Supported Operating Systems:
Windows 10, 8.1, 8, and 7 (Both 32 and 64 bit)
Micrometeorology Group (435) 227-9100.
EC100 Operating System.
EC100-Series Support Software.
Number of FAQs related to CPEC200: 15
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The pump module fan continues to draw 0.7 W while operational.
The heater for the CPEC200 is not positioned along the intake pipe. The heater is in the "snout/rain-cap" of the vortex intake.
There is no heater along the intake pipe of the CPEC200. An air gap insulates the intake pipe (1/8 in. OD) from the outer shell (1/2 in.ID), so the air traveling down the intake tube retains most of the heat absorbed at the intake.
Yes, the pump works a little harder with the new vortex. The recommended flow for the new vortex system is 8 LPM (6 to sample cell + 2 to bypass). 7 LPM was recommended for the original system. Also, the sample cell “differential” pressure is slightly lower (~-6kPa_new versus ~-3kPa_original). It’s a balance of parameters to maintain good frequency response, low power, and low maintenance.
Yes, the heater is controlled the same way. Campbell Scientific recommends leaving the heater on all the time.
Yes. For more information, refer to the "CPEC200 Scrub Module Installation, Operation and Maintenance" appendix in the CPEC200 Closed-Path Eddy-Covariance System Instruction Manual.
If the pump fails, it must be replaced. Contact Campbell Scientific for details. For the process of returning equipment to Campbell Scientific, refer to the Repair and Calibration page.
It is easy to learn how to cut tubing to length and swage the fittings. However, if it is preferred, order tubing assemblies cut to a specified length using pn 21823-L, Calibration Gas Tubing Assembly.