Davis Weather Station,Anemometer reading incorrectly, why?

[Pilatus]

As above,any reason why windspeed reading slower than actual and wind direction changing direction slowly. Would low batteries in weather station be the cause,although it is solar powered? Thanks for any info.

 

[Paddington]

When you say actual are you comparing your reading with another close by ? Height above ground and nearby buildings,trees etc can affect readings. The Met Office standard is 10m above ground on an open test site and there are correction factors if your anemometer is below this. Are you getting a low battery warning on the console ? My weather vane is moving like a good 'un at the moment, but the wind direction is showing S to SW, don't know what the sampling period is for wind.

 

[rollestonpark]

After 5 years of use mine got stuck, then blew off.
I have had bearing problems after 5 years with these things
Chris
My online weather station:
http://rollestonpark.myzen.co.uk/

 

[Pilatus]

When you say actual are you comparing your reading with another close by ? Height above ground and nearby buildings,trees etc can affect readings. The Met Office standard is 10m above ground on an open test site and there are correction factors if your anemometer is below this. Are you getting a low battery warning on the console ? My weather vane is moving like a good 'un at the moment, but the wind direction is showing S to SW, don't know what the sampling period is for wind.

I have just held my hand held anemometer by Davis anemometer. Davis Reading “0”mph handheld “4.5 - 2.9”mph. New battery fitted to ISS unit , so I think new Anemometer arm will have to be ordered!.

 

[Pilatus]

Just cut a bush down that was partly sheltering weather station only to find it has made no difference . But did get earache from the Mrs