Campbell Scientific SR20-D2 Product Manual

Campbell Scientific SR20-D2 Sensor manual cover

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Campbell Scientific SR20-D2 Sensor Specification

The Campbell Scientific SR20-D2 Sensor is a high-precision pyranometer designed to measure solar irradiance with exceptional accuracy. It is specifically engineered to meet the requirements of meteorological networks, solar energy research, and climatological studies. The sensor is classified as a secondary standard pyranometer, adhering to the ISO 9060:2018 standard, ensuring reliable performance in various environmental conditions.

The SR20-D2 features a dual-dome construction that minimizes thermal offsets and enhances measurement stability. It employs a state-of-the-art thermopile sensor with a black coating, which ensures a broad spectral sensitivity range from 285 to 3000 nanometers. This broad range enables the sensor to accurately capture the total solar spectrum, providing comprehensive data for solar radiation analysis.

The sensor is equipped with a digital output interface, supporting both Modbus RTU and SDI-12 communication protocols, which facilitates seamless integration into data acquisition systems. The SR20-D2 also includes a built-in temperature sensor that provides compensation for temperature variations, ensuring consistent measurement accuracy across a wide operating temperature range from -40°C to 80°C.

With an integrated desiccant cartridge, the SR20-D2 maintains optimal internal humidity levels, which extends the sensor's operational lifespan. Its robust housing is designed to withstand harsh environmental conditions, featuring an IP67 rating that offers protection against dust and water ingress. The sensor's compact and durable design makes it suitable for long-term outdoor installations.

Overall, the Campbell Scientific SR20-D2 Sensor is a reliable and high-performance instrument for accurately measuring solar irradiance, making it an ideal choice for researchers and professionals in the field of solar energy and meteorology.

Campbell Scientific SR20-D2 Sensor F.A.Q.

What are the primary applications of the Campbell Scientific SR20-D2 Sensor?

The SR20-D2 Sensor is primarily used for measuring solar radiation with high accuracy, suitable for meteorological networks, photovoltaic system performance monitoring, and scientific research applications.

How do I install the SR20-D2 Sensor for optimal performance?

To install the SR20-D2 Sensor, mount it on a stable platform using the recommended leveling fixtures. Ensure that the sensor is free from obstructions and shadows, and align it horizontally using the built-in leveling bubble.

What is the recommended maintenance schedule for the SR20-D2 Sensor?

Regular maintenance for the SR20-D2 Sensor includes cleaning the glass dome and checking the leveling every few months. Inspect for any physical damage and recalibrate the sensor annually to ensure measurement accuracy.

How can I troubleshoot data discrepancies from the SR20-D2 Sensor?

First, verify the sensor's orientation and leveling. Check all electrical connections for corrosion or damage. Compare the sensor's data with a reference sensor to identify any discrepancies. Ensure that the sensor is calibrated correctly.

Can the SR20-D2 Sensor be integrated with Campbell Scientific dataloggers?

Yes, the SR20-D2 Sensor can be easily integrated with Campbell Scientific dataloggers. Utilize the appropriate wiring configuration and set up the datalogger program to record the sensor's output accurately.

What should I do if the SR20-D2 Sensor shows no data output?

Check the power supply and ensure that the sensor is connected correctly. Inspect the cable and connectors for any signs of damage. If issues persist, consult the sensor's manual or contact technical support.

How is the SR20-D2 Sensor calibrated?

The SR20-D2 Sensor is factory-calibrated, but it should be recalibrated annually. This can be done by sending it to an accredited laboratory or utilizing a reference sensor with known accuracy under stable conditions.

Are there specific environmental conditions that could affect the SR20-D2 Sensor's performance?

Extreme weather conditions, such as snow, heavy rain, or dust storms, can affect the sensor's performance. Regular cleaning and maintenance help mitigate these impacts. Ensure that the sensor is installed in an environment that minimizes exposure to such conditions.

What type of output does the SR20-D2 Sensor provide?

The SR20-D2 Sensor provides a digital output that is compatible with most data acquisition systems. It includes both Modbus and SDI-12 communication protocols, allowing flexible integration options.

How can I ensure long-term reliability of the SR20-D2 Sensor?

To ensure long-term reliability, perform regular maintenance, including cleaning and recalibration. Protect the sensor from extreme environmental conditions and handle it carefully during installation and maintenance procedures.