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Entry  Thu Jul 29 12:09:56 2010, Alastair, Laser, GYRO, Seismometer Measurements Continued 10_07_29_seismic01.pdf
    Reply  Fri Jul 30 00:48:11 2010, Dmass, Laser, GYRO, Seismometer Measurements Continued 
Message ID: 880     Entry time: Fri Jul 30 00:48:11 2010     In reply to: 876
Author: Dmass 
Type: Laser 
Category: GYRO 
Subject: Seismometer Measurements Continued 


I've added SR560s to all three channels of the seismometer now.  They're DC coupled with a gain of 100, low pass filter at 10k and I'm running them on battery to avoid grounding the seismometer outputs.  The manual says that the battery should last 20hours so we might need to use a different solution to get more data (I'm assuming we don't want to use the mini circuits bnc transformers for this since it's not RF?).

We are now well above the DAQ noise.  Here is a plot showing 10 averages of the vertical, N/S and E/W data plotted calibrated in volts (GPS 964463447).  We will now take seismic data for 24hours.  Setup completed at 11.40am July29.


The bottom 560 was making a bunch of clicking noises and had flashing red lights on the overload and battery indicators. I have turned it off.

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