Contents

Revision and Copyright Information
Limited Warranty
Assistance
Safety
Table of Contents
1. Introduction
2. Precautions
3. Initial Inspection
4. Overview
- 4.1 System Components
  - 4.1.1 Standard Components
  - 4.1.2 Optional Components
  - 4.1.3 Common Accessories
  - 4.1.4 Other Accessories
  - 4.1.5 Support Software
  - 4.1.6 Replacement Parts
- 4.2 Theory of Operation
  - 4.2.1 Intake Assemblies
  - 4.2.2 Valve Manifold
  - 4.2.3 Pump Module
- 4.3 Specifications
  - 4.3.1 CO2/H2O Analyzer
  - 4.3.2 System Enclosure
  - 4.3.3 Intake Assembly
5. Installation
- 5.1 Mounting
  - 5.1.1 Support Structure
  - 5.1.2 AP200 Enclosure
  - 5.1.3 Intake Assemblies
- 5.2 Plumbing
  - 5.2.1 Profile Sample Tubes
  - 5.2.2 Zero and CO2 Span
  - 5.2.3 H2O Span
- 5.3 Wiring
  - 5.3.1 Ground Connection
  - 5.3.2 Intake Heater Cables
  - 5.3.3 Power
- 5.4 Configure the Program
  - 5.4.1 System Configuration Variables
  - 5.4.2 Compile Switches
- 5.5 Starting and Stopping the Sequence
- 5.6 Verify Performance
  - 5.6.1 Quick Status Check Using a Keyboard Display
  - 5.6.2 Checking Status Remotely
  - 5.6.3 On-site System Checks
6. Infrared Gas Analyzer (IRGA) Zero and Span
- 6.1 Automatic Zero and Span
- 6.2 Manual Zero and Span
  - 6.2.1 Check Zero and CO2 Span
  - 6.2.2 Do CO2 and H2O Zero
  - 6.2.3 Do CO2 Span
  - 6.2.4 Do H2O Span
  - 6.2.5 Restart the Sequence
  - 6.2.6 Check the System
7. Maintenance and Troubleshooting
- 7.1 Plumbing Leaks
- 7.2 Enclosure Desiccant
- 7.3 Intake Filters
- 7.4 LI-850 (IRGA)
  - 7.4.1 Installing and Removing the IRGA
  - 7.4.2 Configuring the IRGA
- 7.5 Zero/Span Flow
8. Repair
Appendix A. Keyboard Display Menu
Appendix B. AP200 Diagnostics
Appendix C. Public Variables
Appendix D. Output Tables
Appendix E. Temperature Profile
Appendix F. Valve Sequence Timing
Appendix G. AC/DC Adapter Kit
Appendix H. Swagelok Fittings
- H.1 Assembly
- H.2 Common Replacement Parts
Appendix I. Useful Equations
Appendix J. AP200 Pump Replacement
- J.1 Introduction
- J.2 Removal
- J.3 Installation
Campbell Scientific Companies

Campbell Scientific A200 CO2/H2O Instruction Manual

Campbell Scientific A200 CO2/H2O System manual cover

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Campbell Scientific A200 CO2/H2O System Specification

The Campbell Scientific A200 CO2/H2O System is designed for precise and reliable measurement of carbon dioxide and water vapor concentrations in various environmental conditions. This system integrates state-of-the-art non-dispersive infrared (NDIR) gas analyzer technology, ensuring high accuracy and stability in readings. It is equipped with advanced temperature and pressure compensation algorithms to minimize the influence of environmental changes on measurement accuracy. The A200 system features a robust construction that facilitates its use in challenging outdoor environments, while its compact design allows for easy installation and maintenance.

The system supports a wide range of CO2 and H2O concentration levels, making it suitable for diverse applications such as ecosystem flux studies, agricultural monitoring, and climate research. The A200's sampling system includes a high-performance pump and a well-engineered air intake path, which together ensure efficient gas exchange and rapid response times. The device operates efficiently over a broad temperature range, with capabilities to function in both extreme cold and hot environments.

Data communication is streamlined through multiple interface options, including RS-232 and Ethernet, which facilitate easy integration into existing data acquisition systems. The system is powered by a low-energy consumption design, making it ideal for remote field deployments where power resources may be limited. The A200 is compatible with various Campbell Scientific data loggers, enhancing its flexibility and utility in complex monitoring networks. Overall, the Campbell Scientific A200 CO2/H2O System stands out for its precision, durability, and adaptability, making it an essential tool for researchers and professionals in environmental monitoring and analysis.

Campbell Scientific A200 CO2/H2O System F.A.Q.

How do I properly set up the Campbell Scientific A200 CO2/H2O system for the first time?

To set up the Campbell Scientific A200 CO2/H2O system, ensure that all components are connected according to the user manual. Install the sensors at the recommended height above ground level in an area free from obstructions. Power the system using the appropriate voltage and check all connections for secure attachment.

What are the common troubleshooting steps for a non-responsive A200 system?

If the A200 system is non-responsive, check the power supply and cable connections first. Verify that the firmware is up to date. If the system still does not respond, perform a soft reset by cycling the power. Consult the user manual for specific error codes and their resolutions.

How can I ensure accurate CO2 measurements with the A200 system?

Regular calibration is crucial for maintaining accurate CO2 measurements. Use standard calibration gases and follow the calibration procedures outlined in the user manual. Additionally, periodically clean the sensors and inspect the system for any damage or wear.

What maintenance is required for the A200 system?

Routine maintenance for the A200 system includes cleaning the optical path and sensors, checking and replacing filters, and inspecting cables and connections for wear. Regularly update the firmware and software to the latest versions to ensure optimal performance.

How do I perform a firmware update on the A200 system?

To update the firmware, connect the A200 system to a computer via USB or serial connection. Download the latest firmware from the Campbell Scientific website and use the provided software tool to upload the firmware to the system. Follow on-screen instructions carefully during the update process.

Can the A200 system operate in extreme weather conditions?

The A200 system is designed to operate in a range of environmental conditions, but extreme weather can impact its performance. Ensure that the system is housed in a protective enclosure and regularly inspect it for any damage caused by weather conditions such as heavy rain, snow, or high winds.

How do I interpret data from the A200 system?

Data from the A200 system is typically recorded in a Campbell Scientific data logger. Use Campbell Scientific software tools to download and analyze the data. The data is often presented in time-series format, allowing for detailed analysis of trends and patterns in CO2 and H2O levels.

What should I do if the A200 system shows inconsistent CO2 readings?

Inconsistent CO2 readings can result from sensor contamination, miscalibration, or environmental factors. Begin by recalibrating the sensors and ensuring they are clean. Check for leaks in the sampling system and ensure that the environmental conditions are stable during measurements.

How do I clean the optical path of the A200 system?

To clean the optical path, power down the system and carefully remove the optical components as described in the user manual. Use a soft, lint-free cloth and isopropyl alcohol to gently clean the optical surfaces. Avoid scratching or applying too much pressure. Reassemble the components and power on the system.

What data logging options are available with the A200 system?

The A200 system can be paired with various Campbell Scientific data loggers, which offer flexible data logging options. These data loggers can store data locally or transmit it remotely via communication options such as cellular, Wi-Fi, or satellite. Choose a data logger that meets the specific requirements of your monitoring application.