Repasa el jack de conexión en la caja de la ISS.
Creo que en la página de Davisnet se hablaba de limpiarlos y ocasionalmente recalibrarlos en fábrica.
http://www.davisnet.com/product_documents/weather/manuals/Solar_UV_Rad_Sensor.pdfMaintaining the Sensor
For the most accurate readings, clean the diffuser after mounting, and then periodically.
Use ethyl alcohol (not rubbing alcohol).
Due to the sensitivity of ultraviolet and solar radiation sensors, it is common practice for manufacturers to recommend recalibration after a period of time. Here at Davis Instruments, we have seen approximately 2% drift per year on the readings from these sensors. For applications demanding higher accuracy, the sensors should be calibrated once every year.
Sensor Troubleshooting
If encountering sensor problems, carefully check all cable connections from the sensor to the console. Cable connections account for a large portion of the potential problems.
Connections should be firmly seated in the jacks and plugged in straight. Try jiggling the cable while looking at the display. If a reading appears intermittently on the display as you jiggle the cable, the connection is faulty.
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