GeoSIG's latest offering in central data acquisition systems is fora, our most advanced multichannel central monitoring and recording system. fora — part of the CR series — is a 19" rack module with Slot-in Modules (SiMs) inserted into vertical slots, and it features an extremely flexible 24 Bit (or optionally 36 Bit) multichannel recorder. It has up to 36 channels, and by combining several fora systems, hundreds of channels can be monitored. Data from acceleration, velocity, displacement, strain, meteorological or any other type of sensors can be monitored and recorded with superior data quality.

There is true simultaneous sampling with the shared clock for up to 36 channels, and fora's capable of communication via Ethernet TCP/IP, internal landline modem*, external GMS modem*, external satellite modem*, external GPRS modem*, or external UMTS/3G modem*.
Its modular architecture and industry standard interfaces offer high versatility, easy expansion, upgradeability and long-term availability of spare parts. Its design is based on years of experience in creating solutions for earthquake, seismic, structural, dynamic and static monitoring. 
User-configurable periodical sensor test and periodical state of health (SOH) report based on comprehensive test of the instrument, which can be requested at any time, offers assurance of system reliability.

Its various applications include:

• Structural Health and Response Monitoring
• Earthquake and Seismic Monitoring
• Ambient Vibration Testing
• Induced Vibration Monitoring and Notification
• Building Code-Compliant Instrumentation
• Seismic Alarm and Safe Shutdown

GeoDAS, a proven data acquisition and evaluation package developed by GeoSIG, complements fora, providing a highly flexible user-friendly capabilities, and graphical, analytical and reporting tools with automation.

• Overview

• fora is a 19" rack module consisting of Slot-in Modules (SiMs) inserted into vertical slots.
• Each fora rack is expandable up to 36 channels —and by combining several fora systems, hundreds of channels can be monitored.
• System parameters of the fora are stored in the non-volatile system memory to allow automatic recovery.

• Sensors

• The fora offers the most flexible sensor connectivity options to cater for the needs of any measuring requirement. Any type of sensor complying with the fora signal input specifications can be connected on the conveniently available screw terminals.

• fora rack

• Configuration:
• Base SiM modules:
  - fora-SBC data handling SiM
  - fora-OVP over voltage protection SiM
  - fora-POWER system power mgmt SiM
  Channel SiM modules:
  - fora-DSP Digital signal processing SiM
  - fora-ADC analog-to-digital SiM
  - fora-OVPS sensor interface SiM
• Channels
• up to 36 channels

• Digitizer SiM

• Configuration:
• fora-DSP + fora-ADC
  Mounted at the front of the fora rack
  up to 12 SiMs per one rack
• Channels:
• 3 channels per SiM
• A/D Converter:
• 24 Bit (or 32 bit) D-S per channel
  with analog and digital FIR anti-aliasing filters
• Dynamic range:
• 146 dB (per bin @ 1 Hz rel. full scale rms)
  137 dB @ 50 sps
  156 dB (per bin @ 1 Hz rel. full scale rms)*
  150 dB @ 40 sps*
• Sampling Rate:
• Up to 2000 (or 5000) sps
• Bandwidth:
• DC to 1000 Hz standard / Others*.

• Sensor Interface SiM

• Configuration:
• fora-OVPS
  Mounted at the back of the fora rack
  up to 12 SiMs per one rack
• Channels:
• 3 channels per SiM
• Input Signal:
• 20 VDC or 10 VDC differential
  2.5 VDC ± 2.5 VDC single ended
  0 - 20 mA current loop
• Sensor Power:
• same as DC Power
  15 or 24* VDC (specify at order)

• Data Recording

• Type:
• Continuous and/or event based

• Triggering

• Type:
• Level or STA/LTA trigger
• Pre-event Time:
• 1 to 720 seconds, typical
• Post-event Time:
• 1 to 7200 seconds, typical
• Trigger filtering:
• User configurable lowpass, highpass or bandpass

• Data Stream

• Protocol:
• GSBU, SeedLink (Earthworm compatible)

• Storage memory

• Size and Type:
• Internal 64 GB built in SSD hard drive
  Higher capacity available on request
  Removable SD card or USB storage on request FAT32 or EXT4 formatted.
• Management:
• Intelligent management of memory card
  capacity using policies as per file type and
  ring buffer capacity specification.
• Recording format:
• miniSEED, or with extended information
  encapsulated into blockette 2000*.

