Looking for a quick way
to find depth to bedrock? Want to determine the shear-wave velocity
(Vs) for IBC Vs30 site classification?
Need an economically-priced integrated instrument? Look no further!
If you are a
geoscientist doing teaching or research, or need a basic exploration
seismograph to find bedrock or determine IBC
Vs30 site class, the next generation SmartSeis ST is for you. The
SmartSeis ST is an integrated seismic exploration system with a
built-in ruggedized PC, daylight-visible
LCD, keypad, and high-resolution plotter.
Use the plotter to print and show your client or students results
right in the field.
The SmartSeis ST
system comes standard with the data analysis software you need to do
comprehensive refraction surveys. As an option, you can add the
capability to analyze surface wave data to determine Vs. Geometrics
also offers special pricing for multiple licenses of data analysis
software so field crews or students can have their own copies.
The SmartSeis ST is
backed by Geometrics, now in our 40th year of prompt and
knowledgeable customer support. Our seismographs and the SeisImager
suite of software are also available for rent.
Specifications:
Configurations: 12, 16, or 24 channels configured as an
integrated unit in weather-resistant container with built-in
LCD, keypad, and ruggedized PC running
Windows XP Home. System includes SmartSeis ST Operating Software (STOS)
with optional software for self-triggering and continuous recording.
A/D
Conversion: 24-bit result using Crystal Semiconductor
sigma-delta converters and Geometrics proprietary over-sampling.
Dynamic
Range: 144 dB (system); 110 dB (instantaneous, measured) at
2 ms, 24 dB.
Bandwidth:
1.75 Hz to 8 kHz.
Distortion:
0.005% @ 2 ms, 1.75 to 208 Hz.
Common Mode
Rejection: >100dB at ≤ 100 Hz, 36 dB.
Crosstalk:-125
dB at 23.5 Hz, 24 dB, 2 ms.
Noise Floor:
0.20 uV, RFI at 2 ms, 36 dB, 1.75 to 208
Hz.
Maximum Input
Signal: 177 mV P-P, 24 dB.
Input
Impedance: 20 kOhm, 0.02 uf.
Stacking
Trigger Accuracy: 1/32 of selected sample interval.
Preamplifier
Gains: 24 or 36 dB, software-selectable.
Anti-alias
Filters: down 3 dB at 83% of Nyquist frequency; down 90 dB
or more ≥ Nyquist frequency.
Acquisition
and Display (Butterworth) Filters:
Low Cut: OUT, 10, 15, 25, 35, 50, 70, 100,
140, 200, 280, 400 Hz, 24 or 48 dB/octave.
Notch: OUT, 50, 60, 150, 180 Hz, with the
50 dB rejection bandwidth 2% of center frequency.
High Cut: OUT, 32, 64, 125, 250, 500, 1000
Hz, 24 or 48 dB/octave.
Display filter values are user-selectable with 24 or 48 dB/octave
slopes.
Sample
Intervals: 0.0625, 0.125, 0.25, 0.5, 1.0, 2.0 ms.
Record
Lengths: 4,096 samples standard; 16,384 samples and 65,536
samples optional. Record length of 16,384 samples comes standard
with purchase of SeisImager/SW or SurfSeis surface wave data
analysis software.
Pre-trigger
Data: Up to full record length.
Trigger Delay:
0 to 9,999 ms in 1 sample interval steps.
Triggering:
Positive, negative, or contact closure, software adjustable
threshold.
Auxiliary
Channels: All channels may be programmed as either
AUX or DATA.
Line Testing:
Real-time waterfall noise monitor displays output from geophones.
Data Format:
SEG-2 standard.
Data Storage:
Internal 40 GB hard drive.
Display:
Daylight-visible 800×600 color LCD.
Plotter:
Built-in 4-inch (10.3-cm) wide thermal printer.
Ports:
Three USB, one video, one RS-232; one 61-pin
Bendix connector for geophone input, one 3-socket Bendix connector
for trigger, one 3-socket Cannon connector for power.
Power:
Requires 12V external battery. Draws 26 W plus 0.65 W per channel
during acquisition.
Environmental:
Boots from 0 to 50 degrees C. Operates from -10 to 50 degrees C.
Watertight when closed. Passes MIL810E/F
vibration test.
Physical:
10.5" × 18" × 14" high (26 cm x 46 cm x 36 cm high). Weighs 25 lb
(11.4 kg).
System
Software: STOS includes a full
complement of acquisition, filtering, display, and storage features.
Other options available for self-triggering and continuous recording.
Bundled
Applications Software:
-
SIPQC refraction analysis software (delay-time
method) from Rimrock Geophysics; runs on seismograph.
- SeisImager/2D
Lite refraction modeling and analysis software (time-term least
squares, delay-time, and tomographic inversion methods) from
OYO; runs separately.
Upgrades of
SeisImager/2D Lite and SeisImager/SW or SurfSeis surface wave data
analysis software available separately; please contact the factory
with your requirements.
