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 41 
 on: September 29, 2009, 11:22:47 AM 
Started by Cookie - Last post by Cookie
At the weekend, looks like it could be windy for scotland over the weekend. not as bad as a few weeks back. but could be 50 mph to 60 mph in places

 42 
 on: September 28, 2009, 12:51:16 PM 
Started by Ballogieweather - Last post by Shetland Coastie
Hi Martin

Only just read this lol. No I wasn't around in any case I was down at the school doing my CSOC (which I passed thankfully!).

Hi all

Turned decidedly more chilly up here in the last few days and the heating is on. Top temp today is just 11C and its falling again. Fairly strong WNW airflow, very autumnal. Also the ground is going to sleep, did what will probably be my last cut of the grass last week.

 43 
 on: September 27, 2009, 06:39:06 PM 
Started by munrobaggins - Last post by Cookie
yeah, I have been speaking to him and hes hopeing to set up something group or similar for a people with an intrest in the weather on lewis,

which would be great

 44 
 on: September 27, 2009, 06:37:50 PM 
Started by Budgie - Last post by Cookie
I was only jokeing  anyway lol

 45 
 on: September 27, 2009, 12:27:27 PM 
Started by Budgie - Last post by Budgie
No just you, although I did notice a hundred visits from you, but that number was from individual visitors rather than page hits as it looks at IP addresses.  Wink

 46 
 on: September 27, 2009, 12:25:00 PM 
Started by munrobaggins - Last post by Budgie
I do indeed, and that reminds me that I must get in contact with him again and meet up.
He emailed me after the rainstorm that we had over the town a few months back.  Wink

 47 
 on: September 27, 2009, 01:39:47 AM 
Started by munrobaggins - Last post by Cookie
thiers a another member of torro who works at the college do you know him?

 48 
 on: September 27, 2009, 01:39:06 AM 
Started by Budgie - Last post by Cookie
Just checked my visitor figures for yesterday, normally I get an average of 140 to 160 unique visitors per day with 250 to 320 page views.
Yesterday saw 648 unique visitors and 1409 page views!!  Grin

that was me, lol way to much time on you're site :lol:

 49 
 on: September 20, 2009, 09:57:16 PM 
Started by Budgie - Last post by skyewright
Well...that is what Trials are for I guess....and you have definitely proved that the current setup is incorrect.
Indeed.
After writing the earlier message I took a look at the debug data (every minute I have the code dump the "1 second" data records to a text file). In that the problem was very obvious with great swathes of zeros.
It looks as though clipping is cutting out anything above about 16Hz, so any rotation at above the mid 30's mph is getting lost.
The theoretical clip for the current combination (10K ohm & 220nF) is 72Hz.
10K ohm & 100nF give a theoretical clip of 15.9Hz, but I'm sure I didn't accidentally use a 100nF as the ones I have of those types look entirely different. There may of course be additional unknown factors in the circuit...

Quote
Shame that you now have to wait for decent Wx to gain access to execute a change.
In theory I could have a wire pair running all the way from the anemometer to the office as there is a length of 6 core alarm wire running alongside the UTP, though I'd need to open up the IP65 control box to swap those wires over anyway. The resulting wire run would be around 50m; even the 11m or so between the anemometer and the control box seemed to be of great concern to Eric V so the idea of 50m would probably give him nightmares!

Quote
It would seem that the old fashioned direct connection via the Inspeed serial port (to USB converter in my case), to the PC and thence WD is actually very good methodology....It certainly checks out very well with my Davis anemometer..
Yes, though, as we have worked out, that also uses a Low Pass filter. Hopefully it's just a matter of getting the values right; the great difficulty is in testing any particular set of values.

I wonder if the Weather Shop will be doing a Christmas special on VP2's this year. LOL!

 50 
 on: September 20, 2009, 07:09:49 PM 
Started by Budgie - Last post by munrobaggins
...It looks as though the filter is too low and is "clipping" good data...  Sad

... 1st attachment. It's "unknown" for the WMR918 'wind' to be greater than the Vortex except in a near flat calm.

I've just switch over to the WMR200 for the present. 2nd attachment is a WD screen - the effect of windspeed of the change over to the WMR200 at just after 1800 is pretty obvious!

Well...that is what Trials are for I guess....and you have definitely proved that the current setup is incorrect.

The graphs certainly show that the Inspeed data flow is in error somewhere..

Shame that you now have to wait for decent Wx to gain access to execute a change.

It would seem that the old fashioned direct connection via the Inspeed serial port (to USB converter in my case), to the PC and thence WD is actually very good methodology....It certainly checks out very well with my Davis anemometer..


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