Product Numbers: 6450 and 6490
Document Part Number: 07395.292
UV and Solar Radiation Sensor Installation Manual
Rev. C (April 6, 2006)
Vantage Pro
®
and Vantage Pro2
™
are trademarks of Davis Instruments Corp., Hayward, CA.
© Davis Instruments Corp. 2006. All rights reserved.
Information in this document subject to change without notice.
This product complies with the essential protection requirements of the EC EMC Directive 89/336/EC.
Copyright © 2005 Davis Instruments Corp. All rights reserved.
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On Vantage Pro stations with a squared radiation shield, ensure that the cables run to
the SIM Box following the same path through the radiation housing as the rest of the
sensor cables. Consult your ISS Manual for instructions on how to do this.
On later Vantage Pro stations and Fan-Aspirated Vantage Pro stations, ensure that the
sensor cables run down through the holes near the base of the sensor mounting shelf
and through the grommet in the SIM Box that the other sensor cables run through.
On Vantage Pro2 stations, first run the cables down from the Sensor Mounting Self and
down through the holes near the base of the Sensor Mounting Shelf. Next, run the
cables through the space between the Rain Collector and the Radiation Shield, follow-
ing the other sensor cables to the access port at the back of the SIM Box. Open the Sim
Box, remove the Foam Insert, and guide the cable through the access port. Insert the
cable jack into the proper receptacle and replace the Foam Insert, ensuring that the
Foam Insert fills all large voids in the access port.
Maintaining the Sensor
For the most accurate readings, clean the diffuser after mounting, and then periodically.
Use ethyl alcohol (not rubbing alcohol).
Due to the sensitivity of ultraviolet and solar radiation sensors, it is common practice
for manufacturers to recommend recalibration after a period of time. Here at Davis
Instruments, we have seen approximately 2% drift per year on the readings from these
sensors. For applications demanding higher accuracy, the sensors should be calibrated
once every year.
Sensor Troubleshooting
If encountering sensor problems, carefully check all cable connections from the sensor
to the console. Cable connections account for a large portion of the potential problems.
Connections should be firmly seated in the jacks and plugged in straight. Try jiggling
the cable while looking at the display. If a reading appears intermittently on the display
as you jiggle the cable, the connection is faulty.
Contacting Davis Technical Support
If you have any questions about the sensors or encounter problems installing the sen-
sors, please contact Davis Technical support:
(510) 732-7814—Monday Through Friday, 7:00 a.m. to 5.30 p.m., Pacific Time.
(510) 670-0589—Fax to Technical Support.
