Difference in high temperature

[vaggos]

Hello to all
Today i had max temp 33,5 °C @ 11:56. I compare the temp with another thermometer and i see i big diference. Also in diagram i see that my temp max was about 30,3. Do you know whats the huppening and how i can correct it?
Thanks a lot
Vaggelis

[steve]

What type of thermometer did you compare it with, where is that thermometer located, and how do you know it is correct? Did the Fine Offset thermometer show higher or lower than the other thermometer? The radiation shield on the Fine Offset temperature sensor isn't particularly good, and it will tend to show higher temperatures if the sun shines on it.

[vaggos]

I agree with you Steve. But look ad the diagram i attach. There is no anywhere 33,5 degrees.

[vaggos]

I attach also the fwto of my radiation shield. It is hand made by me and its working very good for 2 years. I have compare it with a davis in distance about 2 km and one another fine offset in 1 km. It is fan aspirated 24/24.

[steve]

But look ad the diagram i attach. There is no anywhere 33,5 degrees.

Not every value is plotted: http://wiki.sandaysoft.com/a/FAQ#The_pe ... eme_values

You've also restarted Cumulus, so the graphs are drawn from the data in the logs, and again, not every value is logged. The temperature around that time is not close to the max, so presumably you had a small jump in temperature around that time - according to the station, anyway.

[vaggos]

Steve
Thanks a lot. I dont have read it before.
Always kind
Again thanks
Vaggelis

[vaggos]

And a question off topic Steve. Three times a day, same time every day with a programm i reboot the pc. Is this problem for the data?
Again thanks in advance

[steve]

And a question off topic Steve. Three times a day, same time every day with a programm i reboot the pc. Is this problem for the data?

Not for the data, but it means the graphs get redrawn from the data logs at whatever interval you have set in Cumulus, rather than being at 1-minute intervals as they are from 'live' data.

[vaggos]

Thanks a lot Steve
Vaggelis