The radiometer is carefully leveled to provide accurate downwelling UV irradiance. This is done to minimize shading and reflections from the other instruments. Minimum, maximum and standard deviation values are also reported for each minute. The instrument is operated in a level position. C. A Peltier element is used to heat or cool the sensor to the nominal temperature.
Solar light enters the detector through the quartz dome and input filter.
The partially filtered light, containing the full UV spectrum, excites the phosphor. Instrument Mentor Quality Control Checks Data are routinely compared with total solar for qualitative similarity. This information is currently unavailable Value Added Procedures None anticipated. Quality Measurement Experiments None anticipated. Calibration and Maintenance Calibration Theory Instrument calibration should be performed by the manufacturer on a yearly cycle.