Ted,

Tell us about your new vertical design seismo. What is the resonant period,
any pictures?

Gary

 

 

 

 

 

From: psn-l-request@.............. [mailto:psn-l-request@............... On
Behalf Of tchannel
Sent: Wednesday, April 29, 2009 8:02 AM
To: psn
Subject: Counts

 

Hi Folks,  I have two vertical sensors in test, both using Larry's one
channel board and DATAQ adc.   One of the boards is set for low gain and one
is set for high gain, using the jumper.

 

The first earthquake records was the 5.6m in Mexico April 27th.   Not
unexpected the counts on the one using high gain was 10x the one using low
gain.   Something like 70 vs 700.

 

Both traces looked fine and I could see little different, aside for the
counts.   My question is what should my count target be?   Someone may have
indicated about 100 to 300 counts during the quiet of night?

 

The reason I ask is I see data files posted with many using higher counts
700 or 800, instead of smaller numbers.    I know the higher gain feature on
the board is for lower voltage output.   My coil and magnets are similar to
Chris's quad magnet arrangement, and a coil of 4000 turns, so I have plenty
of voltage.

 

I would like your opinions and why.

 

 

Thanks, Ted














Ted,

Tell us about your new vertical design seismo. What is =
the resonant
period, any pictures?

Gary

 

 

 

 

 





From:=
 =
psn-l-request@..............
[mailto:psn-l-request@............... On Behalf Of tchannel

Sent: Wednesday, April 29, 2009 8:02 AM

To: psn

Subject: Counts





 



Hi
Folks,  I have two vertical sensors in test, both using Larry's one
channel board and DATAQ adc.   One of the boards is set for =
low gain
and one is set for high gain, using the jumper.





 





The
first earthquake records was the 5.6m in Mexico April 27th.   =
Not
unexpected the counts on the one using high gain was 10x the one using =
low
gain.   Something like 70 vs 700.





 





Both
traces looked fine and I could see little different, aside for the
counts.   My question is what should my count target =
be?  
Someone may have indicated about 100 to 300 counts during the quiet =
of
night?





 





The
reason I ask is I see data files posted with many using higher counts =
700 or
800, instead of smaller numbers.    I know the higher =
gain
feature on the board is for lower voltage output.   My coil =
and
magnets are similar to Chris's quad magnet arrangement, and a coil of =
4000
turns, so I have plenty of voltage.





 





I
would like your opinions and why.





 





 





Thanks,
Ted