PSN-L Email List Message

Subject: Adjustment Help
From: "Karl Koth" karl@............
Date: Wed, 5 Mar 2003 18:13:44 -0700


Hello,

I have just built and setup a Lehman design seismometer. I built it for =
my school science fair, so keep in mind when replying that I am not in =
tune to all of the technical stuff. My questions have to do with =
adjusting the seismometer to record correctly.

Attached is a sample of the data that I am currently getting. I was =
wondering if I need to damp more or if I need to turn down the gain or =
adjust the offset. I am using Larry Cochrane's Amp/Filter board and his =
16 bit A/D converter board. I have also read about changing the period =
length, but I am not sure how to change it. Any help getting this data =
to look right would be appreciated.=20

thank you,
Karl Koth







Hello,
 
I have just built and setup a Lehman = design=20 seismometer. I built it for my school science fair, so keep in mind when = replying that I am not in tune to all of the technical stuff. My = questions=20 have to do with adjusting the seismometer to record = correctly.
 
Attached is a sample of the data that I = am=20 currently getting. I was wondering if I need to damp more or if I need = to turn=20 down the gain or adjust the offset. I am using Larry Cochrane's = Amp/Filter board=20 and his 16 bit A/D converter board. I have also read about changing the = period=20 length, but I am not sure how to change it. Any help getting this data = to look=20 right would be appreciated. 
 
thank you,
Karl Koth

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