Contents

Revision and Copyright Information
Table of Contents
1. Introduction
2. Precautions
3. Initial Inspection
4. Overview
- 4.1 General
- 4.2 Features
- 4.3 Gas Head Memory
- 4.4 Self-diagnostics and Data Integrity
- 4.5 Field Zero/Span Capabilities
- 4.6 EC100 Electronics Module
  - 4.6.1 EC100 Communications and Control
  - 4.6.2 EC100 Outputs
    - 4.6.2.1 SDM Output
- 4.7 Automatic Heater Control
- 4.8 Theory of Operation
5. Specifications
- 5.1 Measurements
- 5.2 Output Signals
- 5.3 Physical Description
- 5.4 Power Requirements
6. Installation
- 6.1 Orientation
- 6.2 Mounting Analyzer to Support Hardware
  - 6.2.1 Preparing the Mounting Structure
  - 6.2.2 Mounting EC150 with Optional CSAT3A
  - 6.2.3 Mounting EC150 without CSAT3A
  - 6.2.4 Attaching EC100 Electronics Enclosure to Mounting Structure
  - 6.2.5 Install the EC150 Temperature Probe
- 6.3 Wiring and Connections
  - 6.3.1 Connecting the EC150 Gas Analyzer Head
  - 6.3.2 Connect the CSAT3A Sonic Head
  - 6.3.3 Connect the EC150 Temperature Probe
  - 6.3.4 Ground the EC100 Electronics
  - 6.3.5 Connect SDM Communications to the EC100
  - 6.3.6 Wire Power and Ground the EC100
- 6.4 Data Collection and Data Processing
  - 6.4.1 Data Collection and Processing with EasyFlux DL
  - 6.4.2 Data Logger Programming with CRBasic
7. Zero and Span
- 7.1 Introduction
- 7.2 Zero-and-Span Procedure
8. Maintenance and Troubleshooting
- 8.1 Routine Site Maintenance
- 8.2 Gas Analyzer Wicks
- 8.3 Cleaning Analyzer Windows
- 8.4 Zero and Span
- 8.5 Replacing CO2 Scrubber Bottles
- 8.6 Factory Recalibration
- 8.7 Troubleshooting
  - 8.7.1 Data Loss During Precipitation Events
  - 8.7.2 EC100 Diagnostics for Gas Analyzer Troubleshooting
  - 8.7.3 LED Status Lights
  - 8.7.4 Diagnostic Flags
Appendix A. EC150 Settings
- A.1 Factory Defaults
- A.2 Details
  - A.2.1 SDM Address
  - A.2.2 Bandwidth
  - A.2.3 Unprompted Output
  - A.2.4 Unprompted Output Rate
  - A.2.5 RS-485 Baud Rate
  - A.2.6 Analog Output
  - A.2.7 ECMon Update Rate
  - A.2.8 Temperature Sensor
  - A.2.9 Fixed Temperature Value
  - A.2.10 Pressure Sensor
    - A.2.10.1 Pressure Gain
    - A.2.10.2 Pressure Offset
    - A.2.10.3 Fixed Pressure Value
  - A.2.11 Pressure Differential Enable
  - A.2.12 Heater Control
  - A.2.13 Head Power Off
- A.3 ECMon
- A.4 Device Configuration Utility
- A.5 EC100Configure() Instruction
  - A.5.1 ConfigCmd 11 Zero-and-Span Control
- A.6 Example CRBasic Program
Appendix B. Filter Bandwidth and Time Delay
Appendix C. Alternate EC100 Outputs
- C.1 USB or RS-485 Output
  - C.1.1 Specifications
  - C.1.2 Detailed Information
- C.2 Analog Output
  - C.2.1 Specifications
  - C.2.2 Detailed Information
Appendix D. CSAT3A Orientation
- D.1 Determining True North and Sensor Orientation
- D.2 Online Magnetic Declination Calculator
Appendix E. Useful Equations
Appendix F. Safety Data Sheets (SDS)
- F.1 Molecular Sieve, Type 13X
- F.1 Magnesium Perchlorate
- F.2 Decarbite
Appendix G. Packing Information
- G.1 EC150-GH Packing Information
- G.2 EC150-SH Packing Information
Limited Warranty
Assistance
Safety
Campbell Scientific Regional Offices