• Power

• DC Power:
• 9 - 36 VDC
• AC Power:
• Available on request, AC/DC adaptor with 230 VAC / 50 Hz or 115 VAC / 60 Hz.
• Consumption:
• typically 15 W with 36 channels excluding the consumption of the connected sensors
• Solar Panels:
• Available on request
• External Battery:
• Available on request, 24 to 100 Ah with battery protection in case of low battery
  condition with automatic restart after power is restored.

• Self-Test

• User-configurable periodical sensor test and periodical state of health (SOH) report based on comprehensive test of instrument, which can be
  requested at any time. Sinewave, triangular wave or square wave calibration signal are supported.

• Time Base

• Internal:
• Intelligent Adaptive Real Time Clock (IARTC)
• External:
• NTP or GNSS
• Std. TCXO accuracy:
• ±0.5 ppm (15 s/year) @ +25 °C
  ±2.5 ppm (75 s/year) @ -10 to +50 °C
  Higher accuracy available on request
• Accuracy after learn:
• < ± 0.5 ppm (15 s/year or 2 ms/h)


• Accuracy with NTP:
• < ± 4 ms typical, assuming reasonable
  access to NTP servers

• Communication Channel

•  
• Ethernet TCP/IP
  Internal landline modem*
  External GSM modem*
  External Satellite modem*
  External GPRS modem*
  External UMTS/3G modem*

• User Interface

• An intuitive web interface is available for easy configuration with any web browser. Alternatively the configuration file in XML format can be
  edited on site through the instrument console, exchanged by replacing the memory card, remotely from a server or through SSH. Although the
  configuration file can be manually edited at any time, a tool is provided to edit it securely.
• Network based link allows the user optionally to interact with the unit over the Internet, from anywhere around the world.

• Alarm (SiM*)

• Alarms:
• 4 or 8 independent relay contacts for trigger alarm and/or error (NO and NC contacts available)
• Relay Hold-on:
• 1 to 60 seconds (User programmable)
• Contacts:
• Suitable for a low voltage control. In case large loads must be switched,
  then external relays should be implemented.
• Max voltage:
• 125 V / 250 mA

• Environment / Housing

• Operational temperature:
• -20 °C to +70 °C
• Storage temperature:
• -40 °C to +85 °C
• Humidity:
• 0 % to 100 % (non-condensing)
• Rack Dimensions:
• 19’’ rack, 3 HU, 350 mm depth
• Housing:
• Various fixed or portable housings available on request
• Protection:
• Housings with variable protection available on request

























 
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• *Optional
  **Specifications subject to change without notice

• Unlimited number of channels by combining 36 channel modules
• Dynamic range - 137 dB, 150 dB*
• Individual D-S ADC per channel - 24-bit, 32-bit*
• Adjustable sampling rates up to 2000 sps, 5000 sps*
• True simultaneous sampling with shared clock for up to 36 channels
• Internal Fast SSD hard drive up to 1TB with SATA interface and high storage capacity. Mirroring function on SD card* or USB drive*
• Built-in display for easy inspection of status and parameters
• Support for interconnection of multiple devices
• Support for DVI output for direct graphical visualization of data and configuration*
• USB interface for external, removable storage media and communication devices
• Continuous and trigger-based recording
• Simultaneous data streaming to several clients
• Wired Ethernet; enhanced connectivity via external landline modems*, 3G cellular devices*, satellite links* and serial links*
• TCXO time base with GNSS (GPS, GLONASS, BEIDOU) or NTP synchronisation
• Configuration and status monitoring via Web Interface compatible with Smartphones/Tablets
• Simple and secure communication over internet or intranet with full remote management
• 3 option slots for adding peripherals
• Alarm output* with up to 8 independent relays flexibly configurable for different types of events (through 2x4 alarm option boards)
• Power redundancy through dedicated battery input (internal battery charger included)
• Extremely compact and modular with higher channel density than ever

Download: Data sheet

User Manual