Made of rigid plastic and lined with insulating foam, the insulating cover is a rugged, form-
fitting cover that creates a close fit around a Trillium Compact without touching any part of
the seismometer or the cable. When fitted over a Trillium Compact, the cover creates a small
air gap between itself and the seismometer. This gap reduces the potential for noise by
preventing the cover or other objects from exerting force on the seismometer; by minimizing
the amount of air trapped under the cover, thereby eliminating convection; and by providing a
cable channel that reduces heat conduction through the cable.
Figure 3-3 -
Trillium Compact insulating cover features and dimensions
3.9.2 Installing a Trillium Compact Vault in the Insulating Cover
The contents of this section are applicable to Trillium Compact, model numbers TC120-
SV1, TC20-SV1.
Chapter 3 - Installing a Trillium Compact Vault Seismometer
16889R10 • 2020-11-12
Page 43
