ahhh, I see now. as for how to take them apart, if you look very carefully at the picture of the KS-54000 (I assume they are similar in construction), at the base there appears to be threads. from this I would think the outer casing simply screwed off. just a note, if they have been in the ground all this time I would guess any threads would probably be corroded. I agree that they should be tested and one of the noisy ones should be disassembled first to see exactly what the deal is. -Travis >From: ChrisAtUpw@....... >Reply-To: psn-l@.............. >To: psn-l@.............. >Subject: Re: KS36000 seismos and assumptions? >Date: Sat, 28 Apr 2001 23:19:37 EDT >MIME-Version: 1.0 >Received: from [216.100.224.130] by hotmail.com (3.2) with ESMTP id >MHotMailBCB4D5DE00A64004318FD864E0820D910; Sat Apr 28 20:30:46 2001 >Received: from imo-m01.mx.aol.com (unverified [64.12.136.4]) by >sys5.webtronics.com (Rockliffe SMTPRA 4.5.4) with ESMTP id >for ; Sat, 28 Apr >2001 20:21:46 -0700 >Received: from ChrisAtUpw@......... imo-m01.mx.aol.com (mail_out_v30.10.) >id x.cd.5d6619a (4002) for ; Sat, 28 Apr 2001 >23:19:37 -0400 (EDT) >From larry_cochrane@.............. Sat Apr 28 20:31:21 2001 >Message-ID: >X-Mailer: AOL 6.0 for Windows UK sub 58 >Sender: psn-l-request@.............. > >In a message dated 29/04/01, travis5765@........... writes: > > > I can't remember who exactly said it but someone said (in this mailing >list) > > that the sensors are sealed with a gas around them to prevent noise. I >am > > assuming that if you take them apart the gas will leak out and cause >noise > > (probably the reason for the noisy channels in the first place). > > If you go the the GeoTech site http://www.geoinstr.com/ and have a >look at their current borehole seismos, they show a stripped down photo. >There are three gold coloured cylinders suspended in the centre section >which >are presumably the sealed units. I would expect them to have very low >pressure gas in them. This allows cooling but inhibits convection. There >will >probably be metal glass leadthroughs somewhere for the wiring. I would >suggest that the instruments be tested if possible and only ones with >faulty >units be stripped down. It looks as if the main case can be stripped off - >there has to be some way to make them! The current instruments seem to have >the electronics inside them and require 24 V DC. > If anyone could find a manual, one of which would probably be >provided >with every instrument of this sort of cost, it would be most helpful. The >manual of one of our 'scopes had "WHEN ALL ELSE FAILS, TRY READING THIS >MANUAL" printed on the cover! > Regards, > > Chris Chapman > _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com __________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>