Nanometrics

Broadband Seismic Sensor Workshop

24 March 2004

Neil Spriggs

Nanometrics

Trillium 40 broadband seismometer

First seismometer development at Nanometrics

Designed for local and regional studies

Balance between spec/time to market, revenue for seismometer unit

Specifications

40 seconds to 50 Hz

Power consumption <0.5 watts

Simple design with no mass lock

Wide operating temperature range with electronic mass centering

Trillium 40

Nanometrics

Very simple to manufacture Symmetric triaxial design, identical axis Single circuit board, surface mount Automatic test software, axis and boards are manufactured independently and are interchangeable

Trillium 40

Nanometrics

Nanometrics Trillium 40

Coherence data,STS-2 vs. Trillium 40Data from Universityof St Louis

Blue CMG-40T self noiseYellow Trillium 40 self noiseRed CMG-3T self noiseGreen STS-2 self noise

Data from IRIS comparison tests

Nanometrics

Trillium 120 broadband seismometer Response, 120 seconds to 50 Hz

Mechanical mass centering using stepper motor

Low power consumption, < 1watt

No mass lock, same mass support system as Trillium 40

Onboard web server with serial interface

Factory calibration data in XML

Center masses using a laptop and browser

Review temperature and power SOH using a browser

Symmetric triaxial design for ease of manufacture

New Developments

Nanometrics

Trillium 120 seismometer and Taurus hand held data Acquisition system

Nanometrics

Thank you.

Nanometrics Incwww.nanometrics .ca