Nanometrics TC120-PH1, User Manual

Page: 33 / 90

Chapter 3

Performing a Surface Vault Installation
Trillium Compact User Guide
16889R5

2014-03-04
24
5. Optionally, place the lid on top of the insulating cover and secure it with the latches
(see Figure 3-4 “Cut-away illustration of a Trillium Compact in the insulating cover” on
page 24). If you choose not to attach the lid to the top of the cover, retain the lid for
future deployments and transport.
6. Hold the insulating cover above the sensor, aligning the cable slot with the cable (see
Figure 3-4 “Cut-away illustration of a Trillium Compact in the insulating cover” on
page 24). Ensure that the insulating cover is centred on the centreline of the Trillium
Compact
7. Gradually lower the insulating cover over the Trillium Compact, ensuring that the
insulating cover does not touch the seismometer.
If you are using the optional levelling cradle (see Section C.1 “Using the Levelling
Cradle” on page 74), the inside of the foam will fit snugly with the legs of the levelling
cradle.
8. Place a brick or other heavy object on top of the insulating cover to compress the
foam gasket on the bottom of the insulating cover.
Figure 3-4 Cut-away illustration of a Trillium Compact in the insulating cover
Ensuring the cover does not touch the seismometer is important for keeping the seismometer
level and aligned.
The seismometer in Figure 3-4 illustrates model numbers TC120-SV1 and TC20-SV1, but it is also
applicable to model numbers TC120-PH1 and TC20-PH1 (stainless steel enclosure).