PSN-L Email List Message
Subject: Re: Gulf Of California on a seismic Detector
From: ChrisAtUpw@.......
Date: Wed, 4 Jan 2006 11:25:14 EST
In a message dated 04/01/2006, ian@........... writes:
Hi,
thanks for the reply, I'm still working through it! In the meantime, I
don't have any good pictures but here is a drawing of the housing that I just
quickly sketched: _http://www.iasmith.com/housing.jpg_
(http://www.iasmith.com/housing.jpg) .
I have no heater. I had hoped to avoid one but sounds like I need to
consider it.
Hi Ian,
It is not very easy to seal the open top of a box like this. You might
be able to do it with foam strip around the edge or the bottom of the
thermawall cavity board plug.
I would be inclined to get a big sheet of polythene (~9ft square damp
proof membrane?) from a builder's merchant, drape it over the top and to the
ground all around the box, fold in the corners and secure them with tape or
string. This is in place of the multi layer paper sheet. Alternatively, you
could use gaffer tape either to seal the paper to the sides of the box, or tape
the existing top sheet to a surrounding paper wrap. Then put the sarking board
lid on the box.
I suspect that you will need some form of heating inside the case. You
will probably need at least 10 watts. Power resistors are preferable to
filament bulbs, which tend to attract insects. Can you 'acquire' a large cardboard
box to put over the top of the existing case?
Regards,
Chris Chapman
In a message dated 04/01/2006, ian@........... writes:
<=
FONT=20
style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000=20
size=3D2>Hi,
thanks for the reply, I'm still working through it! =20=
In the=20
meantime, I don't have any good pictures but here is a drawing of the hous=
ing=20
that I just quickly sketched: http://www.iasmith.com/housing=
..jpg=20
.
I have no heater. I had hoped to avoid one but sounds=
=20
like I need to consider it.
Hi Ian,
It is not very easy to seal the open top of a b=
ox=20
like this. You might be able to do it with foam strip around the edge or the=
=20
bottom of the thermawall cavity board plug.
I would be inclined to get a big sheet of polyt=
hene=20
(~9ft square damp proof membrane?) from a builder's merchant, drape it over=20=
the=20
top and to the ground all around the box, fold in the corners and secure the=
m=20
with tape or string. This is in place of the multi layer paper sheet.=20
Alternatively, you could use gaffer tape either to seal the paper to th=
e=20
sides of the box, or tape the existing top sheet to a surrounding paper wrap=
..=20
Then put the sarking board lid on the box.
I suspect that you will need some form of heati=
ng=20
inside the case. You will probably need at least 10 watts. Power resistors a=
re=20
preferable to filament bulbs, which tend to attract insects. Can you 'acquir=
e' a=20
large cardboard box to put over the top of the existing case?
Regards,
Chris Chapman
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