In a message dated 2006/10/26, jonfr500@......... writes:

> My geophone is now outside, in the hole, inside the bucket, filled with
> sand and wool type of material to isolate the cultural noise. Unfortunately
> I didn't find anything to seal the hole in the bucket for the plastic
> pipe that I use, but the hole and the pipe are both exactly 20 mm and it
> is on the side. So I don't expect water to be able to go inside the
> bucket that way. If it does, well, then I have to do some repairs (and
> upgrades).
> 
> For any suggestions, send them now because I am going to finish up soon.

Hi Jon,

       If you use plastic water pipe you can buy a 'tank' fitting with a 
rubber / plastic seal. You bore a hole in the lid and it bolts into place and onto 
the tube. Simple! 
       Alternatively, you can use a 'cable gland' which will seal just the 
cable into the bucket lid. This would be my choice.
       Do you have a tight fitting lid for the bucket? If you go to a house 
painter / decorator, they will likely have old plastic containers with 
waterproof lids available free. The water / emulsion decorating paints come in them. 
It might be a good idea to use silicone rubber to seal the lid in place? You 
should use the variety which does NOT smell of acetic acid / vinegar. 
Alternatively, use either self amalgamating rubber tape or good quality PVC tape.
       You do have one of Larry's 3 axis geophones in a plastic case, don't 
you?  http://psn.quake.net/geophone/index.html#L15B (12.6 cm OD by 7.3 cm high 
with 3 cm connectors on opposite sides) You may need to seal the lid on and 
seal the cable into the cable gland on the side. You may also need to plug the 
second cable lead in on the other side. It would be a good idea to put a packet 
of either silica gel crystals or of zeolite pellets inside the geophone case 
to absorb any moisture. Don't use any of the other dessicants - they may be 
corrosive (eg CaO, CaCl2)
 
       Regards,

       Chris Chapman
In a me=
ssage dated 2006/10/26, jonfr500@......... writes:



My geophone is now outside, in=20=
the hole, inside the bucket, filled with

sand and wool type of material to isolate the cultural noise. Unfortunately<=
BR>
I didn't find anything to seal the hole in the bucket for the plastic

pipe that I use, but the hole and the pipe are both exactly 20 mm and it

is on the side. So I don't expect water to be able to go inside the

bucket that way. If it does, well, then I have to do some repairs (and

upgrades).



For any suggestions, send them now because I am going to finish up soon.



Hi Jon,



       If you use plastic water pipe you can b=
uy a 'tank' fitting with a rubber / plastic seal. You bore a hole in the lid=
 and it bolts into place and onto the tube. Simple! 

       Alternatively, you can use a 'cable gla=
nd' which will seal just the cable into the bucket lid. This would be my cho=
ice.

       Do you have a tight fitting lid for the=
 bucket? If you go to a house painter / decorator, they will likely have old=
 plastic containers with waterproof lids available free. The water / emulsio=
n decorating paints come in them. It might be a good idea to use silicone ru=
bber to seal the lid in place? You should use the variety which does NOT sme=
ll of acetic acid / vinegar. Alternatively, use either self amalgamating rub=
ber tape or good quality PVC tape.

       You do have one of Larry's 3 axis geoph=
ones in a plastic case, don't you?  http://psn.quake.net/geophone/index=
..html#L15B (12.6 cm OD by 7.3 cm high with 3 cm connectors on opposite sides=
) You may need to seal the lid on and seal the cable into the cable gland on=
 the side. You may also need to plug the second cable lead in on the other s=
ide. It would be a good idea to put a packet of either silica gel crystals o=
r of zeolite pellets inside the geophone case to absorb any moisture. Don't=20=
use any of the other dessicants - they may be corrosive (eg CaO, CaCl2)

 

       Regards,



       Chris Chapman