Trillium Compact Broadband Seismometer


Seismology Trillium Compact SeismometerThe 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 20 second Hydra Fracking, Frac'ing, Frac, Seismology

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 deploymentsvery 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 120 s 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 < 160 mW typical
Protection Reverse-voltage and over-voltage protected Self-resetting over-current protection