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ULTRALOW
POWER
24-BIT SEISMIC DUAL
RESOLUTION DATA RECORDER
Model DR4050-A |
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The eentec DR4050-A is a rugged, ultra low power, high-performance,
versatile 24-bit and 18-bit resolution seismic recorder. It is designed
for the most demanding requirements in high performance seismic
or strong motion research. Generally for structural monitoring only
the 18-bit (low resolution 24-bit ADC) with standard internal accelerometer
unit is required. The standard unit is also available with an external
sensor input only.
This state-of-the art seismic standard recorder features an internal
triaxial accelerometer. Options include a higher dynamic range internal
accelerometer with 24-bit resolution or an external 24-bit triaxial
sensor input with or without an internal standard accelerometer.
Each channel has a high resolution ADC that ensures no channel to
channel skew in any configuration, and a very low-power, high-performance
DSP that controls the data acquisition, real-time digitization and
filtration. The standard unit is suitable for building and structural
monitoring (optional internal high-resolution accelerometer available).
The optional external 3-channel sensor input can be ordered without
the internal accelerometer and be used with a broadband seismometer
(EP or SP series), rotational seismometer (R-1), or additional accelerometers
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 waveform analysis and manipulation.
Its full-featured communication capabilities such as 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 time server for synchronizing
other NTPv4 enabled timing critical systems.
Other options include a LCD display, modem, and external battery
pack with charger.
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FEATURES
- 24-bit high resolution
- 135dB dynamic range or 118dB
- 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
- Optional Integrated display
- 3 internal channels, optional 3 external channels
- Digital alias filtering
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SPECIFICATIONS |
| INPUT CHANNELS |
| Type: |
Differential (external or internal
option), Single ended Internal accelerometer standard |
| Data Channels: |
3 internal accelerometer
and optional 3 external channels |
| Resolution: |
24-bit resolution with high resolution
ADC, 18-bit with low resolution ADC (simultaneously depending on configuration) |
| Gain: |
Software programmable: 1, 2,
3, 4, 8, 16, 24, 32 |
| Single Ended Input
Range, opt. Differential Input |
±20 V |
| Dynamic Range: (rms
to peak): |
135 dB @ 50 sps high
resolution ADC
118 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
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| DIGITIZER |
| Type: |
24-bit delta-sigma converter
on each channel |
| Sampling Rates: |
16, 20, 40, 50, 80, 100, 200
sps |
Digital Filter
Internal |
130 dB @ 200 sps,
the low and high pass filtering with IIR, Sinc, or FIR (std) digital filters.
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
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10 micro seconds
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| HOW
TO ORDER |
Crystal Oscillator |
TCXO 1 ppm/year |
| Basic DR-4050-A Configuration |
The standard configuration
includes 3 internal channels, internal accelerometer, 1Gb Flash
card, GPS antenna/receiver, Lan cable for laptop, and analysis software.
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| High resolution internal
accelerometer |
option -HAC |
| External sensor input |
option -EXT |
| LCD Display |
option -LCD |
| 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)
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| General Spares |
GPS antenna/receiver
Set of spare boards
Charger
Battery (specify capacity) |
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S Printer
Friendly Format For Specifications
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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
with Internal Accelerometer |
95mA at 12V |
| USER INTERFACE |
| Display Type: |
LED std, optional
LCD |
| 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 (remote) |
Any common FTP client |
| Data Retrieval (local) |
Copying removable flash card
to PC using a USB reader, or via FTP |
| MASS STORAGE |
| Compact flash memory
card |
Removable 1Gb Flash
standard, optional 3Gb |
| Disk/File Compatibility: |
Any PC |
| Data Formats: |
PC-SUDS |
| 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 or FTP |
| ENVIRONMENTAL PARAMETERS |
| Housing |
Reinforced Plastic |
| Waterproofing |
IP67 |
| Operating Temperature
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-20 to +60°C |
| Humidity |
100% RH |
| Size |
260 x 230 x 130mm |
| Weight |
2Kg |
| CONNECTORS: REAR PANEL, WATERPROOF |
| Power |
2-pin Circular (bayonet) |
| Optional 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 |
| Telephone |
RJ-11 for V.92 modem to telephone
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| GPS |
6-pin Circular (bayonet), 5m
cable, extensions optional |
| CONNECTORS INTERNAL |
| Terminal Interface |
DB-9 terminal interface mainly
for factory use and diagnostics |
| STANDARD INTERNAL
ACCELEROMETER |
| Type: |
Orthogonally aligned triaxial
mounted |
| Dynamic Range: |
>100dB |
| RMS Noise |
15 micro g |
| Full Scale |
+/-2g |
| Bandwidth |
DC to 400Hz +/-3dB |
| Sensitivity |
2,000 mV/g |
| Linearity |
0.3% typ |
| Cross Axis Sensitivity |
0.02g/g |
| Calibration |
Fully calibrated |
| Optional internal accelerometer |
Available, 2 micro g RMS noise,
dynamic range >120 dB |
| 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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Specifications Subject
to Change Without Notice |
| ©eentec 2000, 2003, 2007 |
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