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 Stevenson screens 
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 Post subject: Re: Stevenson screens
PostPosted: Wed Jan 28, 2015 11:16 am 
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Location: Brampton
Altitude: 117m
Weather Station: Davis VP2
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darrog wrote:
Paul - thanks and I have also sent you an e-mail to confirm that our stands have the same dimensions, which is a fairly important starting point!
What I see in your photos is about what I expected, but a few points:

1.) If the legs of a new screen have pre-drilled holes in the centre, could you line them up with the holes that you
would have to drill into the stand by which to attach both together.
Looking at your photos I'm not sure if you could.

THERE ARE NO HOLES PRE DRILLED THAT YOU COULD USE, THE ONES VISIBLE ARE BELOW WHERE THE SCREEN WOULD SIT.

2.) Your bracket/bar which screws into the screen - so that bar is not attached to the stand in anyway?
that surprised me - so I'm thinking that this bar must be prevented from being pulled up by the frame of
the stand?
I think that I would need one - if the worst was to come to the worst I could have one made.
iTS A LONG STRIP OF METAL WHICH RUNS THE LENGTH OF THE SCREEN, IT HANGS BELOW AND WHEN TIGHTENED UP CLAMPS THE UNDERSIDE OF STAND, THE PRESSURE OF THE SCREWS HOLDS IT IN PLACE - YOU WOULD NEED TO KNOW IF IT COMES WITH A CLAMP OR HOLES IN THE UNDERSIDE OF THE SCREEN

this really should be more straight forward than it is proving!!

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 Post subject: Re: Stevenson screens
PostPosted: Wed Jan 28, 2015 7:17 pm 
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Joined: Mon Nov 02, 2009 10:23 pm
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Location: Maulds Meaburn, Cumbria
Altitude: 183
Weather Station: Davis VPro2
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The bar is definitely the best way - the weather Shop have e-mailed their supplier to ask the relevant Q's.

apparently the supplier is the sole licensed producer of these screens and supplies to the Met'O.

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 Post subject: Re: Stevenson screens
PostPosted: Wed Jan 28, 2015 10:49 pm 
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Location: Maulds Meaburn, Cumbria
Altitude: 183
Weather Station: Davis VPro2
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Stephen Burt has offered these observations:

I bought my screen from Weathershop (I assume you mean the outfit based in Sussex?), so as far as I can be sure we're talking about the same unit. The dimensions were certainly the same, anyway.

The screens are made by Metspec (Jonathan Wright) - more details on http://www.metspec.net/ - that's who Weathershop purchase from (the only supplier in fact).

It may be that in the almost 4 years since I purchased mine that the mounting has changed so that they are fixed by bolts through the legs rather than clamped via the underside bar as in my photographs. If that was the case, then surely you would be able to drill holes to suit in your existing steel stand, and fix with suitable bolts? The pictures on the Metspec site suggest this is how they are fixed - but if so, I haven't seen one of this pattern personally. I'm sure Weathershop will be able to tell you, but of course they will want to sell you a stand too if they can!

One answer is of course to purchase the screen, then assess when it arrives whether you can adjust your existing screen stand to fit the new screen - by either drilling holes in the stand or in the screen base to clamp to an underside bar like mine if necessary. (I've just been out to look closely at mine, brr, that wind is cold - and the bolts fit straight through the screen base and a supporting spar that runs along the long axis. It would be easy enough to drill these holes yourself - if necessary I can send you photographs to guide you - and fix to an angled aluminium spar underneath like mine.)


I'm going to ring Metspec direct tomorrow

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 Post subject: Re: Stevenson screens
PostPosted: Sat Jun 27, 2015 10:12 pm 
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Location: Maulds Meaburn, Cumbria
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Weather Station: Davis VPro2
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The new screen arrived yesterday and is now in place.
If I knew how to reduce the file size of a photo' I'd attach one.

The old one took a while to get off, but came out cleaner than expected and with some repairs could be good for a while longer.

The new one fitted easily and I must say, looks good. Add in no more sanding/painting, etc and I'm a happy chappy.

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Maulds Meaburn


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 Post subject: Re: Stevenson screens
PostPosted: Sun Jul 05, 2015 1:11 pm 
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Joined: Mon Nov 02, 2009 10:23 pm
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Location: Maulds Meaburn, Cumbria
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Weather Station: Davis VPro2
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The new screen
Attachment:
s6.jpg
s6.jpg [ 139 KiB | Viewed 472 times ]



the magic metal bar

Attachment:
s5.jpg
s5.jpg [ 81.01 KiB | Viewed 472 times ]


don't tell Paul, but I've even upgraded to a large Tupperware container for my WB water reservoir!


Attachments:
s8.jpg
s8.jpg [ 89.33 KiB | Viewed 472 times ]

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Darren Rogers - he who submits the most interesting posts, AKA Mr Data
Maulds Meaburn
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 Post subject: Re: Stevenson screens
PostPosted: Sun Jul 05, 2015 1:15 pm 
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Location: Maulds Meaburn, Cumbria
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One curiosity though for those with one of these screens - where to put your measuring jar now you no longer have the handy little recess found in old screens?

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Darren Rogers - he who submits the most interesting posts, AKA Mr Data
Maulds Meaburn


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 Post subject: Re: Stevenson screens
PostPosted: Sun Jul 05, 2015 10:20 pm 
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Location: Bolton le Sands
Altitude: 10
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I attach mine to the back of the thermometer carrier. I guess your has two doors also, so for me its easy to get at. I can post a pic when there is some daylight if it would be helpful.

Mike

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www.lancastrian-imaging.co.uk/sp/weather/


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 Post subject: Re: Stevenson screens
PostPosted: Mon Jul 06, 2015 11:33 am 
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Location: Maulds Meaburn, Cumbria
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Weather Station: Davis VPro2
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Mike - photo would be useful, thanks.

I can just imagine that on a windy day the jar will get moved about and break and at £40 inc VAT + P+P, there not cheap.

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Maulds Meaburn


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 Post subject: Re: Stevenson screens
PostPosted: Mon Jul 06, 2015 11:36 am 
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Location: Maulds Meaburn, Cumbria
Altitude: 183
Weather Station: Davis VPro2
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HOW DO THESE NEW SCREENS EFFECT TEMP READINGS?

could almost be a new thread, but since my screen as been up there has been a change.

My max' temps have increased - that's in comparison to my AWS
previously my screen had lower Max's - now they are = and on the odd occasion slighter higher, that never used to happen.

Min' temps - at present are remaining the same as before, ie: the screen lower by 0.2 - 0.5c

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Maulds Meaburn


Last edited by darrog on Mon Jul 06, 2015 11:32 pm, edited 1 time in total.

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 Post subject: Re: Stevenson screens
PostPosted: Mon Jul 06, 2015 6:30 pm 
Chief Area Forecaster
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Joined: Mon Nov 02, 2009 9:25 pm
Posts: 5329
Location: Drumburgh
Altitude: 7m
Weather Station: Davis VP2
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darrog wrote:
One curiosity though for those with one of these screens - where to put your measuring jar now you no longer have the handy little recess found in old screens?


Looks good!

Measuring jar in screen - I've never put mine in the screen. I always pop it on a piece of wood
driven into the ground next to the gauge.

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http://www.coggabata.co.uk/weather.html


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