Guralp Systems CMG-3EX-EAM - Manual (Page 10)

CMG-3EX-EAM Digital Broadband Seismometer
4 Data flush control
The CMG-3EX-EAM has an internal ring-buffer for storing seismic
data. If an external storage device is connected and configured for
data storage, the CMG-3EX-EAM will leave it powered down for most
of the time, in order to conserve energy. Periodically, the CMG-3EX-
EAM will power up the external storage device and flush the data from
the ring buffer to it. (To configure an external storage device for use in
this way, see Section 10.2 of MAN-EAM-0001.)
When data need to be retrieved, e.g. at a site visit or at the end of a
deployment, a manual flush to stoarge should be initiaited in order to
ensure that the most recent data are written to the external device.
This process can be initiated using the yellow “flush” button on the
instrument's lid
To start a flush, hold down the yellow flush button then press the
black enable button for approximately 10 seconds. The flush LED
should now illuminate to indicate that the transfer is in progress.
If the LED remains illuminated for only a few seconds, the flush has
failed; the EAM module will retry after 60 seconds (and will retry up to
three times before aborting).
When the flush is complete, the LED will extinguish. It is now safe to
remove the external storage device.
Flushing data using the lid controls it identical to the web 'flush'
command and transfers from flash to external storage all data that have
been recorded since the last transfer was carried out.
10 Issue A