DAVIS Vantage Pro2 Installation Instructions Addendum

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.
support@davisnet.com 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 Shield
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

DAVIS Vantage Pro2 Specifications

General

Update Interval	2.5 seconds
Temperature Accuracy	±1°F (±0.5°C)
Barometric Pressure Range	16.00 to 32.50 inHg (540 to 1100 hPa)
Rain Collector Type	Tipping bucket
Wind Speed Range	0 to 200 mph (0 to 322 km/h)
Wind Speed Accuracy	±2 mph (±3 km/h) or ±5%, whichever is greater
Wind Direction Resolution	1°
Wind Direction Accuracy	±3°
Solar Radiation Range	0 to 1800 W/m²
Solar Radiation Sensor Accuracy	±5%
UV Index Range	0 to 16
UV Index Accuracy	±5%
Wireless Transmission Range	Up to 1000 ft (300 m)
Temperature Range	-40°F to +150°F (-40°C to +65°C)
Humidity Range	0 to 100%
Humidity Accuracy	±3%
Rain Collector Resolution	0.01 in (0.2 mm)
Rain Measurement Accuracy	±4%
Wind Direction Range	0 to 360°
Power Supply	Solar powered with battery backup