Device for measuring solar radiation, has sensor that is arranged between measuring intervals, and is made into guard state in which light entry region of solar radiation detector before contamination is protected

摘要

The device has a first solar radiation detector (3) having an entry region for solar radiation. The measurement result of the solar radiation detector is evaluated in intervals. The sensor arranged between the measuring intervals is made into a guard state by an electronic controller, where the light entry region of the solar radiation detector before contamination is protected in the guard state. The solar radiation detector is cleaned by an impulse mass flow by contaminations, when the solar radiation detector is in the guard state.