Campbell Scientific LI190R Instruction Manual

Campbell Scientific LI190R Sensor manual cover
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Campbell Scientific LI190R Sensor Specification

The Campbell Scientific LI190R Sensor is a precision instrument designed to measure photosynthetically active radiation (PAR) in environments where accurate assessment of light is critical. This sensor is particularly valuable for applications in agricultural research, meteorology, and environmental monitoring. The LI190R employs a silicon photodiode and interference filter to ensure accurate detection of light within the 400 to 700 nm wavelength range, which corresponds to the spectrum used by plants for photosynthesis.

The sensor's design incorporates a durable, weather-resistant housing that protects its sensitive components from harsh environmental conditions, ensuring reliable performance in outdoor settings. The LI190R is characterized by its high sensitivity and fast response time, which enable it to provide precise measurements even under changing light conditions. Its cosine-corrected head ensures accurate readings at various sun angles, making it suitable for both direct and diffuse light measurements.

The sensor outputs an analog signal that is proportional to the incident PAR, allowing for easy integration with data loggers and other recording devices. It operates over a wide temperature range, ensuring consistent performance in diverse climatic conditions. The LI190R's compact form factor and robust build make it an ideal choice for both stationary and portable applications.

Installation and maintenance are straightforward, with minimal calibration required thanks to its stable long-term performance. The LI190R is an essential tool for researchers and professionals seeking to optimize plant growth conditions, study ecological impacts, or monitor climate variables. By delivering reliable and precise PAR measurements, the LI190R supports advanced analysis of light-dependent biological processes.

Campbell Scientific LI190R Sensor F.A.Q.

How do I install the Campbell Scientific LI190R Sensor properly?

To install the LI190R Sensor, mount it at the desired location using a leveling base and ensure it is level. Connect it to a compatible data logger using the supplied cable, taking care to protect the connections from moisture.

What are the steps for calibrating the LI190R Sensor?

The LI190R Sensor is factory calibrated, but for field calibration, use a reference sensor with known calibration. Compare readings under consistent conditions, and apply a correction factor if necessary.

How can I troubleshoot if the LI190R Sensor is not providing data?

Check the connections to ensure they are secure and not corroded. Verify that the data logger is configured correctly and that the power supply is adequate. If issues persist, consult the user manual for further diagnostics.

What maintenance is required for the LI190R Sensor?

Regularly clean the sensor's optical surfaces with a soft, damp cloth to remove dust and debris. Periodically check the connections for corrosion or wear, and recalibrate the sensor annually or as needed.

How do I interpret the data from the LI190R Sensor?

The LI190R Sensor measures photosynthetically active radiation (PAR) in micromoles per square meter per second (µmol m^-2 s^-1). Data can be used to assess light conditions for plant growth or other ecological studies.

Can the LI190R Sensor be used underwater?

No, the LI190R Sensor is not designed for underwater use. It should be used in open-air environments only, where it can accurately measure solar radiation.

What is the optimal positioning for the LI190R Sensor?

Position the LI190R Sensor with a clear view of the sky, avoiding obstructions like trees or buildings that may cast shadows. It should be placed horizontally and leveled for accurate measurements.

What should I do if the sensor gives inconsistent readings?

Ensure that the sensor is clean and level. Check for any nearby objects that might intermittently block the sensor and verify the calibration against a known reference.

How can I protect the LI190R Sensor from extreme weather conditions?

While the LI190R Sensor is built to withstand harsh conditions, it can be protected further with weather shields or enclosures. Ensure the protection does not obstruct the sensor's field of view.

Is it possible to extend the cable length of the LI190R Sensor?

Yes, cable length can be extended using compatible extension cables, but keep in mind that excessive lengths may affect signal integrity. Use high-quality cables to minimize losses.