GeoSIG ela - GMS series

Click here for the ela - GMS series response files in the IRIS NRL library

ela is the state-of-the-art accelerograph designed for large scale deployment for indoor and outdoor installations. It is a pedigree of GeoSIG's flagship GMS series of recorders with more than 10 years of proven field test for reliability and high performance.

Its compact and robust purpose-built design allows ela to be used as part of a large deployment for EEW. It can stream real-time data and record with multiple filtering options and embedded adjustable triggering algorithms, making it an asset in damage estimation and disaster management.

ela is a cost-effective solution, yet still effective for many sensitive applications where flexibility in data manipulation is a serious demand.

State-of-health data can be transmitted at user configurable intervals to a data centre for management and maintenance purposes. ela's many customisable features and its attractive price point — without sacrificing reliability or quality — make it ideal for large scale deployment. ela is fully compatible with existing GeoSIG sensors and can co-exist and co-perform in the same network as the GMS series recorders.

• GENERAL

• ela monitors ground motion in three orthogonal axes. It is a compact and robust instrument, designed for large scale deployment for
  indoor and outdoor installation.

• Accelerometer

• Type:
• Triaxial MEMS
• Full Scale
• ± 4 g (others available*)
• Dynamic Range:
• > 80 dB over 0-40 Hz Bandwidth
• Linearity:
• < 0.5 % typical
• Cross-axis:
• < 2 % typical
• Measurement error:
• < 1 % typical

• Recording

• Features:
• Low noise 24 bit ΣΔ, 32 bit output word length
• Sampling rate:
• up to 2000 SPS
• Anti-aliasing filter:
• Attenuation > 100 dB,
  Pass band ripple < 0.5 dB
• Memory:
• Internal flash memory with up to 100 days re-cording capacity in miniSEED
  files, where a quota can be flexibly configured.
• Method:
• Continuous data recording in to ring buffer files, or event recording in event,
  files. Event and ring buffer files can be uploaded automatically to data server.

• Triggering

• Multiple Trigger Sets can be defined in the instrument. Each set can be flexibly configured regarding the source of trigger, main and advanced trigger
  parameters, trigger processing and selected channels for storage. A voting logic based on the monitored channels can be defined.

• Trigger Filter

• Fully independent high-, low- or bandpass trigger filters can be configured, with flexible configuration of multiple triggers.

• STA / LTA Triggering

• User adjustable STA/LTA trigger and de-trigger ratio.

• Event Summary and Parameters

• PGA, PGV, PGD, as well as Intensity estimation according to GB/T17742 China Intensity Scale

• Data Stream

• Real-time waveform data streaming via seedlink, others* available 

• TIME BASE

• Internal:
• NTP, RTC, GNSS* (GPS, BeiDou, GLONASS) receiver 
• External:
• Antenna for satellite signal
• Clock accuracy:
• 60 ns with GNSS

• Self-Test

• - Permanent self monitoring of hardware and software components without affecting their normal operation.


• - User-configurable periodical state of health (SOH) report based on comprehensive test of instrument, which can be requested at any time.
   
• - User-configurable periodical sensor test.
   

• Connectivity

• Configuration:
• Ethernet TCP/IP with remote configuration
  SFTP remote access to the files
• Supports:
• Earthquake Intensity Meter protocol (China)

• Console Connector

• Accesses serial console for configuration and settings parameters at a Baud rate 115'200 bps.

• Alarm / Relay Output Connector*

• Two solid state relay contacts, which can be activated upon triggered event or error with a maximum contact rating
  60 V / 100 mA and one input acknowledge input galvanically isolated.

• Environment / Reliability

• Operational temperature:
• -20 to +70 °C
• Storage temperature:
• -40 to +85 °C
• Humidity:
• 0 to 100 % RH (non-condensing)
• Ingress protection:
• IP65
• MTBF:
• > 500’000 hours

• Indicators

• 5 LED indicators on the front panel

• Power Supply

• Input voltage:
• 9 - 48 VDC
• Power over Ethernet (PoE):
• 48 VDC
• Power consumption:
• < 2 W

• Mounting

• The instrument can be mounted on the floor or wall. The 1 g gravity is automatically compensated.

• Housing

• Type:
• Aluminium housing
• Size:
• 185 x 145 x 35 mm (W x D x H)
• Weight:
• 2.4 kg

• GMSplus series are produced in different types to suit particular specifications or regulations. Specifications mentioned here may be different among different types.
  
  *   : Optional
  ** : Specifications subject to change without notice