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Broadband Seismometer (Trillium 240)
 

 
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Trillium 240

 

Trillium 240은 예외적으로 매우 넓은 광대역과 낮은 잡음의 지진계로써 휴대와 고정 네트웤 애플리케이션에 이상적인 제품이다.

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