Fan-Aspirated ISS Troubleshooting
7
Note:
Please do not return items to the factory for repair without prior authorization.
Contacting Davis Instruments
(510) 732-7814
for Technical Support, Monday – Friday, 7:00 a.m. – 5:30
p.m. Pacific Time.
E-mail to Technical Support.
(510) 670-0589
Fax to Customer Service or Tech Support.
www.davisnet.com Copies of User Manuals are available on the “Support”
page. Watch for FAQs and other updates. Subscribe to the e-newsletter.
Theory of Operation
The diagram below shows how the Fan-Aspirated Radiation Shield draws
outside air up through the sensor chamber and between the three walls sur-
rounding the sensor chamber.
Cross-section of Fan-Aspirated Radiation Shiel
d
Fan-Aspirated ISS Specifications
Aspiration Rate . . . . . . . . . . . . . . . . . . 190 ft./min. (.96 m/s) (solar-
powered, full sun), 80 feet/min. (0.4
m/s) (battery only)
Radiation-Induced Temperature Error. . 0.5°F (0.3°C)
[At solar noon, insolation = 1040 W/
m2]
MOTOR
FAN
SENSOR
CHAMBER
