Guralp Systems CMG-40TDE - Manual (Page 4)

CMG-40TDE
The CMG-40TDE has a rugged, waterproof stainless steel design for
ease of installation. The lightweight sensor elements are designed so
that no mechanical clamping is required. Because of this, the 40T is
ready to record ground movements as soon as you provide it with
power. In addition, the sensor does not have to be levelled or centred
as long as the base is within 3 ° of horizontal. For the best results,
however, you should install where possible on a hard, near-horizontal
surface well coupled to the bedrock.
The CMG-40TDE consists of three internal modules, the 40T sensor, an
integrated digitiser and an integrated data acquisition system
4 Issue A