Davis Vantage Pro ISS, 2003 & later User Manual download pdf (Page 20)

Troubleshooting: The Most Common Anemometer Problems

The Most Common Anemometer Problems

Note: If the anemometer is sending no data, the wind display indicates 0 speed and a North direction.

“The anemometer head is tilted when I mount the anemometer.”

With your Allen wrench, loosen the screws holding the anemometer head on the arm.

(The screws are on the bottom of the anemometer head, by the wind cups.) Turn the

anemometer head so it is straight and then tighten the screws.

“The wind cups are spinning but my console displays 0 mph.”

The signal from the wind cups may not be making it back to the display. Remove the cups

from the anemometer (loosen the set screw shown on page 4). Put the cups back onto

the shaft and adjust them up or down 1/16 – 1/8 inch (1.5 – 3 mm). Check your cables for

visible nicks and cuts. Look for corrosion in the “WIND” jack on the SIM and on splices in

the cable (if any). If you are using an extension cable, remove it and test using only the

anemometer cable. If you still haven’t resolved the problem, contact Technical Support

and ask for a wind test cable.

“The wind direction is stuck on north, or displays dashes.”

It is likely that there is a short or break somewhere between the wind vane and the

display. Check your cables for visible nicks and cuts. Look for corrosion in the “WIND”

jack on the Sensor Interface Module and on splices in the cable (if any). If possible,

remove any extensions and try with the anemometer cable only. If none of these steps

get the wind direction working, contact Technical Support and ask for a wind test cable.

“The wind cups don’t spin or don’t spin as fast as they should.”

First check for and clear out any spider webs. Also, the anemometer may be located

where wind is blocked by something, or there may be friction interfering with the cups’

rotation. Friction usually can be remedied by the user — remove the wind cups (loosen

the set screw shown on page 4) and clear out any bugs or debris. Turn the shaft the cups

rotate on. If it feels gritty or stiff, contact Davis Technical Support. 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.

“Wind readings aren’t what I expected them to be.”

Comparing data from your ISS to measurements from TV, radio, newspapers, or a

neighbor is NOT a valid method of verifying your readings. Wind speed and direction can

vary considerably over short distances. How you site the anemometer can also make a

big difference. If you have questions, contact Technical Support.

Contacting Davis Instruments

If you have questions about your ISS or Vantage Pro Station, or encounter problems

installing or operating your weather station, please contact Davis Technical Support.

Note: Please do not return items to the factory for repair without prior authorization.

(510) 732-7814 – Technical Support phone, Monday – Friday, 7:00 a.m. – 5:30 p.m.

Pacific Time.

(510) 670-0589 – Technical Support Fax.

suppor[email protected] – E-mail to Technical Support.

[email protected] – General e-mail.

www.davisnet.com – Download manuals and specifications from the Support

section. Watch for FAQs and other updates. Subscribe to the e-newsletter.

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Davis Vantage Pro ISS, 2003 & later User Manual Page 20

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