Contents

Revision and Copyright Information
Limited Warranty
Assistance
Precautions
Table of Contents
1. Introduction
2. Cautionary Statements
3. Initial Inspection
- 3.1 Ships With
4. Quickstart
5. Overview
6. Specifications
7. Installation
- 7.1 Mount to a Tripod or Tower
  - 7.1.1 Tools Required
  - 7.1.2 Mounting Procedure
    - 7.1.2.1 CM225 Solar Sensor Mounting Stand
    - 7.1.2.2 015ARM
- 7.2 Wiring
- 7.3 Programming
  - 7.3.1 Input Range
  - 7.3.2 Multiplier
- 7.4 Output Format Considerations
8. Maintenance and Calibration
9. Troubleshooting
10. Acknowledgements
Appendix A. Importing Short Cut Code Into a Program Editor
Appendix B. Example Program
- B.1 Example CR1000 Program
Campbell Scientific Companies

Campbell Scientific LI190SB Instruction Manual

Campbell Scientific LI190SB Sensor manual cover

Pages 30

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Campbell Scientific LI190SB Sensor Specification

The Campbell Scientific LI190SB Sensor is a high-precision, silicon photodiode-based quantum sensor designed to measure photosynthetically active radiation (PAR) in the wavelength range of 400 to 700 nanometers. This sensor is commonly used in agricultural and ecological research to assess light conditions for plant growth. It features a cosine-corrected head that ensures accurate measurements of solar radiation regardless of the sun's angle. The LI190SB is designed for durability and long-term field deployment, with robust construction that withstands various environmental conditions. It has a spectral response that closely matches the PAR wavelength range, providing reliable data for photosynthesis-related studies.

The sensor operates with a standard output of 0 to 1 millivolt per micromole per square meter per second, allowing easy integration with Campbell Scientific dataloggers and systems. The calibration process is traceable to the National Institute of Standards and Technology (NIST), ensuring precision and reliability in the data collected. The LI190SB is equipped with a 3-meter cable as standard, with optional cable lengths available for customized installations. Installation is straightforward, with the sensor typically mounted on a mast or boom to minimize obstructions and ensure optimal exposure to sunlight.

Overall, the Campbell Scientific LI190SB Sensor is an essential tool for researchers and professionals who require accurate PAR measurements to facilitate studies in photosynthesis, plant growth, and climatology. Its reliable performance and compatibility with various data acquisition systems make it a versatile choice for both field and laboratory settings.

Campbell Scientific LI190SB Sensor F.A.Q.

How do I install the LI190SB sensor for optimal performance?

To install the LI190SB sensor, mount it on a stable platform away from obstructions, ensuring it is level and facing the correct orientation for accurate light measurement. Use a spirit level and the mounting bracket provided.

What is the recommended maintenance routine for the LI190SB sensor?

Regularly clean the sensor's dome with a soft, lint-free cloth and mild detergent to remove any dust or debris. Inspect the sensor for damage and ensure all cables are securely connected. Check the sensor's leveling and recalibrate if necessary.

How can I troubleshoot if the LI190SB sensor is not providing readings?

First, check all cable connections and ensure the sensor is correctly wired to the data logger. Verify that the data logger is powered and configured to read the sensor. Inspect the sensor for any physical damage. If problems persist, consult the user manual.

What environmental conditions can affect the LI190SB sensor's performance?

The LI190SB sensor is sensitive to temperature extremes, dust accumulation, and physical obstructions. Ensure it is installed in a location that minimizes these factors, and conduct regular maintenance to maintain accuracy.

How do I calibrate the LI190SB sensor?

The LI190SB sensor is factory calibrated, but periodic calibration is recommended for precision. Use a reference light source and follow the calibration procedure outlined in the user manual, adjusting the sensor's output accordingly.

Can the LI190SB sensor be used in cloudy or low-light conditions?

Yes, the LI190SB sensor is designed to provide accurate measurements across a range of light conditions, including cloudy or low-light environments. However, ensure there are no obstructions blocking the sensor.

What is the expected lifespan of the LI190SB sensor under normal usage?

Under normal usage and with regular maintenance, the LI190SB sensor can have a lifespan of several years. Regular inspections and cleaning will help extend its operational life.

How do I integrate the LI190SB sensor with a Campbell Scientific data logger?

Connect the sensor to the data logger using the appropriate differential or single-ended channel. Configure the data logger settings to match the sensor's output specifications, and verify the connection by checking for live data output.

What should I do if the LI190SB sensor readings are inconsistent?

Check the physical alignment and leveling of the sensor. Ensure that there are no intermittent cable connections. Clean the sensor's dome and check for any obstructions. If inconsistency persists, recalibrate the sensor.

How does temperature affect the accuracy of the LI190SB sensor?

Temperature variations can impact sensor accuracy. The LI190SB is designed to compensate for temperature effects, but extreme temperatures might still cause discrepancies. Ensure the sensor is within its specified operating temperature range.