Campbell Scientific EC150 CO₂ Instruction Manual

Campbell Scientific EC150 CO₂ Analyzer manual cover

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Campbell Scientific EC150 CO₂ Analyzer Specification

The Campbell Scientific EC150 CO₂ Analyzer is a high-precision instrument designed for measuring carbon dioxide and water vapor concentrations in the atmosphere. This analyzer features a robust open-path sensor that facilitates real-time measurements essential for applications such as eddy covariance flux studies, climate research, and meteorological monitoring. The EC150 operates within a CO₂ concentration range of 0 to 2000 ppm and a water vapor concentration range of 0 to 60 mmol/mol, providing high accuracy and stability.

The instrument integrates a non-dispersive infrared (NDIR) gas analyzer that ensures precise detection and quantification of CO₂ and H₂O molecules. Its rapid response time, typically less than 0.1 seconds, makes it ideal for capturing fast-changing atmospheric conditions. The EC150 is equipped with a temperature-controlled optical path that minimizes drift and ensures consistent performance across varying environmental conditions.

Connectivity is facilitated through digital interfaces, allowing seamless integration with data loggers and other instruments for synchronized data collection. The analyzer is designed for low power consumption, making it suitable for deployment in remote locations. Its lightweight and compact construction ensure ease of installation and reduced aerodynamic interference, which is crucial for accurate flux measurements.

The EC150 is engineered to withstand harsh environmental conditions, featuring a weatherproof design that protects sensitive components from dust and moisture. Additionally, the unit requires minimal maintenance due to its self-cleaning optics and automatic zero and span adjustments. Overall, the Campbell Scientific EC150 CO₂ Analyzer is a reliable and efficient tool for researchers and professionals seeking precise atmospheric gas measurements.

Campbell Scientific EC150 CO₂ Analyzer F.A.Q.

How do I calibrate the Campbell Scientific EC150 CO₂ Analyzer?

To calibrate the EC150, follow the manufacturer's calibration procedure using standard calibration gases. Ensure zero and span gases are used to set the appropriate baselines. Regular calibration is recommended to maintain measurement accuracy.

What should I do if the EC150 shows erratic CO₂ readings?

Check the analyzer for any blockages or leaks in the sampling line. Ensure that the unit is securely mounted and that environmental conditions such as temperature fluctuations are minimized. Perform a system restart if necessary.

How can I clean the optical windows of the EC150?

To clean the optical windows, gently use a soft, lint-free cloth dampened with a mild cleaning solution. Avoid scratching the windows and ensure no residue is left behind. Regular cleaning helps maintain data accuracy.

What is the recommended maintenance schedule for the EC150?

Inspect and clean the sensor and sampling components monthly. Calibrate the analyzer every 6 months or as needed based on environmental conditions and usage. Check for firmware updates periodically.

How do I troubleshoot a communication error with the EC150?

Verify all data cables and connections are secure. Check the configuration settings in your data logger or computer. Ensure the correct communication protocol is selected and try restarting connected devices.

Can the EC150 be used in high humidity environments?

Yes, the EC150 can be used in high humidity environments, but it is important to ensure that the sensor's protective housing is intact and that periodic maintenance checks are followed to prevent moisture accumulation.

What should I do if the EC150 is not powering on?

Check the power supply connections and ensure that the power source is operational. Inspect the power cable for any damage and replace if necessary. Verify that the power button or switch is functioning correctly.

How can I update the firmware on the EC150?

Access the Campbell Scientific website to download the latest firmware. Follow the installation instructions provided in the firmware update guide, using the appropriate interface to connect the EC150 to your computer.

What data output options are available with the EC150?

The EC150 offers several data output options including SDM, RS-232, and analog outputs. These options allow integration with various data acquisition systems and ensure flexibility in data handling.

Is it possible to integrate the EC150 with other environmental sensors?

Yes, the EC150 can be integrated with other environmental sensors by connecting it to a compatible data logger capable of handling multiple inputs. This integration allows for comprehensive environmental monitoring.