Guralp Systems ART - Manual (Page 11)

User guide
COILCONST=0.02575,0.01778,0.01774
CALVPC=3.161
CALRES=51000
TYPE=CMG-3T
RESPONSE=CMG-3_30S_50HZ V
GRAVITY=9.80122
CMG-5TD accelerometers use 1 Ω calibration resistors, and
their coil constant is set to unity. Older CMG-5TD instruments,
based on Mk2 digitizer hardware, do not have calibration input
facilities, and thus the CALVPC entry is omitted. For example:
[GURALP-CMG5]
Serial-Nos=T5585
VPC=2.013,2.028,2.036
G=0.256,0.255,0.255
COILCONST=1,1,1
CALRES=1
TYPE=CMG-5T
RESPONSE=CMG-5_100HZ A
GRAVITY=9.81089
2.3 Starting ART
ART can be started in two ways, either from SCREAM or by
double clicking on the ART icon.
2.3.1 Start from the ART icon
Double-clicking on the ART icon will start the application and
cause the main ART window to open.
Clicking on the ‘Import data’ button at the top of the left-hand
column of the main ART window opens up a file selection
window from which a GCF time-history can be selected to
import and analyze.
2.3.2 Starting from SCREAM
Within Scream!, open a WaveView window displaying the event
you are interested in. Click on the Pause icon
to stop the
traces moving then, using the mouse, select the parts of the
time-histories that you want to analyze while holding down
either the Ctrl or Shift keys.
If you use the Ctrl key, the first and last streams in the selected
area will be analyzed. This is useful for picking two streams
from many for comparison. If you use the Shift key, a
contiguous set of streams are selected.
May 2009 11