Borehole Digitizer Model SMART-24B
Portable Recorder Model SMART-24R®
Strong
Motion Recorder Model SMART-24A®
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Download the datasheet in PDF format
TECHNICAL SPECIFICATIONS
DATA ACQUISITION
| Number of inputs Input type Input range Gain Common mode rejection A/D Converter Anti-alias filter Dynamic range Intermodulation distortion Signal to distortion Sample rates Noise |
- 3 or 6 channels - Balanced differential with transient protection suitable for both passive and active sensors - 40, 20 and 5 volts p-p bipolar differential maximum - Software selectable gains of 1, 2, 4, 8, 16, 32 and 64 - Greater than 90 dB - Over sampled 24-bit Delta Sigma ADC with DSP, 1 per channel - Brickwall digital FIR filter, cutoff at 80% of and 130 dB down at output Nyquist - up to 138 dB - Less than -100 dB - Less than -100 dB - 1, 5, 10, 20, 40, 50, 100, 125, 200, 250, 500, 1000 and 2000 sps primary sample rates (plus secondary) - < 1 count rms at 100 sps |
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ACQUISITION MODES (SMART-24R® & SMART-24A® ONLY)
| Continuous Timed Triggered |
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User selected start time, ring buffer or until disk full - 16 user programmable windows - Theshold, STA/LTA (updating and non-updating LTA, and external (pre-event up to 32768 samples, post-event up to remaining data storage |
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DATA STORAGE (SMART-24R® & SMART-24A® ONLY)
| Type Recording format |
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Up to 240 GB hard disk, PCMCIA ATA hard
disk, up to 64 GB Compact Flash, IBM microdrives - Standard file system, drives readable directly on a PC, SMART24Reader standard for quick waveform view and simple file conversions. SMARTOffline software for automated conversion into 32-bit SUDS, SAC, SEG-Y, SEISAN, MatLab, miniSEED, CSS, and SEED |
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TIMING
| Type Accuracy Stability (unlocked) GPS duty cycle |
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Voltage controlled TCXO with external GPS synchronization
- <±10 microseconds of UTC with GPS lock - 0.5 PPM (when unlocked) - User programmable GPS power on/off cycle times to conserve power from continuous to 2^32 seconds in 1 second increments |
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INTERFACES
| Indicators Communications GPS Power Analog input Other I/O Telemetry |
- Large LCD display, with real-time
waveform and GPS signal strength display - RS-232, Ethernet, USB2.0 - Internal dual PCMCIA controler and interfaces - Dedicated RS-422 serial port GPS interface - Main power input and external battery inputs - Up to 6 sensor input channels (24-bit) - 5 or 8 12-bit auxiliary analog inputs, external trigger in/out, 1 PPS in/out, calibration outputs for pulse, sine wave, pseudo-random wide band noise, and step signals - CD1.1 protocol (TCP/IP based) over Ethernet or serial ports (PPP) and/or Earthworm protocol |
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GENERAL
| Firmware Field upgrades Setup Utility software Diagnostics Power consumption |
- Real-time multi-tasking operating system
that allows simultaneous recording and data retrieval
- FLASH memory and boot loader allow for local or remote upgrades of the system firmware (both CPU and DSP code) and FPGA hardware configuration - User can setup and operate the unit locally or remotely - SMART24Config Java written setup, control, and real-time data display utility software provided. SMART24Reader for quick view and simple conversions provided. SEEDLINK and EarthWorm connectivity! - ftp server and webserver running on all SMART-24 units - Hardware diagnostics and state-of-health information provided - ~1 W for 3 channels @ 100 sps (SMART-24D®) |
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PHYSICAL
| Construction Size Weight (SMART-24D) Operating temperature Humidity |
- Portable rugged shielded molded case
- 4.1 in (105 mm) w x 10.35 in (263 mm) l x 13.65 in (347 mm)h - 8.5 lbs (3.9 kg) - -20 ºC to +70 ºC for basic electronics package; PCMCIA PC Card or hard disk options may limit this range - 0 to 100% (IP67) |
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