PSN-L Email List Message
Subject: Re: Guralp seismo
From: Dave Nelson dave.nelson@...............
Date: Sun, 03 May 2009 13:26:19 +1000
When I visited the USGS.NEIC HQ in Golden, Colorado in 2006,
John McMillan whas the lab tech that showed us lots of wonderful
amongst that were the Gulrap Horiz and Vert seismo's
maybe the same as you have acquired :) I dont
know if John is still there
but a phone call to there may get you some data sheets anyway
see how you go
At 10:23 PM 5/2/2009 -0400, you wrote:
I've come into possession of a late 80's vintage Guralp vertical force
Unfortunately, it has no model information. It has a
3"x9" (waterproof-ish but not borehole-
ready) cylindrical sensor with very nice brass workings inside.
There is also an amplifier
package in an aluminum cylinder. It appears to use capacitive
position sensing, a force
feedback coil, and a triangular leaf spring to give about a 2-Hz
mechanical period. It
has remote centering with a gearmotor, and a manual mass clamp for
sensor has a cable coming out the bottom with a 10-pin MS connector on
the end, and
three pointed feet. The sensor part looks pretty straightforward,
and I'm tracing the amp
circuit (this will take a while).
This unit doesn't appear to be on Guralp's website.
Anyone have any idea what I
have here? I can take some pictures if it'll help.
gotten obsolete information out of Guralp before?
[ Top ]
[ Back ]
[ Home Page ]