Ah, I think I found the problem.

Sometime ago I used a wet/dry and the hourly metar readings from
Southend Airport and compared each hour with what my Davis was
reading. I calculated the average deviation and made the necessary
adjustment on the console. Subsequently, I 'tweaked' the reading up by
7%. Unfortunately I seem to remember I was told that the accuracy
above 90% RH is not good with these sensors and upto now I have not
had a problem. However, I obviously need to tweak things back a tadge.

I have tweaked it back 3%...

All the same I will have another monitoring excersise to do.

Thanks

Keith (Southend)

***********************
Weather Home & Abroad
http://www.southendweather.net

On Wed, 20 Oct 2004 18:56:59 +0100, "Will"
wrote:



keith.r.harris wrote in message ...
I see that the humidity in my back garden is 103% ~ what next!

Anyone else encountered this problem? Is it possible I just need to make a
software adjustment?

Keith (Southend)



Keith my Davis measures humidity and calculates dewpoint on the console ?
The humidity instrument will only go from 0 to 100%. So I cannot understand what
you mean by software ? Does your Davis measure other humidity variables and
calculate humidity ? In which case your formula needs investigation.

Will.