Thread: Re: Time is of the essence

Started: 2007-01-17 00:47:30
Last activity: 2007-01-17 03:33:10
Topics: IRIS EPO
John or Jan Lahr
2007-01-17 00:47:30
Dennis,

I think you should be able to run with a gain of 20 or so. The trace
should always show some vibration.

John

At 03:49 PM 1/16/2007, you wrote:
I just recently received and as1 and was wondering what is the
optimal gain for the helicorder to where you get earthquakes but not
as much kid noise. I have mine set to 1 currently but is that
sensitive enough to pick up events?
On Jan 16, 2007, at 9:12 AM, Jerry Cook wrote:

Hi All,
I am having trouble with my computer clock. Every morning when I
come in I ping "atomic clock sync" and my clock is off by about 3.5
minutes. I have the program set to ping automatically but that only
happens once a day. Is there a way to automatically ping more
often? Why is my clock so inacurrate?
J. Bob
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Dennis Griner
5th Grade Highland Terrace
<dennis.griner<at>shorelineschools.org>dennis.griner<at>shorelineschools.org



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  • jerdell@cox.net
    2007-01-17 03:33:10
    Hi Dennis,
    I have had my AS-1 on a counter in a 2nd floor classroom (gain = 25), under
    my desk (gain = 30), on the floor at the side of the classroom next to the
    wall (gain = 40), and currently in the corner behind a display case (gain =
    80). Use whatever it takes so that the background noise is 1-2mm.
    J. Bob

    -----Original Message-----
    From: irised-bounces<at>iris.washington.edu
    [irised-bounces<at>iris.washington.edu] On Behalf Of John or Jan Lahr
    Sent: Tuesday, January 16, 2007 5:48 PM
    To: irised<at>iris.washington.edu
    Subject: Re: [irised] Time is of the essence

    Dennis,

    I think you should be able to run with a gain of 20 or so. The trace
    should always show some vibration.

    John

    At 03:49 PM 1/16/2007, you wrote:
    I just recently received and as1 and was wondering what is the
    optimal gain for the helicorder to where you get earthquakes but not
    as much kid noise. I have mine set to 1 currently but is that
    sensitive enough to pick up events?
    On Jan 16, 2007, at 9:12 AM, Jerry Cook wrote:

    Hi All,
    I am having trouble with my computer clock. Every morning when I
    come in I ping "atomic clock sync" and my clock is off by about 3.5
    minutes. I have the program set to ping automatically but that only
    happens once a day. Is there a way to automatically ping more
    often? Why is my clock so inacurrate?
    J. Bob
    _______________________________________________
    irised mailing list
    <irised<at>iris.washington.edu>irised<at>iris.washington.edu
    http://www.iris.washington.edu/mailman/listinfo/irised

    Dennis Griner
    5th Grade Highland Terrace
    <dennis.griner<at>shorelineschools.org>dennis.griner<at>shorelineschools.o
    rg



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    irised<at>iris.washington.edu
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08:37:14 v.ad6b513c