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  5. GeoSIG - Model VE-5x - Short-Period ...

GeoSIG - Model VE-5x -Short-Period Seismometer

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The VE-5x is a triaxial short period seismometer designed for seismic monitoring applications. The VE-5x seismometer is based on a state of the art geophone mass-spring system with electronic feedback. It is ideally suited for installation in vaults with low to moderate noise. VE-5x offers a remarkable stability under temperature fluctuations or against aging. In addition, due to the innovative design of the unit, no mass locking is required. The VE-5x is housed in a sealed cast aluminium housing. The housing incorporates a single bolt mounting system with three levelling screws. The broaderband version, VE-53-BB, is suitable for applications involving an extended frequency range. Stainless steel or Ex-proof packaging options are also available. The VE-5x seismometer is directly compatible with all GeoSIG solutions.

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  • Sensitivity   1000 V/m/s differential
  • Bandwidth   1.1 s (0.9 Hz) to 89 Hz
                          8.0 s (0.125 Hz) to 160 Hz (BB version)
  • Dynamic Range    > 125 dB (0.9 - 15 Hz)
                                    > 120 dB (0.9 - 30 Hz)
  • Robust mechanical design
  • Excellent temperature and aging stability
  • Low power consumption
  • Easy testing, low maintenance

  • ** H: Horizontal, V: Vertical
  • Sensitivity:1000 V/m/s differential ( 2 x 500 V/m/s )
  • Full Scale Range : 20 mm/s (± 10 mm/s) nominal output

Sensor Element

  • Instrument Type:Over damped geophones
  • Dynamic Range:
    • > 125 dB (1 to 15 Hz)
      > 120 dB (1 to 30 Hz)
  • Linearity:± 0.05 % of full scale maximum
  • Cross Axis Sensitivity:± 1 % typical, ± 3 % maximum
  • Bandwidth:
    • 1 to 80 Hz (-3 dB)
      8.0 s (0.125 Hz) to 160 Hz (BB version)
      flat response within -3 dB crossing points
  • Damping:0.7 critical
  • Full Scale Output:0 ± 10 V differential, optional 0 ± 5 V pseudo-differential
  • Measuring Range (see plot):
    • > M1 (Local - 10 Km) and
      > M1.5 (Regional -100 Km)

Power

  • Power supply voltage:9 to 18 VDC
  • Power Consumption:49 mA typical, 88 mA max @ 15 VDC
  • Overvoltage Protection:All pins are protected

Testing

  • Test input: Activated by applying a 12 VDC voltage  to generate an output of a pulse with an amplitude of 50% of the full scale

Environment/Housing

  • Housing Type: Cast aluminium ,  Sealed access cover,  optional: stainless steel or ex-proof
  • Housing Size:195 x 112 x 95 mm
  • Weight: 2.5 kg
  • Index of Protection: IP 65,  Optional IP 68
  • Temperature Range:
    • -20 to 70 °C (operating)
      -30 to 80 °C (non-operating)
  • Humidity:0 to 100 % (non-condensing)
  • Orientation:
    • Floor mount
      optional Wall mount
      See separate document (GS_Sensor_Orientation)
  • Mounting: Single bolt, surface mount, adjustable within ± 10°



Standard VE-5x

  • Floor mounted, 2 m cable with cable inlet and concrete anchor, includes recorder mating connector if delivered with a GeoSIG recorder.

Ordering Information

  • Please specify applicable options

**Specifications subject to change without notice