The Trillium Compact combines the superior performance of a broadband seismometer with the installation convenience of a rugged geophone. Measuring only 5.04 inches in height and requiring no mass lock or mass centering, the Trillium Compact is easily deployed and minimizes site preparation and associated costs. Trillium Compact is available in several variants to facilitate vault, surface or buried downhole deployments. TRILLIUM COMPACT 120S: The 120s instrument incorporates a symmetric triaxial force feedback sensor design with a response flat to velocity from 120 seconds to 100Hz.
TRILLIUM COMPACT 20S: The 20s instrument features the same force feedback sensor design with a response flat to velocity from 20 seconds to 100Hz. The 20s instrument features an industry-leading tilt tolerance of 10 degrees, making deployments very fast and efficient in various surface conditions. Several base foot options are available for different terrains.
TRILLIUM COMPACT POSTHOLE: Available in both 20s and 120s variants, the Compact Posthole features a stainless steel enclosure and waterproof connector ideally suited for downhole deployments of 30 metres or more.
- Low-noise broadband seismometer performance with physical dimensions comparable to geophones
- 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
TECHNOLOGY
| Topology | Symmetric triaxial |
| Feedback | Force balance with capacitive transducer |
| Mass Centering | Not required |
| Leveling | Integral spirit level |
| Alignment | Vertical scribe marks for N and S, holes for 5/16" alignment, rod for E and W |
PERFORMANCE
| Self-noise | See graph |
| Sensitivity | 750 V*s/m ± 0.5% precision (120s Variant) |
| Off-axis Sensitivity | ± 0.5% |
| Bandwidth | -3db points at 20s and 100 Hz or 120s and 100 Hz |
| Transfer Function | Lower corner poles within ±0.5% of nominal provided
High-frequency poles within ±5% of nominal provided No peak in response at high frequency |
| Clip Level | 26 mm/s from 0.1 Hz to 10 Hz |
| Operational Tilt Range | ±2.5° |
| Parasitic Resonances | None below 200 Hz |
INTERFACE
| Connector | 14-pin, shell size 12, MIL-C-26482 Series I, top mounted |
| Velocity Output | 40 V peak-to-peak differential Selectable XYZ or UVW mode |
| Mass Position Output | Single voltage output representing max mass position 3-channel mass positions available through serial port |
| Calibration Input | Single voltage input and one active high control signal to enable all 3 channels.
Remote calibration in XYZ or UVW mode Independent channel selection by serial port |
DIGITAL COMMAND AND CONTROL INTERFACE
| Digital Interface | RS-232 compatible serial IP (SLIP) Onboard web server standard HTTP |
| Digital Commands | XYZ, UVW mode switching
Calibration channel selection (off, enable all, u, v, or w) Short/long period mode Firmware updates State-of-health request |
| Digital Data Outputs | Independent mass position values
Instrument temperature Factory sensitivity User calibration data (poles and zeros) Instrument serial number and firmware revision |
POWER
| Supply Voltage | 9-36 V DC isolated input |
| Power Consumption | 180 mW typical |
| Protection | Reverse-voltage and over-voltage protected Self-resetting over-current protection |
Specifications subject to change without notice
