Contents

Revision and Copyright Information
Limited Warranty
Assistance
Safety
Table of Contents
1. General
2. Specifications
- 2.1 Measurements
- 2.2 Output Signals
- 2.3 Physical Description
- 2.4 Power Requirements
3. Initial Setup
- 3.1 Factory Settings
- 3.2 SDM Address
4. Installation
- 4.1 Orientation
- 4.2 Mounting
- 4.3 Leveling
- 4.4 Fine Wire Thermocouple
5. Wiring
6. CSAT3 Outputs
- 6.1 SDM Output
  - 6.1.1 CRBasic Dataloggers
  - 6.1.2 EDLOG Dataloggers
  - 6.1.3 CR9000
- 6.2 RS-232 Output
- 6.3 Analog Output
7. Operational Principles
- 7.1 Embedded Code Version 4
- 7.2 Embedded Code Version 3
- 7.3 Effects of Crosswind on the Speed of Sound
8. CSAT3 Trigger
- 8.1 Sampling Modes
  - 8.1.1 Single-Measurement Mode
  - 8.1.2 Oversample Mode
9. Data Pipeline Delay
10. Datalogger Programming using SDM
- 10.1 CRBasic CSAT3 () Instruction
- 10.2 EDLOG SDM-CSAT3 (P107) Instruction
- 10.3 Datalogger Instruction Parameters
- 10.4 Diagnostic Word
- 10.5 SDMTrigger ()/SDM-Group Trigger (P110)
- 10.6 Example CRBasic Datalogger Program
- 10.7 Example EDLOG Datalogger Program
11. Maintenance
- 11.1 Wicks
- 11.2 Calibration
  - 11.2.1 Cold Shifted Calibration
  - 11.2.2 Test for Wind Offset
12. Select Backdoor Commands
Appendix A. CSAT3 Orientation
- A.1 Determining True North and Sensor Orientation
- A.2 Online Magnetic Declination Calculator
Appendix B. Serial Communications with the CSAT3
- B.1 CSAT3 RS-232 Commands
- B.2 CSAT3 Binary Data Output Format
- B.3 Words 0 through 3
- B.4 Word 4
- B.5 CSAT3 RS-232 Status Format
Appendix C. CSAT3 Measurement Theory
- C.1 Theory of Operation
  - C.1.1 Wind Speed
  - C.1.2 Temperature
Appendix D. SDM Communications and Long Signal Cables
- D.1 Brief Description of SDM Clock Rates
- D.2 CR3000 Example
- D.3 CR23X Example
Campbell Scientific Companies

Campbell Scientific CSAT3 3D Instruction Manual

Campbell Scientific CSAT3 3D Anemometer manual cover

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Campbell Scientific CSAT3 3D Anemometer Specification

The Campbell Scientific CSAT3 3D Anemometer is a high-performance instrument designed for precise wind measurement in meteorological and environmental research applications. It features a three-dimensional sonic anemometer that provides accurate and reliable data on wind speed and direction, capturing fluctuations in turbulent airflows. The CSAT3 operates with a measurement frequency of up to 20 Hz, enabling it to record rapid changes in wind dynamics essential for turbulence studies. The sensor design includes three orthogonal pairs of transducers, which create a robust framework for measuring wind components in three dimensions, ensuring minimal flow distortion and high precision.

The anemometer is constructed with durable materials allowing it to withstand harsh environmental conditions, making it suitable for long-term outdoor deployments. It is equipped with a temperature sensor that facilitates sonic temperature measurements, which is vital for calculating virtual temperature and density corrections in atmospheric studies. The CSAT3 interfaces seamlessly with data loggers and offers flexible communication options, including RS-232 and SDM, ensuring compatibility with various data acquisition systems. Its low power consumption makes it ideal for remote and solar-powered installations.

Calibration of the CSAT3 is straightforward, typically requiring minimal maintenance and adjustments, which enhances its operational efficiency. The anemometer's compact design facilitates easy integration into existing measurement setups, and its lightweight construction simplifies transportation and installation. The CSAT3 is widely used in applications such as boundary layer research, eddy covariance flux measurements, and wind energy assessments, where high-resolution wind data is critical. Overall, the CSAT3 3D Anemometer is a reliable and precise tool that meets the demanding requirements of modern atmospheric research.

Campbell Scientific CSAT3 3D Anemometer F.A.Q.

What is the recommended procedure for cleaning the CSAT3 anemometer?

To clean the CSAT3, gently wipe the sensor arms and transducers with a soft, damp cloth. Avoid using harsh chemicals or abrasive materials to prevent damage.

How can I verify the calibration status of my CSAT3 anemometer?

Check the calibration certificate provided with the device. For accurate measurements, recalibration is recommended every two years.

What should I do if the CSAT3 anemometer is not responding to data logger commands?

Ensure all connections are secure and the data logger is powered. Check for any error messages and refer to the troubleshooting section of the manual.

How can I integrate the CSAT3 with a Campbell Scientific data logger?

Use the CSAT3-L cable to connect the anemometer to the data logger. Configure the data logger using LoggerNet software for seamless integration.

What is the proper way to mount the CSAT3 anemometer for optimal performance?

Mount the CSAT3 on a stable mast with the sensor arms parallel to the ground. Ensure it is clear of obstructions that might affect airflow measurements.

How do I perform a diagnostic test on the CSAT3 anemometer?

Use the CSAT3 TestSet software to perform diagnostics. Follow the on-screen instructions to check sensor functionality and data output.

What environmental conditions are suitable for CSAT3 operation?

The CSAT3 is designed to operate in a wide range of conditions, from -30°C to 50°C. Avoid placing it in areas with excessive dust or moisture.

How can I update the firmware of my CSAT3 anemometer?

Download the latest firmware from the Campbell Scientific website. Connect the anemometer to a computer and use the Device Configuration Utility to update the firmware.