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Entry  Mon Aug 25 15:50:18 2008, rana, Summary, PEM, Ranger SS-1 
    Reply  Tue Dec 2 19:18:10 2008, rana, Summary, PEM, Ranger SS-1 
Message ID: 881     Entry time: Mon Aug 25 15:50:18 2008     Reply to this: 1167
Author: rana 
Type: Summary 
Category: PEM 
Subject: Ranger SS-1 
The manual for the Ranger SS-1 seismometer can be found on line here:
ftp://ftp.kmi.com/pub/software_manuals/300190/300190nc.pdf

and now in our 40m PEM Wiki page:
Ranger_SS-1

To calibrate it, we use the formula from the manual:
                 R_x
G_L = G_0 * ------------   =  149 +/- 3 V/(m/s)
             R_x  +  R_c

where
G_0 = 340 V/(m/s)    (generator constant)
R_x = 4300 Ohms      (external damping resistor in Pomona box)
R_c = 5500 Ohms      (internal coil resistance)

Then we have a gain of 200 in the SR560 so that gets us to ~30000 V/(m/s).

And then there's a DAQ conversion factor of the usual 2^16 cts / 4 V.

so the calibration constant is

G = 488 counts / (micron/sec)

in the ~1-50 Hz band
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