ULTRALOW POWER
24-BIT SEISMIC SEISMIC RECORDER WITH EXTERNAL
EA-120 HIGH RESOLUTION ACCELEROMETER AND INTERNAL SCU

Model DR4050-A-SCU/IF






The eentec DR4050-A-SCU/IF is a rugged, ultra low power, high-performance, versatile 24-bit ADC resolution seismic recorder. It is designed for the most demanding requirements in high performance seismic or strong motion research. It both records seismic events for further analysis and interfaces with a streaming RS-232 interface link to an SCU controller. It includes the high resolution FBA EA-120 accelerometer. The EA-120 is standard external with an optional internal configuration.

This state-of-the art seismic standard recorder features every channel having a high resolution ADC that ensures no channel to channel skew, and a very low-power, high-performance ARM processor that controls the data acquisition, real-time digitization and filtration. The standard unit is suitable for earthquake monitoring and interfacing with an SCU to allow that controller to communicate with other industrial machines.

The powerful, full-featured single-board system is easy to use, install, and maintain. It is lightweight and robust for field deployment. It includes software for seismic waveform analysis and manipulation.

Its full-featured communication capabilities such as Ethernet LAN, VSAT, ADSL, and some radios allows easy configuration for telemetry networks. GSM, GPRS, CDMA, and PSTN communications are also supported. The included GPS can act as a network timeserver for synchronizing other NTPv4 enabled timing critical systems.

Other options include an external battery pack with charger.




FEATURES
  • 24-bit high resolution
  • 121dB dynamic range
  • operates in trigger or continuous mode
  • Excellent communication features
  • Multiple trigger passband pre-filters
  • High accuracy GPS timing
  • Large capacity PC compatible removable flash disk
  • Integrated SCU
  • Triaxial FBA EA-120 high resolution accelerometer
SPECIFICATIONS
INPUT CHANNELS
Type: Differential (external or internal option)
Data Channels: 3 external FBA accelerometers model EA-120
Resolution: 24-bit resolution ADC, low resoultion configuration (121dB)
Gain: Software programmable: 1, 2, 3, 4, 8, 16, 24, 32
Differential Input 20 V
Dynamic Range: (rms to peak): 121 dB @ 50 sps low resolution ADC
Overvoltage Protection: 500W per 10/10000us, steady state power dissipation 5W,surge current up to 40A.
Input Impedance Data inputs 1MOhm
DIGITIZER
Type: 24-bit delta-sigma converter on each channel
Sampling Rates: 16, 20, 40, 50, 80, 100, 200 sps
Digital Filter 130 dB @ 200 sps FIR
Phase Linear within the passband
Processor ARM processor with 8/16 Mb Ram available
Channel to Channel Skew None
TIMING SYSTEM
Type: GPS
Maximum Accuracy : 10 micro seconds
HOW TO ORDER Crystal Oscillator TCXO 1 ppm/year
Basic DR-4050-A-SCU/IF Configuration The standard configuration includes 3 external cahnnels with an EA-120 FBA accelerometer, 1Gb Flash card, GPS antenna/receiver, Lan cable for laptop, and analysis software.
Additional External sensor input

option -EXT

Removable flash card option -xxGb (specify capacity )
Sensor Options EP-300 Broadband,
EP-105 Broadband,
SP-400 Medium Period Seismometer,
R-1 Rotational Seismometer
Supplies and Accessories External Battery pack w/ charger (specify voltage)
General Spares GPS antenna/receiver
Charger
Battery (specify capacity)
Flash Card





S Printer Friendly Format For Specifications

Crystal Frequency Correction Resolution 0.016 ppm
GPS Receiver (integral with antenna): Miniature; external; connects via a std 5m cable
Internal Battery Backup Clock -100 to 10 ppm
TRIGGERING
Type: STA/LTA, Level , phase picking
Recording Triggered or continuous
Pre-event/ Post-even shared buffer 1,000 seconds split anyway between pre-even and post-event
Calibration Internal 5V voltage step, external sensor option sine wave
Calibration Duration User selectable
POWER
Voltage: 9 – 15 Vdc
Overvoltage Protection 15V transzorb for spikes and reverse polarity, 1.8A automatic resettable polyfuse for longer term high voltage
Power Consumption 95mA at 12V
USER INTERFACE
Display Type: LED std
User Control: Menu-driven; state-of-health messaging
Optional VGA data display: Up to 3 channels simultaneously in real time, settings, and SOH
Setup RJ45 plug on the plug panel to connect computer (via x-over cable to PC laptop ) or to an Ethernet network
Main GUI Any common web browser (MS Explorer, Firefox, Safarai)
Console Any common VT100 emulator (Hyper Terminal)
Data Transfer to SCU RS-232 continuous
Data Transfer (remote) Any common FTP client
Data Retrieval (local) Copying removable flash card to PC using a USB reader, via FTP, or copying files from the internal SCU.
MASS STORAGE
Compact flash memory card Removable 1Gb Flash standard, optional 3Gb
Disk/File Compatibility: Any PC
Data Formats: PC-SUDS (other conversions to ASCII, miniSEED available). Internal SCU in miniSEED format
REMOTE COMMUNICATION
Interface Via web browser or Telenet over Ethernet or PPP
Compatibility VSAT links, GSM and CDMA modems, spread spectrum radios links, and others
Data Transfer Using HTTP, FTP or CD1.0 in internal SCU
ENVIRONMENTAL PARAMETERS
Housing Reinforced Plastic
Waterproofing IP67
Operating Temperature -20 to +60°C
Humidity 100% RH
Size 260 x 230 x 130mm
Weight 2Kg
CONNECTORS: REAR PANEL, WATERPROOF
Power 2-pin Circular (bayonet)
External Sensor 16pin Circular (bayonet)
Ethernet RJ-45 10/100Mbit port for connection to PC, LAN, VSAT, Ethernet, radio, etc.
Serial Port DB-25 RS-232 Port for GSM and CDMA modems
GPS 6-pin Circular (bayonet), 5m cable, extensions optional
CONNECTORS INTERNAL
Terminal Interface DB-9 terminal interface mainly for factory use and diagnostics
INTERNAL SCU
Voltage 9 – 15 Vdc
Power Consumption 100mA at 12V
Operating System Window CE or Window XP Embedded
Communication 2 Ethernet with RJ-45 port, 2 standard serial ports
Compact Flash Memory Card Removable 20Gb internal.
Data Conversion Optional PGA and SI calculation
STANDARD EXTERNAL EA-120 FBA ACCELEROMETER
Type: Orthogonally aligned triaxial mounted
Dynamic Range: >135dB
RMS Noise 0.8 micro g
Full Scale +/-2g
Bandwidth DC to 50Hz +1dB /-3dB
Output +/-10V differential
Linearity 0.3% typ, 0.1% optional
Cross Axis Sensitivity 0.02g/g, 0.01 g/g optional
Calibration Fully calibrated
Zero g biasing Electronic (adjustable)
Input protection Protection against lightning and power surges.
Optional internal accelerometer Available, 2 micro g RMS noise, dynamic range >108 dB or 120 dB dynamic range solid state (MEMS)
STANDARD ANALYSIS SOFTWARE
eqWave Waveform analysis and manipulation. Operates under Windows, Unix, Linux, and MacOS
Functions Reads and displays data files, zooming and scaling, bandpass filtering (3 custom bands for quick filtering), and arrival picking.


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