PSN-L Email List Message

Subject: Re: Analog Devices & Strong Motion Arrays
From: aheerfor@......
Date: Mon, 23 Aug 1999 20:57:27 +0200



>
Which ones do you have, the ADXL05s?
<
Yes

>
They have two new
models ADXL105 (replaced ADXL05) and ADXL202. I am
wondering if these have better performance.
<
From my study of the data sheets, I gather that they don't have a
significantly better performance.


>Also, I am
on the fault line in a quiet area, so I am wondering
if that makes a difference.
<
It does. You may get stronger motion than here. I am far from any fault
line.


> It is a complete waste of
time trying these for strong motion?
<

No, the devices are fine for strong motion. Say, when you are at the
epicenter.
And when your seismometers are driven into saturation.

Bruel and Kjaer make many fine accellerometers. One of these has an
extremely fine S/N ratio compared to other accellerometers.

Regards, Anders



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Larry Cochrane <cochrane@..............>