Guralp Systems CMG-1T - Manual (Page 33)

Operator’s Guide CMG-1T Ocean Bottom
Seismometer
September, 1999, Issue C Section 9,
Page 3
Many methods can be used to restrain the movement of the levelling system
within the glass bowl. The preferred method used by us is given in the
following photographs.
A set of attachment points are glued to the inside of the glass sphere from which
semi-flexible linkages are used to attach the bottom of the levelling platform to
the glass sphere. Six separate holes are provided for such linkages.