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RAS-72, 96,120 Specifications

GENERAL
Number of Channels: 72, 96 or 120 Channels per module
Sample Intervals: .125, .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
Multiline Operation: 10 lines
CDP Operation: 2D: Automatic or manual roll of entire spread
3D: Managed by RAS-24 script editor
Stacking: Vertical stack
Cable: Typically existing CDP cables are used with the RAS-120
Recording Format: SEG-2, SEG-D 8038, SEG-D 8058

 

RAS-72,96 120 MODULE
Channels: 72, 96 or 120
A/D Resolution: 24 bits using Delta-Sigma A/D converters - one per channel
Preamp Gain (PG): 12db, 24db, 36db or 48db, remotely selectable
Frequency Response: .125 ms: 2 - 3300Hz, .25 ms: 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: 112db @ 2 ms PG=36db, 117db @ 2 ms PG=12db (typ)
Distortion (THD): .005% at 25 Hz, 2 ms sample interval (typ)
Crosstalk: Greater than 90db
CMR: Greater than 90db @ 60 Hz
Max Input Signal: 880 mVRMS @ 12db, 55 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 3300 Hz
Test Oscillator: 10, 25, 50, 60, 100, 125, 200, 250 Hz
Amplitude adjustable in 10 mV steps
Instrument Tests: Internal digital tests, battery voltage, internal voltage, crosstalk,
amplifier pulse, CMR, amplifier noise, dynamic range, gain &
phase similarity, system timing, communications, trigger verification
Line Tests: Geophone pulse, geophone similarity, geophone resistance, cable leakage
Connectors: Connectors for geophone spread cable are user specified
3-pin Bendix for trigger, two 6-pin Bendix for data,
3-pin Cannon for power
Power: 12 volts nominal. Current: 120 Chs: 7.5A, 96 Chs: 6A, 72 Chs: 3A
Physical: 23” x 22.5” x 10”, 42 lbs
Operating Temp: -30 to 70C


Seistronix reserves the right to change specifications

Phone: 916-851-1890 Fax: 916-851-1852 Email: sales@seistronix.com
 



EX-12 Seismograph

Seistronix introduces the EX-12 exploration seismograph. The EX-12 is a distributed system based on the technology used in the EX-6. With 12 channels per box, the EX-12 reduces the the number of boxes, cables and batteries by half. Read more here



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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