[wxqc] Wind errors after rain - Davis Vantage Pro 2

[Bryce Alexander]

It could still be both, a kind of cause and effect relationship. If the
water is shorting a contact, then the anemometer could be sending invalid
data and the software, not knowing what to do with that invalid data falls
to a kind of default mode.

Since this is consistently happening a few minutes after rain, and not at
other random times the cause will certainly be related to rain (think
water). The effect is how the software reacts to that event. 

I do not know if you are wired to the sensor, or using the wireless feature,
so it can be difficult to pinpoint the location of the water short across
the internet. It could be in one of the modular phone connections, or it
could be on the circuitry that sends the signal to either the radio or the
wire.  Wherever it is, look for places where a tiny drop of water can touch
wires or circuit boards; especially inside taped or modular connectors.

-----Original Message-----
From: wxqc-bounces at lists.gladstonefamily.net
[mailto:wxqc-bounces at lists.gladstonefamily.net] On Behalf Of Steve Dimse
Sent: Saturday, June 09, 2007 10:48 AM
To: Discussion of weather data quality issues
Subject: Re: [wxqc] Wind errors after rain - Davis Vantage Pro 2

What is interesting is the data show a very consistent wind speed pf  
98 MPH, and a gust of 100 or 101. This really makes me suspect a  
software error rather than a sensor error.

KB5FNN>APRS,TCPXX*,qAX,FIRST:@081538z3540.78N/ 
09124.62W_360/008g013t069r047p058P058h93b10157.DsVP
KB5FNN>APRS,TCPXX*,qAX,FIRST:@081543z3540.78N/ 
09124.62W_192/098g100t069r034p059P059h93b10157.DsVP
KB5FNN>APRS,TCPXX*,qAX,FIRST:@081548z3540.78N/ 
09124.62W_172/098g101t069r021p060P060h93b10159.DsVP
KB5FNN>APRS,TCPXX*,qAX,FIRST:@081553z3540.78N/ 
09124.62W_205/098g101t069r017p062P062h92b10159.DsVP
KB5FNN>APRS,TCPXX*,qAX,FIRST:@081603z3540.78N/ 
09124.62W_190/012g099t070r009p062P062h92b10164.DsVP
KB5FNN>APRS,TCPXX*,qAX,FIRST:@081608z3540.78N/ 
09124.62W_200/010g016t070r005p062P062h91b10164.DsVP
KB5FNN>APRS,TCPXX*,qAX,FIRST:@081613z3540.78N/ 
09124.62W_178/007g016t071r004p062P062h89b10164.DsVP

The question is whether these high values come out of the Davis. Does  
your unit have a peak wind recall function? If so, does it show 101  
gusts yesterday? That would at least narrow it down to the weather  
station and its firmware.

Steve K4HG

On Jun 9, 2007, at 12:36 PM, Bryce Alexander wrote:

> Sounds like you are getting water into your electrical contacts, I  
> would recommend inspecting the anemometer for any wires or circuit  
> boards that are exposed to the elements.
>
>
>
> From: wxqc-bounces at lists.gladstonefamily.net [mailto:wxqc- 
> bounces at lists.gladstonefamily.net] On Behalf Of Carroll Fletcher
> Sent: Saturday, June 09, 2007 8:38 AM
> To: wxqc at lists.gladstonefamily.net
> Subject: [wxqc] Wind errors after rain - Davis Vantage Pro 2
>
>
>
> Hi Folks,
>
> I recently moved my ISS to a location about 150 feet from where it  
> has been for over a year and placed it on a tower about 25 feet  
> above the ground to clear some possible wind blocks (It was near a  
> railroad track where trains were occasionally parked) Since then  
> the two times it has rained, I have shown wind spikes (app. 100  
> mph) shortly after rain events.  The rest of the time everything  
> seems to work fine.
>
> Anyone ever seen this before?
>
> http://www.wunderground.com/weatherstation/WXDailyHistory.asp? 
> ID=KARNEWAR1&month=6&day=5&year=2007
> http://www.wunderground.com/weatherstation/WXDailyHistory.asp? 
> ID=KARNEWAR1&month=6&day=8&year=2007
> http://www.findu.com/cgi-bin/wxpage.cgi?call=kb5fnn
>
> Thanks,
> Carroll
> -- 
> ----------------------------------------------------
> Hatred does not cease in this world by hating, but by not hating;  
> this is an eternal truth.
> Buddha
>
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