outside temp and wind correlation

RaDiOalarm · Post by **RaDiOalarm** » Sun 01 Dec 2013 11:19 am

Yesterday I took off my WS1080 wind sensor home to fix direction problems (replaced 3 reed switches, they were clicking, but not making contact). Anyway, I put it back today, and rushed to check my graphs. Wind was fine, but I noticed, that temperature graph was a lot more 'spiky' with wind sensor connected:

temp.png

I also realized, that I rarely see 'flat' temp graphs. What happened? Wind sensor has influence on temp sensor schematics?

AllyCat · Post by **AllyCat** » Sun 01 Dec 2013 4:30 pm

Hi,

Yes, the transmitter unit uses the same A/D converter for the Wind Direction and External Temperature.

Furthermore, the wind cable is "continuously" connected to the A/D input, so interference (or crosstalk) from the anemometer can easily occur (particularly with extended cables or if there is any moisture across the contacts). The microcontroller selects which A/D conversion is performed, by applying a voltage to the "other side" of the vane resistors (or internal thermistor).

Cheers, Alan.

RaDiOalarm · Post by **RaDiOalarm** » Sun 01 Dec 2013 5:56 pm

Sheesh, so much for "precision" instrument

Thanks for answer.

Cumulus Support

outside temp and wind correlation

outside temp and wind correlation

Re: outside temp and wind correlation

Re: outside temp and wind correlation