Guralp Systems CMG-3ESPCD User Manual
Page 20
CMG-3ESPCD Digital Broadband Seismometer
Installing the 3ESPCD
12. Group the cables coming from the bag for a distance of about 1 m, and
keep them together with insulating tape.
13. Tie the top of the package and fold it over so that water cannot get in.
Leave any excess cable within the bag.
14. Cover the installation with soil or sand until it is no longer visible.
15. Attach a GPS unit to the cable coming from the sensor. Seal the
connection between the data cable and the GPS unit's IEEE 1394 cable
inside a plastic bag to protect it from moisture.
16. Position the GPS unit so that it has a good view of the sky. Bury the
cable and connector package so that they cannot be seen.
17. If possible, place the GPS near the instrument so that it can be found
more easily, and the connector package near the GPS so you can
retrieve data from the instrument without affecting the installation.
18. If you are using a battery as a power source, dig a second hole for it.
This hole does not need to be as deep as the pit for the instrument—
perhaps 10 cm plus the height of the battery.
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Issue B - November 2013