Maintenance and Troubleshooting
Maintaining UV and Solar Radiation Sensors
If the ISS is a Plus model and contains UV and solar radiation sensors, do not touch the small white diffusers on top of the sensors. Oil from skin reduces their sensitivity. If you are concerned that you have touched the diffusers at any time, clean the UV diffuser using ethyl alcohol with a soft cloth. When cleaning the UV diffuser, DO NOT use rub- bing or denatured alcohols because they can affect accuracy of the sensor readings. Ethyl alcohol can be procured through an industrial or laboratory supply store. Clean the solar diffuser with a soft damp cloth.
Due to the sensitivity of ultraviolet and solar radiation sensors it is common practice for manufacturers to recommend
Contact Technical Support about returning your sensor for calibration. See “Contacting Davis Instruments” on page 27.
Cleaning the Radiation Shield
The outer plating of the radiation shield should be cleaned when there is excessive dirt and
Note: | Spraying down or using water excessively to clean the radiation shield can damage the sensitive |
| sensors or alter the data and readings the ISS is transmitting. |
Check the radiation shield for debris or insect nests at least once a year and clean when necessary. A buildup of material inside the shield reduces its effectiveness and may cause inaccurate temperature and humidity readings.
4" Screw 
(3)
Lock
Washer
Flat
Washer 
To thoroughly clean the radiation shield: 1. Remove the rain collector cone.
2. Using a Phillips head screwdriver, loosen the three 4'' (~100mm) screws holding the
radiation shield plates together.
3. Taking care to maintain the order in which
the five plates are assembled, separate the Plates plates as shown and remove all debris from inside the shield.
Rain Collector Base
Temp/Humidity Sensor Plate
25
