Contents

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Table of contents
1. Introduction
2. Precautions
3. Installation
- 3.1 Wiring
  - 3.1.1 IRGA and sonic anemometer
  - 3.1.2 VOLT 116 module
  - 3.1.3 GPS receiver
  - 3.1.4 Fine-wire thermocouple
  - 3.1.5 Temperature and relative humidity probe
  - 3.1.6 Radiation measurements, Option 1
  - 3.1.7 Radiation measurements, Option 2
  - 3.1.8 Precipitation gage
  - 3.1.9 Soil temperature
  - 3.1.10 Soil water content reflectometers
  - 3.1.11 Soil heat flux plates
  - 3.1.12 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 data logger keypad or LoggerNet
- 4.3 Data retrieval
- 4.4 Output tables
- 4.5 Program sequence of measurement and corrections
5. References
Appendix A. Vapor pressure and dew point temperature
- A.1 Equations to calculate dew point temperature from water vapor density
- A.2 Approach to approximation of Td for the enhancement factor
- A.3 Dew point 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 coordinate 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 covariances
- 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 Monin-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 surface layer)
- 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 Turbulence conditions
- F.3 Wind direction in the sonic instrument coordinate system (wnd_dir_sonic)
- F.4 Overall quality grade system
- F.5 Programmatic procedure to grade data quality
- 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 to determining footprint characteristics
- G.2 Derivation of equations for upwind locations at inflection points of footprint in Kljun et al. (2004) (KCRS)
  - G.2.1 KCRS footprint model
  - G.2.2 Upwind location of maximum footprint
  - G.2.3 Upwind locations of inflection points
- G.3 Kormann and Meixner (2001) (KM) analytical footprint equations
  - G.3.1 KM footprint model
  - G.3.2 Programmatic approach
  - G.3.3 Application of analytical footprint
  - G.3.4 Programmable algorithms
- 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 KM 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 CR6OP or CR1KXOP process flow diagram
- I.1 Sequence of program functions
  - I.1.1 Every SCAN_INTERVAL (default 100 ms)
  - I.1.2 Every SLOWSEQUENCE_SCAN_INTERVAL (default 5 sec)
  - I.1.3 Every 5 min
  - I.1.4 Every AVERAGING_INTERVAL (default 30 min)
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Campbell Scientific EasyFlux DL CR1KXOP Instruction Manual

Campbell Scientific EasyFlux DL CR1KXOP Software manual cover

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Campbell Scientific EasyFlux DL CR1KXOP Software Specification

The Campbell Scientific EasyFlux DL CR1KXOP Software is an advanced tool designed for professionals in the field of environmental monitoring, specifically for handling data from Campbell Scientific's CR1000X dataloggers. This software streamlines the process of collecting, processing, and analyzing eddy covariance data, making it a crucial component for researchers and scientists studying atmospheric and terrestrial ecosystems.

EasyFlux DL CR1KXOP is tailored to automate the complex tasks associated with data retrieval and processing, thus enhancing efficiency and accuracy in measuring carbon dioxide, water vapor, and energy fluxes. It leverages the robust capabilities of the CR1000X dataloggers, allowing for seamless integration and communication. The software facilitates real-time data acquisition, ensuring that users have immediate access to critical environmental metrics.

One of the standout features of the EasyFlux DL CR1KXOP is its user-friendly interface, which simplifies the setup and configuration processes. Despite its technical sophistication, the software is accessible to users with varying levels of expertise. It supports comprehensive data management, including the configuration of datalogger programs, data storage, and retrieval. Moreover, it offers extensive data processing capabilities, which include data quality control, gap-filling, and flux computation.

The software is designed to operate efficiently in various environmental conditions, demonstrating high reliability and performance. It supports a range of communication options, ensuring flexibility in data handling and transfer. EasyFlux DL CR1KXOP is an indispensable tool for environmental data analysis, providing users with the ability to perform detailed and accurate assessments of ecological systems.

Campbell Scientific EasyFlux DL CR1KXOP Software F.A.Q.

How do I install the EasyFlux DL CR1KXOP Software?

To install the EasyFlux DL CR1KXOP Software, download the installer from the Campbell Scientific website, run the executable file, and follow the on-screen instructions to complete the setup process. Ensure that your system meets all the software requirements before installation.

What should I do if the EasyFlux DL CR1KXOP Software won't start?

Ensure that your computer meets the minimum system requirements and that all necessary drivers are installed. Try restarting your computer and running the software as an administrator. If the problem persists, reinstall the software or check for updates from Campbell Scientific.

How can I update the EasyFlux DL CR1KXOP Software?

Check the Campbell Scientific website for the latest version of the EasyFlux DL CR1KXOP Software. Download the update package and run the installer, following the on-screen instructions to complete the update process. Ensure you back up any important data before updating.

Can I customize data collection intervals in EasyFlux DL CR1KXOP?

Yes, you can customize data collection intervals in the EasyFlux DL CR1KXOP Software. Navigate to the settings menu, select the data collection options, and adjust the interval settings according to your monitoring needs.

How do I troubleshoot connectivity issues with the CR1KXOP logger?

Check all physical connections and ensure that the logger is powered on. Verify network settings and ensure that the correct communication port is selected in the software. You may also need to check firewall settings or consult the user manual for further troubleshooting steps.

What maintenance is required for the EasyFlux DL CR1KXOP Software?

Regularly check for software updates and install them to ensure optimal performance. Perform routine backups of your data and settings. Review and clean up data logs periodically to prevent storage issues.

How can I export data from EasyFlux DL CR1KXOP for analysis?

Use the export function in the software to select the data you want to export. Choose the desired file format (e.g., CSV, Excel) and specify the export location. Follow the prompts to complete the export process.

Is there a way to reset the EasyFlux DL CR1KXOP Software to default settings?

Yes, navigate to the settings menu and look for an option to restore default settings. Confirm your selection, and the software will reset to its original configuration. Be sure to backup any important data beforehand.

How do I configure sensor inputs in the EasyFlux DL CR1KXOP Software?

Access the sensor configuration menu within the software, select the appropriate sensor input, and enter the necessary parameters as per your sensor specifications. Save the configuration to apply the changes.

What steps should I take if I encounter a software error in EasyFlux DL CR1KXOP?

Document the error message and note any actions that led to the error. Restart the software and attempt to replicate the issue. If it persists, consult the support documentation or contact Campbell Scientific technical support for assistance.