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This product is no longer available and has been replaced by: CPEC310,CPEC306. Some accessories, replacement parts, or services may still be available.
CPEC300-Series Compact Closed-Path Eddy-Covariance System with EC155 and Pump Module
Services Available
Repair No
Calibration No
Free Support No

Overview

The CPEC300 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), and sample pump.

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 (United States Patent No. 9,217,692) greatly reduces maintenance and maintains frequency response compared to traditional inline filters.


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Benefits and Features

  • Compact, entry-level system with integrated CR6 running EasyFlux® DL
  • Suitable for sites with easy access to the data logger
  • Simple design for easy and quick deployment

EasyFlux® DL is a free CRBasic program for Campbell closed-path eddy-covariance systems that is available in the Downloads section. To learn more about EasyFlux® DL, visit the software product's web page.

Images

CPEC300 plumbing

Detailed Description

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.

CPEC300 System Enclosure

The 24.9 x 34.0 cm (9.8 x13.4 in.) enclosure houses the EC100 electronics and the CR6 datalogger attached to the lid of the enclosure. The CPEC300 enclosure can be mounted to a tripod mast, CM106 tripod leg base, tower legs, or a large-diameter pole.

CPEC300 Pump Module

The pump module, a standard component of the CPEC300 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 CPEC300 system enclosure, which provides power, temperature measurement and control, pressure measurement, and pumping speed measurement and control.

Specifications

Operating Temperature Range -30° to +50°C
Input Voltage Range 10.5 to 16.0 Vdc
Power
  • 12 W (typical)
  • 35 W (maximum, at cold startup)

System Enclosure
Dimensions 34 x 25 x 13 cm (13.4 x 9.8 x 5.1 in.)
Weight 4.02 kg (8.85 lb)

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)

Downloads

CR6 OS v.14.01 (8.56 MB) 26-09-2024

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?   UID (unique identifier) is now utilized for enhancing security along with other features and bug fixes. 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.

View Revision History

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

EC100 Operating System.

Watch the Video Tutorial: Updating the EC100 Operating System.

View Revision History

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

EC100-Series Support Software.

Device Configuration Utility v.2.31 (47.0 MB) 18-12-2024

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 11 or 10 (Both 32 and 64 bit)

View Revision History

EasyFlux DL for CR6CP v.1.08 (132 KB) 13-06-2024

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

View Revision History

Frequently Asked Questions

Number of FAQs related to CPEC300-Series: 5

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  1. Can the CPEC310 Scrub Module as a source of zero gas be used with the CPEC300 or CPEC306?

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

  2. Can molecular sieve be used in the future to replace bottles for gas analyzers sold before July 2017?

    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.

  3. Which countries can the molecular sieve be shipped to?

    The molecular sieve is a non-hazardous material that can be shipped to any country.

  4. Why did Campbell Scientific start using molecular sieve? Does it have the same effect as the previously used chemicals?

    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. To prepare the molecular sieve, how many grams are needed per bottle?

    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).
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