Geospace Technologies GSR Geospace Seismic Recorder (GSR) User Manual Geospace Seismic Recorder GSR

Geospace Technologies Corporation Geospace Seismic Recorder (GSR) Geospace Seismic Recorder GSR

Users Manual Revised

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Document ID994912
Application IDKO5MUqwgpdgWdte5e/anag==
Document DescriptionUsers Manual Revised
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeUser Manual
Display FormatAdobe Acrobat PDF - pdf
Filesize45.04kB (562953 bits)
Date Submitted2008-09-03 00:00:00
Date Available2008-09-05 00:00:00
Creation Date2008-07-31 19:08:28
Producing SoftwareAcrobat Distiller 7.0 (Windows)
Document Lastmod2008-07-31 19:12:18
Document TitleGeospace Seismic Recorder (GSR)
Document CreatorAcrobat PDFMaker 7.0 for Word
Document Author: JERRY PARRISH

Geospace Seismic Recorder (GSR)
USER MANUAL
OYO GEOSPACE
7007 Pinemont
Houston, TX 77040 USA
This device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions: (1) this device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired
operation.
Changes or modifications not expressly approved by Oyo Geospace could void the user’s authority to operate this equipment.
Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own
expense.
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GSR MODULE
Deployment
The GSR should be deployed with the metal plate down. This provides sufficient earth
grounding and maximum cooling of the unit as well as providing the GPS receiver in the top to
the unit with an ideal “view” of the satalite constellation. The seismic sensors should be
deployed and plugged into the seismic input connector prior to connection of the battery. The
seismic input connector is black on the single channel unit and blue on the multiple channel
units. Once the sensors are deployed and attached, connect the battery cable to the red
connector. The GSR will immediately begin a power on self test.
The GSR will test all of its internal circuits followed immediately by an impedance test of the
seismic sensors. The LED that can be seen from the top of the GSR will flash codes to indicate
the GSRs condition. The GSR will then enable the Global Positioning System (GPS) receiver
and begin to flash the code that indicates that it is searching for satalites. Within a few seconds
the GPS receiver will have sufficient satalite information to obtain a 3 dimensional fix. The
flash code will change to indicate this condition and the GSR will now begin to acquire seismic
data if it has been programmed to begin recording immediately. See Programming below.
After several minutes the internal GSR clock will be sufficiently disciplined and the GPS
receiver will be turned off. The flash code will again change to indicate this state. See the flash
codes below.
Radio Status Monitoring
A GSR may be connected to a laptop computer and used as a hub to monitor the status of any
GSRs within a 50m to 100m radius via a high frequency radio link. In this mode the loptop/hub
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monitors and logs status information from all of the GSRs that it communicates with. The
laptop stores the GPS location, acquisition status, temperature, battery status and the nonvolatile memory status of each GSR. By moving the hub throughout the seismic spread all of
the GSRs in the survey may be monitored and logged. This logging may take place during
acquisition of seismic data with no adverse effect on the data quality.
Flash Codes
GSR Start-up Error Codes
Critical GSR Error:
Critical Seis Input 1 Error:
Critical Seis Input 2 Error:
Critical Seis Input 3 Error:
Critical Seis Input 4 Error:
Critical Battery Error:
Non-Volitile Memory Error:
Non-Volitile Memory Full:
LED flashes repeatedly on solid for 1 second followed
by off for one second.
LED on solid for 1 second followed by 1 short pulse.
LED on solid for 1 second followed by 2 short pulses.
LED on solid for 1 second followed by 3 short pulses.
LED on solid for 1 second followed by 4 short pulses.
LED on solid for 1 second followed by 5 short pulses.
LED on solid for 1 second followed by 6 short pulses.
LED on solid for 1 second followed by 7 short pulses.
GSR Run Time Codes
GPS on but no GPS fix:
GPS on with GPS fix:
Recording with GPS off:
Sleeping:
Running geophone tests:
One LED flash per second.
Two quick flashes once per second.
One quick flash each 8 seconds.
Two quick flashes each 10 seconds.
LED flashes on for 10 ms 5 times per second.
Downloading
The GSR non-volatile memory may be read and cleared by removing the battery connection and
inserting the unit into one of the outlets in the GeoReaper. See the GeoReaper User Manual for
further instruction.
Programming
The GSR recording parameters such as sample rate, pre-amp gain, record mode, and testing,
are programmed and stored in non-volatile memory in the GSR by the GeoReaper. See the
GeoReaper User Manual for further instruction.
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GSR User Manual
Scalability greater than 50,000 channels
Delivers high resolution with a 24-bit delta-sigma ADC
Built-in GPS receiver and disciplined clock
Up to 30 days of continuous recording
Compatible with explosive, vibratory and impulsive energy sources
Accepts standard analog sensor inputs
Has a built-in full resolution test generator
Available as 1, 2, 3 or 4 channel versions
