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uk.sci.weather (UK Weather) (uk.sci.weather) For the discussion of daily weather events, chiefly affecting the UK and adjacent parts of Europe, both past and predicted. The discussion is open to all, but contributions on a practical scientific level are encouraged.

Barograph instructions



 
 
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  #1  
Old May 6th 09, 11:56 PM posted to uk.sci.weather
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Posts: 20
Default Barograph instructions

I've finally added an aneroid barograph to my equipment. There are rather
more knobs and screws on it than I thought and as it's pre-owned there are
no instructions. Does anybody know where I can find some practical
instructions on setting up and using a barograph? Thanks.

Terry


  #2  
Old May 7th 09, 07:02 AM posted to uk.sci.weather
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Posts: 1,267
Default Barograph instructions

On Wed, 6 May 2009 23:56:47 +0100, "Terry Holmes"
wrote:

I've finally added an aneroid barograph to my equipment. There are rather
more knobs and screws on it than I thought and as it's pre-owned there are
no instructions. Does anybody know where I can find some practical
instructions on setting up and using a barograph? Thanks.


I have one on the wall: adjust the reading arrow by carefully
inserting a thin screwdriver on the reverse side. This will allow the
prsssure to be the same as the nearest Observation site.
It must be 15-20 years since I walked in to someone's home to find one
that is reading correctly.
Therefore the front cover 'arrow' will, if regularly tweeked, will
tell you the daily trend.
On the other hand, I wonder if this is a much more advanced model and
you are requiring build from scratch. I rather think you are!

R
  #3  
Old May 7th 09, 08:17 AM posted to uk.sci.weather
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Posts: 1,750
Default Barograph instructions

"Robin Nicholson" wrote in
message ...
On Wed, 6 May 2009 23:56:47 +0100, "Terry Holmes"
wrote:

I've finally added an aneroid barograph to my equipment. There are
rather
more knobs and screws on it than I thought and as it's pre-owned
there are
no instructions. Does anybody know where I can find some practical
instructions on setting up and using a barograph? Thanks.


I have one on the wall: adjust the reading arrow by carefully
inserting a thin screwdriver on the reverse side. This will allow
the
prsssure to be the same as the nearest Observation site.
It must be 15-20 years since I walked in to someone's home to find
one
that is reading correctly.
Therefore the front cover 'arrow' will, if regularly tweeked, will
tell you the daily trend.
On the other hand, I wonder if this is a much more advanced model
and
you are requiring build from scratch. I rather think you are!



.... I think Terry is talking about a baro*graph*, i.e., a
self-recording unit with a chart on a drum which goes round once per
week etc. The adjustment is usually via a milled-head screw somewhere
above the aneroid cluster.

The 'Observer's Handbook' has some basic instructions of care and use
of the barograph - I have a copy from which I could copy & email the
relevant sections. For more 'in depth' work on maintaining these,
you'll need to get hold of the Handbook of Meteorological
Instruments - someone may have a copy reading this and be able to help
with extracts etc., but you may be able to purchase a second-hand copy
from someone like Amazon.

Martin.


--
Martin Rowley
West Moors, East Dorset (UK): 17m (56ft) amsl
Lat: 50.82N Long: 01.88W
NGR: SU 082 023


  #4  
Old May 7th 09, 08:24 AM posted to uk.sci.weather
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Posts: 1,130
Default Barograph instructions

I've finally added an aneroid barograph to my equipment. There
are rather more knobs and screws on it than I thought and as
it's pre-owned there are no instructions. Does anybody know
where I can find some practical instructions on setting up and
using a barograph? Thanks.
Terry


I used to have one for use in the glider until SKS nicked it. I
don't recall it having many knobs and screws at all. Just a
switch for the expected duration of recording, a winding knob
and an on/off switch IIRC.

Anne


  #5  
Old May 7th 09, 12:53 PM posted to uk.sci.weather
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Posts: 1,164
Default Barograph instructions


"Terry Holmes" wrote in message
...
I've finally added an aneroid barograph to my equipment. There are rather
more knobs and screws on it than I thought and as it's pre-owned there are
no instructions. Does anybody know where I can find some practical
instructions on setting up and using a barograph? Thanks.

Terry


Terry
If this is a Casella unit similar to this one
http://homepage.ntlworld.com/gesc_b/.../Barograph.htm then I
can provide you with instructions. Otherwise I suggest you contact the
people at Barometer World http://www.barometerworld.co.uk/ whom I've always
found very helpful.

Moving on -Anne mentions barographs in gliders and no doubt Jack will
remember using these as well. The purpose was to measure both height gained
and flight duration to support various badge claims. The barographs were
simpler but much more robust than those used for meteorological observing.
The flight trace and height change could be recorded on the drum in a
number of ways-ink trace on paper, scratching a line on scratch sensitive
paper or most often scratching a trace on a smoked silver foil. The last
mentioned required a silver foil chart,already on the drum, to be coated
with a thin, even layer of soot by holding it above a candle. The drum and
foil were then replaced onto the barograph, clock wound up and the unit
sealed and signed with tape before being replaced securely in the glider.
The pilot was reminded to turn the barograph on before taking off. After the
flight the fun began. In order to preserve the trace for checking it had to
be fixed by carefully spraying with hair lacquer. A delicate operation which
could end in tears, best to aim the spray above the drum/foil and allow the
finer mist to cover the trace. Nowadays electronic recorders used - just got
to remember the batteries.


--
George in Epping, West Essex (107m asl)
www.eppingweather.co.uk
www.winter1947.co.uk
COL 36055


  #6  
Old May 7th 09, 09:34 PM posted to uk.sci.weather
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Posts: 1,267
Default Barograph instructions

On Thu, 7 May 2009 08:17:59 +0100, "Martin Rowley"
wrote:


... I think Terry is talking about a baro*graph*, i.e., a
self-recording unit with a chart on a drum which goes round once per
week etc.


So he was. I stared at this several times but had an early senior
moment. Doh!
R
 




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