Contents

Revision and Copyright Information
Limited Warranty
Assistance
Safety
Table of Contents
1. Introduction
2. Precautions
3. Installation
- 3.1 Wiring
  - 3.1.1 IRGA and Sonic Anemometer
  - 3.1.2 Fine-Wire Thermocouple
  - 3.1.3 Temperature and Relative Humidity Probe
  - 3.1.4 Radiation Measurements Option 1
  - 3.1.5 Radiation Measurements Option 2
  - 3.1.6 Precipitation Gage
  - 3.1.7 Soil Temperature
  - 3.1.8 Soil Water Content
  - 3.1.9 Soil Heat Flux Plates
  - 3.1.10 Self-Calibrating Soil Heat Flux Plates
4. Operation
- 4.1 Set Constants in CRBasic Editor and Load Program
- 4.2 Enter Site-Specific Variables with Datalogger Keypad
- 4.3 Data Retrieval
- 4.4 Output Tables
- 4.5 Program Sequence of Measurement and Corrections
5. References
Appendix A. Vapor Pressure and Dewpoint Temperature
- A.1 Equations to Calculate Dewpoint Temperature from Water Vapor Density
- A.2 Approach to Approximation of Td for the Enhancement Factor
- A.3 Dewpoint Temperature Equation
- A.4 Online Flux Program
- A.5 Reference
Appendix B. Coordinate Rotations: Double Rotation Method
- B.1 Matrix Transformation of Instrument to Flow Coordinate System
- B.2 Natural Wind Coordinated System
  - B.2.1 Covariance of Momentum Variables after Coordinate Rotation
  - B.2.2 Covariance of a Scalar Variable and Momentum Variable After Second Coordinate Rotation
- B.3 Extended Equations
- B.4 References
Appendix C. Coordinate Rotations: Planar Fit Method
- C.1 Planar Fit
- C.2 Algorithm
  - C.2.1 Variables and Model
  - C.2.2 Covariance of Momentum Variables After Two Coordinate Rotations
  - C.2.3 Covariance of a Scalar Variable with Momentum Variable After Planar Fit Coordinate Rotation
- C.3 Extended Equations
- C.4 References
Appendix D. Frequency Corrections
- D.1 Introduction
- D.2 Frequency Loss
  - D.2.1 High Frequency Loss
  - D.2.2 Low Frequency Loss
- D.3 Model for Frequency Loss Corrections
- D.4 Covariance Variables Requiring Frequency Corrections
  - D.4.1 Momentum Covariance
  - D.4.2 Sonic Temperature Related Covariance
  - D.4.3 Air Temperature Related Covariance
  - D.4.4 CO2 and H2O Related Covariance
- D.5 Sensor Configuration and Separation Variables
  - D.5.1 Path Length Variables
  - D.5.2 Separation Variables
  - D.5.3 Fine-Wire Thermocouple
- D.6 Surface Layer Atmospheric Stability
  - D.6.1 Aerodynamic Height
  - D.6.2 Obukhov Length (L)
- D.7 Cospectra
  - D.7.1 Cospectra for z/L > 0 (stable surface layer)
  - D.7.2 Cospectra for z/L 0 (neutral to unstable)
- D.8 Sub-Transfer Functions
  - D.8.1 Finite Time Block Averaging
  - D.8.2 Line Averaging
  - D.8.3 Volume Averaging
  - D.8.4 FIR Filtering
  - D.8.5 Time Constant
  - D.8.6 Spatial Separation
  - D.8.7 Total Transfer Function
- D.9 Working Model
- D.10 Programmatic Approach to Computations for Correction Factors
- D.11 References
Appendix E. WPL Corrections
- E.1 Basic Considerations
- E.2 Governing Constraint and Mean Vertical Velocity
- E.3 Eddy Covariance Measurements
  - E.3.1 CO2
  - E.3.2 H2O
- E.4 References
Appendix F. Data Quality Grading
- F.1 Relative Non-stationarity (RNcov) for Steady State
- F.2 Turbulent Conditions
- F.3 Wind Direction in the Sonic Instrument Coordinate System (wnd_dir_sonic)
- F.4 Overall Quality Grade System
- F.5 Programmatic Approach
- F.6 References
Appendix G. Footprint
- G.1 Kljun, et. al. (2004) Analytical Footprint Equations
  - G.1.1 Models and Parameters
  - G.1.2 Application of Analytical Footprint
  - G.1.3 Programmatic Approach
- G.2 Derivation of Equations for Upwind Locations at Inflection Points of Footprint in Kljun et al. (2004)
  - G.2.1 Footprint Model
  - G.2.2 Upwind location of maximum footprint
  - G.2.3 Upwind locations of inflection points
- G.3 Kormann and Meixner (2001) Analytical Footprint Equations
  - G.3.1 Footprint
  - G.3.2 Programmatic Approach
  - G.3.3 Application of analytical footprint
  - G.3.4 Programmatic Approach
- G.4 Derivation of Analytical Footprint in Kormann and Meixner (2001)
  - G.4.1 Model Derivation
  - G.4.2 Analytical expression: Vertical profile of eddy diffusivity
  - G.4.3 Analytical expression: Crosswind integrated scalar concentration distribution
- G.5 Upwind Locations at Inflection Points of Footprint in Kormann and Meixner (2001)
  - G.5.1 Footprint Model
  - G.5.2 Upwind Location of Maximum Footprint
  - G.5.3 Upwind Location of Inflection Points in Footprint Curve
- G.6 References
Appendix H. Surface Energy Flux
Appendix I. EasyFlux DL Process Flow Diagram
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Campbell Scientific EasyFlux DL CR3000OP Instruction Manual

