Maintenance And Troubleshooting - DAVIS 6322C User Manual

Maintenance and Troubleshooting

General Maintenance
You should keep the surfaces of the ISS clean, since the radiation shield and solar
panels are less effective when dirty. Remove dust from the solar panel and radiation
shield with a damp cloth.
Several times a year, inspect the rain collector and radiation shield and remove any
debris (such as twigs, leaves, webs and nests) obstructing water flow through the
rain collector or air flow through the radiation shield.
At least once a year, or more often in very dusty installations, dismantle and
thoroughly clean the radiation shield as described in the following pages.
Note: Do not spray the ISS with insecticides of any kind. Some insecticides can damage the
sensors and even damage the radiation shield.
Maintaining UV and Solar Radiation Sensors
The UV and solar radiation sensors have an outer shell or shield, which protects the
sensor body from thermal radiation and provides a path for convection cooling of the
body, minimizing heating of the sensor interior. It houses the precision-shaped
diffuser, exposed through the top of the shield.
Try not to 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 with a soft cloth.
Due to the sensitivity of ultraviolet and solar radiation sensors it is common practice
for manufacturers to recommend re-calibration after a period of time. Users
demanding high accuracy typically recalibrate their sensors annually. Here at Davis
Instruments, we have seen less than 2% drift per year on the readings from these
sensors.
Contact Technical Support about returning your sensor for calibration. See
"Contacting Technical Support" on page 43.
Maintaining the Anemometer
The free movement of the wind vane and cups can be inhibited by dust, debris,
insects, and spider webs. With an Allen wrench, remove the cups and vane. Remove
any dust or debris from the shafts and housing. Turn the shafts the cups and vane
rotate on.While the wind direction shaft should have more resistance than the wind
cup shaft, if either feels gritty or stiff, contact Davis Technical Support. Reattach the
cups and van and tighten with the Allen wrench.
Note: Do not lubricate the shaft or bearings in any way. When replacing the cups, make sure
they are not rubbing against any part of the anemometer head.
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