Trillium Compact User Guide
16889R5
2014-03-04
2
Chapter 1
Getting Started
1.1 About Trillium Compact Seismometers
Trillium Compact is extremely simple to deploy with no mass lock and no mass centering
required. The exceptionally small size significantly reduces the time and effort required for
site preparation and installation. Continuous quality data are available within minutes of
deployment with no requirement for further intervention.
All Trillium Compact seismometers are observatory-class three-component, very
broadband, low-noise seismometers with extended low frequency range useful out to
beyond 1000 s, low noise, and a high clip level that is ideal for teleseismic, regional, and
local studies.
•
Low-noise broadband seismometer performance
•
Broadband performance, 20 or 120 second to 100 Hz, with improved noise floor at
high frequency
•
Exceptionally high clip level of 26 mm/s permits on scale recording of larger events
closer to the source
•
Ultra low power consumption of just 160 mW for low operating costs and higher
station reliability
•
Ease of deployment through no mass lock, no mass centering and wide tilt range
•
Integrated web server for efficient instrument management
Trillium Compact seismometers are available with 20 s or 120 s low corner period. The 20 s
variants have a wide operational tilt range of ±10° and are suitable for downhole
installations where the seismometer cannot be levelled, or for rapid deployments where a
quick settling time is needed. The 120 s variants have lower long-period noise and a
narrower tilt range of ±2.5° and are suitable for installations where the seismometer can be
manually levelled or placed on a level surface (in a vault or at the bottom of a suitably
prepared borehole).
Featuring low sensitivity to both tilt and temperature, Trillium Compact seismometers do not
require mass centring under normal operation. With the wide tilt range, levelling is simple
and If additional levelling is required, the seismometer can be levelled in seconds by
seating it in its optional levelling cradle, which corrects an uneven installation surface by
Appendix C “Levelling Cradle and Spike Kit”
for more information.
The Trillium Compact has an integrated Web server that is accessible using a standard Web
browser and the RS-232 serial interface available on the connector. A desktop computer
with a serial port configured with serial-over-Internet-Protocol (SLIP) can be used to browse
into the Trillium Compact and configure optional features, check factory information or
state-of-health, and update firmware. Current generation Nanometrics digitizers support
this interface so users can access the Web-based features of the Trillium Compact
remotely, even with the unit in service.
