CPEC306 Erweiterbares Closed-Path Eddy-Covariance System mit EC155 und Pumpenmodul
Für Wasserdampf- und CO2
Zusätzliche Anschlussmöglichkeiten, ohne automatische Null- und Bereichskalibierung
wetter  wasser  energie  gas flux and turbulence  bauwerke  boden


Das CPEC306 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 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.

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Funktionen und Vorteile

  • Erweiterbares Kompaktsystem mit CR6 Datenlogger
  • Geeignet für Standorte mit vielen Sensoren oder einem Turm
  • Einfaches Design für problemlosen Betrieb


Main enclosure for the CPEC306
CPEC306 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.

CPEC306 System Enclosure

The CPEC306 has two enclosures: a fiberglass enclosure that houses the CR6 datalogger, pump module, and optional CDM-A116, and the EC100 enclosure for data processing.

CPEC306 Pump Module

The pump module, a standard component of the CPEC306 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 CPEC306 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.)
  • 13.72 kg (30.25 lb)
  • 14.6 kg (32.2 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)


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.1.04 (121 KB) 22-11-2021

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

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 CPEC306: 5

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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.