CPEC310 Expandable Closed-Path Eddy-Covariance System with Automatic Zero and Span
Fully Expandable Design
Provides additional ports with automatic zero and span
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Das CPEC310 ist ein schlüsselfertiges closed-path Eddy-Covariance (EC) System zum Langezeit-Monitoring der Flüsse von Kohlendioxid, Wasserdampf, Wärme und Impuls. Ein komplettes System besteht aus dem closed-path Gasanalytor (EC155 closed-path gas analyzer), 3D-Ultraschallanemometer (CSAT3A ), Datenlogger (CR6 ), Pumpe, Modul mit drei Ventilen zum autmatischen Nullabgleich von CO (H2O manuell) und Anschlussmöglichkeit für einen CDM-A116 für zusätzliche Sensoren.

Das Design des Einlasses des Gasanalysators und das kleine Probenzellvolumen (5.9 ml) wird eine excellente Frequenzantwort (4.3 Hz Grenzfrequenz) sehr geringem Stromverbrauch des Systems (12 W) möglich. Außerdem reduziert der spezielle Einlass mit Wirbel (United States Patent No. 9,217,692) die Wartung und verbessert die Frequenzantwort gegenüber herkömmlichen Filtern.

Geringere Durchflussraten ermöglichen es, dass das  CPEC310 sehr wenig Strom verbraucht (12 W). Campbell Scientific stellt alle Komponenten des CPEC310, inclusive Datenlogger und EasyFlux™ DL Software her und dadurch wird das gesamte System einfach und verlässlich.

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Funktionen und Vorteile

  • Erweiterbares high-end System mit CR6 Datenlogger und EasyFlux™ DL Software um Daten mit bis zu 20 Hz zu berechnen und zu korrigieren
  • Das Modul mit drei Ventilen ermöglicht es dem CPEC310 als einziges closed-path Eddycovarianz System auf dem Markt, einen automatischen Nullabgleich für CO2/H2O zu machen.
  • zusätzliche Anschlüsse für Energiebilanz- und Meteorologiesensoren
  • Ideales System für hohe oder niedrige Türme
  • Einfaches Design ermöglicht unkomplizierte Anwendung bei voller Funktionalität
  • Neuartige Beschichtung schützt die Ultraschall-Transducer in korrosiver Umgebung


Main enclosure for the CPEC310
CPEC310 plumbing

Technische Beschreibung

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).

Eddy-Covariance Measurements

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
  • 12 W (typical)
  • 35 W (maximum, at cold startup)

System Enclosure

Dimensions 54 x 44.5 x 29.7 cm (21.3 x 17.5 x 11.7 in.)
  • 15.36 kg (33.85 lb)
  • 16.24 kg (35.8 lb) with optional CDM-A116 module

Pump Module

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)
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)

Three-Valve Module

Inlets for Module Zero, CO2, and H2O span
Outlets Analyzer and H2O bypass
Connections ¼-in. Swagelok
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)

Scrub Module

  • 0 W (quiescent)
  • 2 W (with pump running)
  • 8 W (with heater running)
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)


CR6 OS v.11.01 (7.59 MB) 24-05-2021

This download is for the CR6 datalogger. Execution of this download places the Operating System file(.obj) on your computer. It also updates the CRBasic Editor compiler and support files. 

Why Update?  Along with new features and bug fixes, this OS contains a changes related to WebSocket's, GOES, FileManage() and MQTT. With this OS update it is recommended that you also update the Device Configuration Utility to the most recent version so that new datalogger features are available in the utility.  

Note: Campbell Scientific always recommends updating operating systems on site if possible. When remote updates are required, it is recommended that you implement the necessary precautions to handle unexpected OS upload complications. All datalogger settings should be retained when updated remotely. If you choose to roll back to a previous operating system, the datalogger settings will be reset to default.

Watch the Video Tutorial: Sending an OS to a Local Datalogger.

Liste der Änderungen

EC100 OS v.8.02 (560 KB) 14-10-2019

EC100 Operating System.

Watch the Video Tutorial: Updating the EC100 Operating System.

Liste der Änderungen

ECMon v.1.6 (10.7 MB) 29-03-2016

EC100-Series Support Software.

Device Configuration Utility v.2.26 (44.8 MB) 16-03-2021

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)

Liste der Änderungen

EasyFlux DL for CR6CP v.1.03 (116 KB) 05-08-2019

CR6 datalogger program for Campbell closed-path eddy-covariance systems.

Note: This version corrects the compile error that the previous version had with the GPS instruction.

Liste der Änderungen

CSAT3H Heater Controller v.14.2 (46 KB) 02-02-2021

The CSAT3H Heater Controller ships with this encrypted program. This program is for the unlikely event that the program needs to be re-installed or updated to a newer version. Please contact Campbell Scientific if you have questions about the program or would like the algorithm modified for a specific application.

FAQs für

Number of FAQs related to CPEC310: 6

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  1. No. A valve module is required to use the Scrub Module. Only the CPEC310 comes with a valve module.

  2. The bottles of sieve for drop-in replacement contain the pellets and a membrane on top. The membrane is necessary to keep the pellets contained while allowing gas to pass over the zeolite. The bottle has the same footprint as the old magnesium perchlorate bottles. The amount in each bottle is listed on the bottle. The amount of sieve needed for each analyzer is the following:

    • The EC150 needs 22 g (drop-in bottle).
    • The IRGASON® needs 22 g (drop-in bottle).
    • The EC155 needs 22 g (drop-in bottle).
    • The AP200 needs 500 g (refill).
    • The 27423 needs 1000 g (refill).
    • The 31022 needs 500 g (refill).
  3. The molecular sieve is a non-hazardous material that can be shipped to any country.

  4. The molecular sieve has been demonstrated here by our engineering department to be effective at removing CO2 and H2O from the air sample. The change was made for two reasons:

    1. It was a safer alternative than using the previous chemicals.
    2. Increased shipping regulations for the chemicals limited the number of suppliers. 
  5. The molecular sieve is a direct replacement for the old magnesium perchlorate bottles. The molecular sieve may be used for any Campbell Scientific analyzer that used the old bottles.