Trillium 240 Broadband Seismometer

The Trillium 240 is one of the highest performing weak motion seismometers in the world. An exceptional very broadband low noise seismometer, the Trillium 240 is 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.

Seismology Trillium 240 Broadband Seismometer

 

  • Very broadband performance from a portable, low power seismometer

  • Integrated web browser interface replaces requirement for a separate breakout box

  • Factory calibration values exist on the seismometer, easily accessible via web browser interface

  • Extremely low power consumption, advantageous for remote installations

  • Switchable XYZ/UVW outputs provide independent calibration of sensor elements and electronics

  • The advanced thermal design reduces the effects of significant temperature fluctuations: minimizing the requirements for external thermal insulation.

TECHNOLOGY

  

Topology:
Feedback:
Mass Centering:
Leveling:
Alignment:

Symmetric tri-axial
Force balance with capacitive displacement transducer
Automatic mechanical re-centering can be remotely initiated 
Integrated bubble level, adjusted locking leveling feet
Vertical scribe marks for E/W, precision holes for 5/16" alignment rod for N/S

PERFORMANCE

  

Noise:
Passband:
Clip level:
  Temperature:
Velocity:

 Below the NLNM from 100 seconds to 10 Hz 
Flat to velocity from 240 seconds to 35 Hz
> 15 mm/s up to 1.5 Hz 
±10°C without re-centering
1200 V*s/m standard velocity

ANALOG INTERFACE

  

Velocity Output:
Mass Position:
Mass Centering:
Calibration:

40 V peak-to-peak differential, selectable XYZ or UVW mode
Three independent voltage outputs
Single 5 V active-high control
Single voltage input with one active high control signal per channel; remote calibration in XYZ or UVW

DIGITAL INTERFACE

  

Type:
With Access To:

Serial RS-232 compatible interface for state-of-health, command and control
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:
Power Consumption:
Protection:

9-36 VDC
650 mW typical at 15 VDC input
Reverse voltage protected
Auto-resettable over-current protection
No fuse design

PHYSICAL

  

Connector:
Diameter:
Height:


Weight:
Parasitic Resonance:

19 pin MIL-C-26482, mounted on base
25 cm
26.5 cm without leveling feet
28.6 cm with leveling feet at minimum extension
29.5 cm with leveling feet at maximum extension
14 kg
None below 150 Hz

ENVIRONMENTAL

  

Operating Temperature:
Humidity:
Shock:

-20°C to +50°C
0-100%
20 g half sine, 5 ms without damage, 6 axis
No mass lock required for transport

Seismology noise