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22-bit
Digital Seismic Recorder
Model
DAS-6102-x
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The DAS-6102 is a portable, rugged, ultra low power, high-performance,
versatile 22-bit resolution digital seismic recording system
The standard system is configured for 4-channels. Optional configurations
include configurations up to 32 channels. All channels operate synchronously
up to 2,000 samples per second.
A standard 20Gb removable hard disk is included, with optional disk
capacities to to 32Gb. Data is retrieved by removal of the PC compatible
compact hard drive, or through dial up telephone access (internal
modem optional), or via LAN (Ethernet card optional).
The DAS-6102 includes a GPS receiver and antenna and "Smart Timing"
software, allowing the user to select the timing accuracy, which will
automatically control and minimize the GPS cycling times. The integrated
display and keyboard allows for easy setup in the field and real time
viewing of up to 3 waveforms.
For large permanent installations, the DAS product line includes
multi-channel PC based or rack mounted systems up to 32 channels (Models
DAS-6102-PC or -I)
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FEATURES
- 22-bit high resolution
- 112B dynamic range
- operates in both trigger and continuous mode
- Multiple trigger passband pre-filters
- High accuracy GPS timing
- Large PC compatible removable hard disk
- Integrated display
- Integrated keypad
- Real time waveform display
- 4 to 32 channels
- Analog and digital alias filtering
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SPECIFICATIONS |
| INPUT CHANNELS |
| Type: |
Differential or Single-Ended |
| Data Channels: |
3 + 1; optional up to 32 channels.
Fourth channel is used as state-of-health channel. |
| State-of-Health 4th Channel: |
Standard: 22-bit resolution, optional
external connector |
| Gain: |
Software programmable: 1,2,4,8 |
| Single Ended Input
Range, |
Software programmable:
±2.5 Optional Differential Input |
| Dynamic Range: |
>112 dB @ 200 sps
(rms to full scale) |
| Analog Anti-Aliasing Filter: |
>90 dB @ primary sampling rate
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| Input Impedance |
Data inputs: ±2.5V - 1Mohm |
| Overvoltage Protection |
±40 V |
| DIGITIZER |
| Type: |
22-bit delta-sigma converter in
each channel (570 kHz) |
| Sampling Rates: |
1, 10, 20, 40, 80, 100, 200, 500,
1000, 2000 sps |
| Digital Filter |
Built-in DSP-based
digital filter |
| Phase |
Linear within the passband |
| TIMING SYSTEM |
| Type: |
True Real Time PLL controlled,
GPS-referenced |
| Maximum Accuracy : |
<1msec, (Software Selectable) |
| HOW
TO ORDER |
Crystal Oscillator |
Standard: 25ppm; Optional TCXO
1 ppm/year |
| Basic DAS-6102 Configuration |
The standard configuration
includes 3 channels with internal 1 (mux) channel for state of health
monitoring/recording, 10Gb hard drive, single ended sensor input,
and GPS antenna/receiver. |
| Channel Configuration |
option -8CH, -12CH, -16CH, -20CH, -24CH, -32CH
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| 4th Channel External Connector (Aux) |
option -AX |
| Differential Sensor Input Configuration |
option -DI |
| Full VGA Display |
option -FD |
| Full PC Keyboard (miniature) |
option -KB |
| Microsoft Windows O/S |
option -MSW (requires option -FD and
-KB) |
| Removable 12Gb, 20Gb, or 30Gb Drives |
option -xxGb (specify capacity, must
turn power off to remove) |
| Internal Modem |
option -56IM |
| LAN option |
option -LAN |
| 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
PC removable disk frame
Hard Disk (specify capacity) |
| General Spares |
GPS antenna/receiver
Keypad
Set of spare boards
Charger
Battery (specify capacity) |
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S Printer
Friendly Format For Specifications
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GPS Duty Cycle : |
Once every 18 hrs
to achieve <1msec accuracy, (Software Selectable) |
| EVENT DETECTORS |
| Type: |
STA/LTA, Level, up to 5 independent
detectors in frequency domain |
| Trigger Pre-filter |
Up to 5 trigger passbands |
| Pre-event data buffer |
Up to 90 seconds (@100
sps) |
| Post-event buffer |
User configured - no limitations |
| Trigger channels |
May be controlled by one, several
or all 5 detectors associated with any physical or virtual acquisition channel |
| Calibration |
5V square wave (others optional) |
| Calibration Duration |
User selectable |
| POWER |
| Voltage: |
7 - 16 Vdc |
| Overvoltage protection: |
±60 V |
| Power consumption |
4 ch ~5W, 100sps,
(Display off, PC and GPS cycled) |
| USER INTERFACE |
| Display Type: |
Backlit 320x200 graphic LCD display,
opt. TFT color 640x480 (1/4) VGA |
| Keypad: |
12 (numerical + function) keys |
| Full PC keyboard |
Optional |
| User Control: |
Menu-driven; state-of-health messaging |
| Data display: |
Up to 3 channels simultaneously
in real time |
| Remote PC: |
RS232 com2 port |
| MASS STORAGE |
| Hard Disk |
10Gb standard, optional
to 32Gb |
| Disk/File Compatibility: |
Any PC |
| Temperature Range: |
-10 to +50°C (built-in automatic
heater for optional hard disk) |
| Data Formats: |
Mini-SEED w/Steim-2 compression
up to x6 CSS 3.0: long integer; separate data description in ASCII |
| COMMUNICATION |
| Dial-up Telephone Line
Access |
RS232 com2 port; optional
internal modem; Automatic PC dial up communication software included |
| Ethernet |
Optional LAN card |
| ENVIRONMENTAL PARAMETERS |
| Housing |
Reinforced plastic |
| Waterproofing |
Submersible to 1m depth |
| Operating Temperature
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-10 to +50°C |
| Humidity |
100% RH |
| Size |
L12"xW10"xD6" |
| Weight |
9.5lb typ (4 ch w/ sensor) |
| CONNECTORS: REAR PANEL, WATERPROOF |
| Power |
2-pin Circular (MS) |
| Data |
10-pin Circular (MS) |
| LAN or serial port |
10-pin Circular (MS), or DB9 |
| GPS |
6-pin Circular (MS) |
| CONNECTORS: MAIN PANEL |
| To PC Keyboard |
PS/2 Mini-DIN |
| To external PC |
RS232 (DB9) |
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Specifications Subject
to Change Without Notice |
| ©eentec 2000, 2003,2007 |
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