[Weather] termperature offset on Dalsemi station

[Steve Hendrix]

DS published an appnote about 7 years back that discussed 
stress-induced temp errors on the 18S20 that was used (I think) in 
the original 1-wire weather station. You may want to try just 
reflowing the connections on the troublesome temp sensor to see if 
that shifts the error any. If you can't find the appnote, email me 
off-list at SteveHx at HxEngineering.com and I'll send it to you.

Steve Hendrix

At 2007-03-30 11:34, Ernie Oporto wrote:

>You can see at the link below that my Dalsemi station seems to send 
>data that is 7-10 degrees off from other stations around me.  Most 
>of the time this is because my station is in the shade due to my 
>condo complex's rules about where I can mount things.  Of course, at 
>night, we are all in the shade and the temperature difference is 
>still there.  This is one of the original dalsemi 1-wire stations.
>
><http://www.findu.com/cgi-bin/wxnear.cgi?call=CW0861>http://www.findu.com/cgi-bin/wxnear.cgi?call=CW0861
>
>Surprisingly, the Trh in my humidity sensor (one of the original 
>humidity sensors that were sent out in samples) seems to show the 
>right temperature.  I'm sure I can fudge OWW to read the temp from 
>the humidity sensor for sending to <http://findu.com>findu.com, but 
>I'd like to see if I can get to the root of the problem and correct 
>the temp.  Is there any known issue I should be looking for that 
>might cause this?  Any recommendations?
>
>
>--
>Ernie
><http://www.shokk.com/blog/>http://www.shokk.com/blog/
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