Guralp Systems CMG-40T - Manual (Page 18)

CMG-40T
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.
18 Issue A