The Trillium 240 is an exceptional very broadband low noise seismometer ideally suited to portable and fixed network applications. Trillium 240 has a response flat to velocity from 240 seconds to 35 Hz and a self-noise below the NLNM from 100 seconds to 10 Hz.
The benefits:
- Very broadband performance from a portable low power seismometer
- Web browser interface replaces breakout box
- Factory calibration stored on seismometer, accessible via browser interface
- Extremely low power consumption, advantageous for remote installations
- Switchable XYZ/UVW output to provide independent calibration of sensor elements and electronics
- Thermal design optimized for temperature-insensitivity allows external thermal insulation requirements to be reduced
The Trillium 240 is an advanced force feedback seismometer with a velocity response flat from 240 seconds to 35 Hz. Self-noise is below the NLNM from 100 seconds to 10 Hz, allowing the instrument to take advantage of quiet sites, recording more of the earthquake spectra at longer periods.
The Trillium 240 is simple to deploy and operate. Nanometrics' field proven mass suspension system means there is no mass lock to forget when shipping. Once onsite, an integrated bubble level and truly accessible leveling feet allow for quick deployment in vault or post hole installations.
One-touch mass centering ensures the masses are centered the first time, every time, with no possibility of the mechanism sticking or jamming. Mass position outputs and a mass centering control line are accessible via the single seismometer connector mounted on the base of the unit.
Trillium 240 Specifications
| TECHNOLOGY | | | Topology | Symmetric triaxial | | Feedback | Force balance with capacitive displacement transducer | | Mass centering | Automatic mechanical re-centering can be remotely initiated | | Leveling | Integrated bubble level, adjusted locking leveling feet | | Alignment | Vertical scribe marks for E/W, precision holes for 5/16" alignment
rod for N/S | | | | | PERFORMANCE | | | Noise | Below the NLNM from 100 seconds to 10 Hz | | Passband | Flat to velocity from 240 seconds to 35 Hz | | Clip level | > 15 mm/s up to 1.5 Hz | | Temperature | ±10°C without re-centering | | Velocity | 1200 V*s/m standard velocity | | | | | ANALOG INTERFACE | | | Velocity output | 40 V peak-to-peak differential, selectable XYZ or
UVW mode | | Mass position | Three independent voltage outputs | | Mass centering | Single 5 V active-high control | | Calibration | Single voltage input with one active high control signal
per channel; remote calibration in XYZ or UVW | | | | | DIGITAL INTERFACE | | | Type | Serial RS-232 compatible interface for
state-of-health, command and control | | Access to | Mass position display
Mass centering command
UVW/XYZ mode command
Long/short period mode command
Temperature: current, min/max since reset
Stepper motor position: current, min/max since reset
Factory calibration data
Instrument ID information | | | | | POWER | | | Supply voltage | 9-36 VDC | | Power Consumption | 650 mW typical at 15 VDC input | | Protection | Reverse voltage protected
Auto-resettable over-current protection
Fuseless design | | | | | PHYSICAL | | | Connector | 19 pin MIL-C-26482, mounted on base | | Diameter | 25 cm | | Height | 26.5 cm without leveling feet
28.6 cm with leveling feet at minimum extension
29.5 cm with leveling feet at maximum extension | | Weight | 14 kg | | Parasitic resonance | None below 150 Hz | | | | | ENVIRONMENTAL | | | Operating Temperature | -20°C to +50°C | | Humidity | 0-100% | | Shock | 20 g half sine, 5 ms without damage, 6 axis
No mass lock required for transport |
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Last Updated on Friday, 13 June 2008 08:32 |
Trillium 240 Datasheet
