I have a sensor that's reporting bad temperatures.  It's outdoors in northern 
Vermont but reported the temperature this afternoon as 85°F.  That's just 
wrong.  The probe is buried in the garden (to be ready to monitor soil 
temperatures in the spring), and the ground is frozen hard.  It's nothing like 
85°.  The air temperature on the other side of the garden (above ground!) was 
27°.  I've been thinking that the sensor was dying and was reporting nonsense.

But I realized today that 27°C is something like 83°F.  So now I'm thinking the 
scale is getting messed up somewhere along the line.  Something is getting 
Fahrenheit when it expects Celsius, and converts it an extra timr.  85°F is 
29°C, and 29°F sounds about right.  Has anyone seen this kind of error before?  
Does it sound like I'm on the right track?

Weewx isn't the source of the problem.  The bad number (complete with °F) shows 
on the monitor on my Meade TE923W.  All of my other readings are in Fahrenheit 
and seem reasonable in relation to each other.  But this sensor is kind of 
inaccessible for the winter, so I'm thinking of using weewx to fix it for now.  
I'll deal with the sensor in the spring.

Am I right that this sounds like a use for [[Corrections]]?  I just create a 
line like
extraTemp1 = (extraTemp1 - 32) * 5/9
and then the corrected reading will be saved in the database?  Is there a way 
to adjust the existing values in the reports?  Or can I fix the existing 
records in the database? 

Thanks a lot.

Lynda 

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