[wxqc] Vantage Pro Vulnerability to High Humidity

[Victor Engel]

It appears that I've resolved the issue by reseating the anemometer. Before
I did this, I tried spinning it and elevating it by pressing a fingernail
against the hub while it was spinning. This produced a wind spike in the
data. So I loosened the anemometer elevated it as high as it would go,
jiggling the unit while doing so to allow the axle to descend a bit
(maybe?). Then I reset the set screw while the cups were elevated. This
seems to have done the trick. If the problem resurfaces, I may try
repositioning the magnet by inserting a shim under it.

I'm still curious why this happens only when close to 100% humidity. I'm
afraid the coil may be compromised.

On 11/5/06, Victor Engel <brillig at gmail.com> wrote:
>
> The last time a long period of high humidity came through, the windspeed
> of my station reported 0 until the high humidity period ended. Now we have
> high humidity again and windspeed is again reporting as zero.
>
> I've reported this to support, and they suggested an alignment adjustment
> to try to resolve the problem at first. When I pointed out that the readings
> came back on their own when it dried out, they suggested that if it happened
> again, I send it in for replacement.
>
> I have no problem doing so. It's still under warranty. I wonder, though,
> if there is a design flaw that makes this likely. Maybe there is some part
> of the electronics that is exposed to the elements and shouldn't be,
> resulting in a short in high humidity conditions. Can anyone suggest what I
> should look for when I take the anemometer down? Would a crack somewhere
> confirm this notion?
>
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