Common Failures and Repair Methods of Solar Radiation Pyranometer

Abstract: This article will focus on common failures of solar radiation sensors (Pyranometer) and provide some repair methods. Understanding these common failures and the corresponding solutions can help users better identify and solve Pyranometer problems to ensure its proper operation and accurate measurement of solar radiation energy.

1. Trouble: Drift phenomenon

   Problem Description: The signal output from the Pyranometer has drifted over time, resulting in inaccurate measurements.

   Solution:

   - Periodic Calibration: Fix the drift problem by performing periodic calibration according to the manufacturer's recommendations.

   - Clean Sensor Surface: Gently clean the sensor surface with a non-alkaline cleaner to ensure it is in good working condition.

2. Fault: Erratic output signal

   Problem Description: The output signal of the Pyranometer is unstable and fluctuates widely.

   Solution:

   - Check cable connections: Check that all cable connections are firm and reliable to ensure stable signal transmission.

   - Check supply voltage: Ensure that the supply voltage is stable to avoid voltage fluctuations affecting the output signal.

   - Check the atmospheric humidity: High humidity environment may lead to unstable output signals, which should be avoided as much as possible.

3. Trouble: Decreased sensitivity

   Problem description: The sensitivity of the Pyranometer has dropped and it is unable to accurately measure solar radiation.

   Solution:

   - Check the sensor surface: Accumulation of dust, dirt or grease on the sensor surface may result in a loss of sensitivity, the surface should be cleaned promptly.

   - Calibrate the sensor: Perform a calibration according to the manufacturer's guidelines to restore the sensor to normal operating condition.

4. Fault: Physical Damage

   Problem description: The Pyranometer may be damaged by improper operation or external physical damage.

   Solution:

   - Perform Repair or Replacement: If physical damage is found to the Pyranometer, stop using it immediately and send it to a service professional for repair or replacement.

5. Fault: Zero Drift

   Problem description: The zero point of the Pyranometer has drifted, resulting in biased measurement results.

   Solution:

   - Calibrate regularly: Calibrate regularly to fix the zero drift problem and ensure the accuracy of the measurement results.

   - Check for Temperature Changes: Temperature changes may cause the zero point to drift and calibration should be adjusted accordingly based on the temperature characteristics of the sensor.

Summary:

Common failures of solar radiation sensors(Pyranometer)  include drift phenomena, unstable output signals, loss of sensitivity, physical damage and zero drift. In order to repair them, users can take appropriate solutions such as regular calibration, cleaning the sensor surface, checking cable connections and supply voltage, and timely repairing or replacing damaged devices. With correct maintenance and timely repair, the Pyranometer is able to maintain proper operation and ensure accurate measurement of the sun's radiant energy function.

Pyranometer Solar Radiation Sensors data sheet

NBL-W-HPRS-Solar-Radiation-Sensor-Instruction-Manual-V3.0.pdf

NBL-W-SRS-Solar-radiation-sensor-instruction-manual-V4.0.pdf