Campbell Scientific EasyFlux DL CR3000OP Software manual cover

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Campbell Scientific EasyFlux DL CR3000OP Software Specification

The Campbell Scientific EasyFlux DL CR3000OP Software is an advanced tool designed for the efficient processing and management of eddy covariance data. It is specifically tailored to work with the CR3000 datalogger, facilitating the automated handling of complex datasets typical in micrometeorological research. The software streamlines data collection by offering a robust platform that integrates seamlessly with Campbell Scientific's hardware, ensuring compatibility and reliability.

EasyFlux DL provides a comprehensive suite of features that include real-time data acquisition, processing, and storage capabilities. It is designed to perform sophisticated calculations automatically, such as flux computations, quality control, and data correction processes, which are essential for accurate environmental assessments. The software supports various communication protocols, enhancing its flexibility in data retrieval and management across different network configurations.

The user interface is intuitive, allowing researchers to configure settings, monitor system status, and visualize data with ease. EasyFlux DL maintains high data integrity through its advanced error-checking mechanisms and supports remote access, enabling users to manage their data and system operations from virtually any location.

The software is optimized for performance on Windows operating systems and is compatible with a range of peripheral devices. This ensures scalability and adaptability in diverse research environments. Additionally, it includes features for data export in multiple formats, facilitating further analysis and reporting tasks.

Overall, Campbell Scientific EasyFlux DL CR3000OP Software is crafted to meet the demanding needs of environmental scientists, providing a reliable and efficient solution for the comprehensive management of eddy covariance data.

Campbell Scientific EasyFlux DL CR3000OP Software F.A.Q.

How do I install the EasyFlux DL CR3000OP software on my device?

To install the EasyFlux DL CR3000OP software, download the installation package from the Campbell Scientific website, run the setup file, and follow the on-screen instructions to complete the installation. Ensure that your system meets the minimum requirements before installation.

What are the system requirements for running EasyFlux DL CR3000OP?

EasyFlux DL CR3000OP requires a Windows operating system (Windows 7 or later), at least 4GB of RAM, and 500MB of free disk space. A USB port is also needed for connecting to the CR3000 datalogger.

How can I troubleshoot connection issues between the EasyFlux DL software and the CR3000 datalogger?

Check the USB connection and ensure that the datalogger is powered on. Verify that the correct communication port is selected in the software settings. Updating the USB drivers and restarting both the software and the datalogger may also resolve connection issues.

How do I configure data logging intervals in EasyFlux DL CR3000OP?

Open the EasyFlux DL software, navigate to the configuration menu, and select the 'Data Logging' tab. From there, you can set the desired logging interval, which determines how frequently data is recorded by the CR3000 datalogger.

Can I export data from EasyFlux DL to a CSV file?

Yes, you can export data to a CSV file by selecting the 'Export Data' option from the main menu. Choose the desired data range and file format, then save the file to your preferred location.

How do I update the EasyFlux DL CR3000OP software to the latest version?

Visit the Campbell Scientific website to download the latest version of EasyFlux DL CR3000OP. Run the installer and follow the instructions to update the software. It is recommended to back up your data before performing an update.

What maintenance tasks are recommended for optimal performance of EasyFlux DL CR3000OP?

Regularly check for software updates, back up your data periodically, and ensure that the USB connections are secure. Cleaning the hardware components of the CR3000 datalogger can also help maintain performance.

How can I reset the EasyFlux DL CR3000OP software settings to default?

To reset to default settings, go to the 'Settings' menu and select 'Restore Default Settings'. Confirm the action when prompted. This will revert all configurations to their original state.

What should I do if the EasyFlux DL CR3000OP software crashes frequently?

First, ensure that your system meets the software requirements. Try reinstalling the software and checking for any conflicting applications. If the problem persists, contact Campbell Scientific support for assistance.

How do I customize the data display in EasyFlux DL CR3000OP?

In the EasyFlux DL software, navigate to the 'View' menu and select 'Customize Display'. From here, you can adjust the data fields and graph settings to tailor the display to your preferences.