Has an LED Status/Deployment State Indicator
RFID for location/inventory assistance
Wireless short range communication for status verification
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Geospace Seismic Recorder (GSR)
Cable-Free
Autonomous Data Recording
The GSR is designed for cable-free/radio-free
seismic data recording. The self-contained unit
includes 1 to 4 channels of 24-bit digitization, an
integrated/high sensitivity GPS receiver, built-in
test signal generator, up to 4 GB per channel of
non-volatile solid-state data storage, and a highspeed data port. The unit is housed in a sealed
case, with input connector, extended life battery
connector/data port connector.
GSR System Tests
The seismic channel performance and sensor tests can be
performed by the GSR System. The user can choose a partial or
Above: GSR Data Recorder.
Below: GSR unit connected to geophone string and battery unit.
Above: GSR Battery Unit
complete set of tests that can be run in sequence. The user can
also choose to display all of the results or only the failures. In the
tests described below, the System Software automatically controls
the Channel Input Switch Positions and Test Oscillator Settings
during the tests. All tests can be run at all sample intervals and
preamp gains of the GSR.
- Harmonic Distortion
- Gain Accuracy
- Impulse Response
- Common Mode Rejection
- Equivalent Input Noise
- Geophone Impedance and THD
- Instantaneous System Dynamic Range
- Crossfeed (multi-channel)
All specifications subject to change without notice
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Geospace Seismic Recorder (GSR)
Features and Specifications
24-bit digital recorder
Built-in GPS and disciplined clock
Built-in full resolution test signal
generator
Solid-state flash memory
Scalability greater than 50,000 channels
Greater than 30 days of continuous
recording
Compatible with vibratory, explosive and
impulsive energy sources.
LED Status/Deployment State Indicator
RFID for location & inventory assistance
Accepts standard analog sensor input
IEEE 802.15.4 wireless status retrieval
Max input signal: 1.80 Vrms @ 0 Gain
Total Dynamic Range: 140 dB
System Dynamic Range @ 0dB Gain:
126 dB @ 4 msec SI
124 dB @ 2 msec SI
120 dB @ 1 msec SI
117 dB @ .5 msec SI
106 dB @ .25 msec SI
Equivalent Input Noise @ 2 msec SI:
1.13 μV @ Gain 0 dB
.58 μV @ Gain 6 dB
.33 μV @ Gain 12 dB
.22 μV @ Gain 18 dB
.19 μV @ Gain 24 dB
.18 μV @ Gain 30 dB
.17μV@Gain36dB
Input Impedance:
20 kohms/0.06 μf Difference Mode
205 kohms Common Mode
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Available as 1,2,3, or 4 channel versions
24-bit delta-sigma ADC
3 Hz to 1600 Hz freq. response
<1 μsec. of UTC (GPS clock)
Up to 4 GBytes per channel flash memory
storage
12 Volt external battery
Operating Temperature: -40° C to +85° C
Humidity: 0 to 100%
Selectable Gains:
- X1, X2, X4, X8, X16, X32, X64
0, 6, 12, 18, 24, 30, 36 dB
Sample Intervals:
- 4, 2, 1, .5, .25 milliseconds
Max Timing Error: 20 μseconds
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System Dynamic Range @ 2 msec SI
124 dB @ Gain 0 dB 123 dB @
Gain 6 dB 122 dB @ Gain 12 dB
120 dB @ Gain 18 dB 115 dB @
Gain 24 dB 110 dB @ Gain 30
dB 105 dB @ Gain 36 dB
Total Harmonic Distortion: 0.0005%
Common Mode Rejection: 0.001%
Gain Accuracy: 1%
Anti Alias Filter:
Rejection @ Nyquist: 130 dB
Frequency @ -3 dB: 0.87 Nyquist
Linear or Minimum Phase
Time Standard: <1 ppm
Weight: 2 pounds
Max. Dimension: 3.5"Wx3.0"Hx6.67"L
For more information: gshields@oyogeospace.com • Tel: 713.986.4444 • Fax: 713.986.4445
All specifications subject to change without notice
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Geospace Seismic Recorder (GSR)
GeoRes-XTC GSR Data Management System
The GeoRes-XTC consists of two embedded software modules:
GeoReaper performs pre-deployment parameter programming, i.e. sample rate, preamp gain, record mode, testing, etc. and data collection via Ethernet connection to the
Data Transfer Module (DTM) and a high speed PC.
GeoMerge allows the system to read and import all three major components of SPS (R,
S and X records). It will merge all GSR data into SEG-D or SEG-2 files according to SPS
X records (Cross-Reference File, sorted in the same order as the Source 'S' File) and
convert all latitude and longitude information into the same coordinates used in the SPS
files. These data are then output to the field database (RAID memory) and/or hard media
(tape, disk, etc.).
The GeoRes-XTC is compatible with third party generated SPS files.
Data Transfer Module (DTM)
GeoRes-XTC High Speed Computer
7007 Pinemont • Houston, Texas, U.S.A. • www.oyogeospace.com
Tel: 713 986-4444 • Fax: 713 986-4445
Regional
Offices
OYO Geospace Canada, Inc.
2735-37 Avenue N.E. Calgary,
Alberta, Canada T1Y 5R8 403
250-9600
GSR User Manual
OYO Geo-Impulse International LLC
Kirovogradskaya, 36 Ufa,
Baskortostan, Russia 450001 011
(7) 3472 25 39 73
OYO Geospace China
Room 700, 7th Floor, Lido Office Tower, Lido Place
Jichang Road, Jiang Tai Road, Beijing, 100004, P.R.China
011 (86) 10 643 78 758
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OYO Instruments, Europe Ltd.
F3 Bramingham Business Park, Enterprise Way, Luton
Bedfordshire LU3 4BU, England
011 44 (0) 1582 573 980
16 June 2008

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