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EX-12 Seismograph Specifications
| GENERAL |
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Number of Channels:
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12 to
3,200. Can handle up to 600 channels per line in
real-time at 2ms sample rate. |
| Controller: |
Ethernet equipped laptop running Windows Vista/XP |
|
Sample Intervals: |
0.125, 0.25, .5, 1, 2
and 4 ms |
|
Record Length: |
4 ms - 64 sec, 2 ms - 32 sec, 1 ms - 16 sec,
.5 ms - 8 sec,.25 ms - 4 sec, .125 ms - 2 sec |
| Noise
Monitor: |
Real-time, viewable between
stacks. |
|
Multiline Operation: |
3,200
channels on up to 32 lines |
|
CDP Operation: |
Automatic
or manual roll in single line operation, spread controlled by scripts
in multiline operation. |
|
Stacking: |
Positive
or negative vertical stack with unstack/restack |
|
Cable: |
8 pair, 12 takeout
reversible cable |
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Max Box Interval: |
1450ft |
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Max Line Interval: |
1450ft,
2,900 feet with one repeater |
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Recording Format: |
SEG-2, SEG-D 8038, SEG-D 8058 |
| EX-12
ACQUISITION UNIT |
| Channels: |
12 |
|
A/D Resolution: |
24 bits |
| Preamp
Gain (PG): |
12db,
24db, 36db or 48db, remotely selectable |
| Frequency Response: |
.125ms: 2 - 3200 Hz, .25ms: 2 - 1650 Hz, .5 ms: 2 - 825 Hz, 1
ms: 2 - 412 Hz,
2 ms: 2 - 206 Hz, 4 ms: 2 - 103 Hz |
| Dynamic
Range: |
120db @ 2ms
PG=12b, 118db @ 2ms PG=24db (typ) |
| Distortion (THD): |
less
than .002%
at 25Hz, 2ms (typ) |
| Crosstalk:
|
Greater
than 90db |
| CMR: |
Greater than 100db @ 60 Hz |
| Max Input
Signal: |
1.6 VRMS @
12db, 100 mVRMS @ 36db |
| Input Noise: |
.21 mVRMS @ 2ms PG=36db, 1.6 mVRMS @ 2ms
PG=12db (typ) |
| Anti-Alias
Filters: |
4 ms 103
Hz, 2 ms 206 Hz, 1 ms 412 Hz, .5 ms 825 Hz,.25ms 1650 Hz .125ms 3300Hz |
| Test Oscillator: |
10, 25, 50, 60, 100, 125, 200, 250 Hz or variable in 1Hz
increments. Amplitude adjustable in 10 uV steps |
| Instrument
Tests: |
Internal
digital tests, battery voltage, internal voltage check,
crosstalk, amplifier pulse, timing verification, CMR, amplifier noise, dynamic range,
gain &
phase similarity, communications, and trigger
verification |
| Spread
Tests: |
Geophone pulse, geophone similarity,
geophone resistance, cable leakage |
| Connectors:
|
Two 16-pin connectors for line In/Out
One 8-pin connector for external battery power
One 3-pin connector for Trigger input |
| Status LEDs: |
Two status LEDs
indicate the state of the connection to the
adjacent box and flash when data and commands are received. |
| Power: |
12
volt nominal, 90ma standby, 320ma idle, 750ma active |
| Physical: |
12.5"
x 9.5" x 2.6", 4.7, 6 lbs |
| Operating
Temp: |
-40°C to
70°C |
| EX-12 LTU |
| Boxes: |
Supports up to 640 channels on either side of
the LTU |
| Physical: |
10.1" x 6.4" x
2.6", 6lbs |
| Operating Temp: |
-40 to 70°C |
| Power: |
12V nominal, current:
100ma |
Seistronix reserves the right to change specifications
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Continuous Recording
The EX-6 now supports continuous real-time recording
for applications such as tomography and seismic interferometry. Read
more here. Mesa Scrip Support
The EX-6 now supports the use of Mesa script files for controlling the
operation of the EX-6 in 3D surveys. Read more here.
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