36
Maintaining a 24-Hour Fan-Aspirated Radiation Shield
The cross-section diagram shows how the 24-
Hour Fan-Aspirated Radiation Shield draws
outside air up through the sensor chamber and
between the three walls surrounding the sensor
chamber, while the shield stack prevents
radiation heating of the outer wall.
To clean it, disassemble the shield and clean
interior surfaces as necessary to prevent dirt
build up. Check to make sure the fan is running
by listening for it, or by holding a piece of
tissue paper under the shield. See “24-Hour and
Day Time Fans: Replacing the Fan Motor and Batteries” on page 41.
To thoroughly clean the 24-Hour Fan-Aspirated Radiation shield:
Tools and supplies needed:
•
Medium Phillips head screwdriver (and a small Phillips head screwdriver if you are
also replacing the batteries)
•
Adjustable wrench
•
Soft, damp cloth
•
Soft brush (such as a toothbrush)
You will not need to remove the rain collector base from the pole or post on which it
is mounted. You will be able to remove the entire radiation shield so that you can
clean it and access the temperature/humidity sensor, the fan, and the fan batteries.
1. Open the transmitter shelter, remove the foam insert and unplug the temperature-
humidity cable from the sensor interface. Pull the cable down through the access
hole and out of the shelter.
Tip:
You can also remove the transmitter shelter door by unplugging the solar panel
cable. Then you can use the transmitter shelter door to store screws, washers, and
spacers as you remove them.
MOTOR
FAN
SENSOR
CHAMBER
Summary of Contents for 6322C
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