Guralp Systems CMG-EDU - Manual (Page 8)

CMG-EDU
2.1.3 Other considerations
•
The sensor and cables should be situated well away from other
electical cables and appliances. Stray radiation from these
sources may interfere with the sensor's electronics.
•
The sensor should be placed on a smooth, level surface free
from cracks. Small cracks tend to open and close slightly with
changes in humidity and temperature, causing the surface to
move slightly.
•
All three of the sensor's metal feet must make good contact with
the floor.
•
The signal cable from the sensor should rest loosely on the
ground nearby, so that vibrations are not transmitted along it.
•
If your recording or digitizing equipment has front-panel
indicators or connectors, make sure it can be reached without
disturbing the sensor.
•
The GPS unit needs to be in a location where it can see as many
satellites as possible. A location with a good view of the sky,
preferably down to the horizon, is recommended. If you are in
the Northern Hemisphere, make sure as much of the southern
sky as possible is visible. Conversely, in the Southern
Hemisphere, make sure the GPS can see a large area of sky to
the north.
The GPS unit is supplied with a 15 m cable to the digitizer.
8 Issue A