StrataVisor NZ

Exploration Seismograph & Geode Module Controller

Brochure (PDF)

StrataVisor NZ - Exploration Seismograph & Geode Module Controller

• Professional, ruggedized 24 bit seismic recorder suitable for reflection, refraction downhole, VSP or marine surveys, vibration and earthquake monitoring

• Crafted for rugged field use: reliable in harsh environments, survives shock, humidity and dust daylight visible color screen. Portable; system operates from 12V power

• Doubles as controller for Geode

• in-field modules to build up to 240 channel distributed systems with roll capability and aux

• Houses from 0 to 48 channels internally: easily connects to other StrataVisor NZ seismographs to build systems up to 480 channels

• Many quality control features: built-in geophone and line testing, full waveform noise monitor; optional automated internal in-field testing or use lab quality external test oscillator system

• 20 kHz real bandwidth (0.02 ms to 16 ms sampling) allows ultra-high resolution engineering surveys or low frequencies for earthquake monitoring

• High-speed hardware correlator means no delays using Vibroseis or pseudo-random Mini-Sosie sources

• Bundled professional software gives quick answers: Built-in first break picker and layer assignment. Industry-standard refraction analysis (SIPQC). New refraction tomography (Optim). Reflection processing (WinSeis-Lite)

The StrataVisor NZ console includes a brilliant daylight-visible color screen, waterproof keypad and built-in printer. The NZs single or dual Pentium processors running under Windows NT, allow simultaneous data collection and processing to give you answers in the field - fast.

Need more channels? Connect to other StrataVisor NZs and build systems up to 480 channels, all controlled from one keypad. Or use 3 to 24 channel external Geode modules to build a flexible distributed system. Geodes eliminate cumbersome roll boxes that make high-resolution reflection and refraction surveys difficult to undertake. We bundle industry-standard reflection and refraction PC based software with every StrataVisor NZ, at no additional charge. This adds up to a system that is unparalleled in flexibility for all seismic surveys. And the StrataVisor NZ is backed by a 1 year parts and labour warranty.

Configurations:

• Stand-Alone: 3 to 48 channels in rugged, weatherproof chassis.

• Multiple System: Two or more NZ chassis connected together to build an integrated system up to 480 channels.

• Semi-Distributed: Connect external GEODE 3-24 channel modules that can be deployed on the ground near the geophgeode.htmones. Geodes are connected to NZ console by standard network cable.

• A/D Conversion: 24 bit result using Crystal Semiconductor sigma-delta converters and oversampling.

• Dynamic Range: 144 dB system, 105 dB (instantaneous, measured) at 2 ms, 0 dB.

• Distortion: 0.002% @ 2 ms, 0.3 to 417 Hz.

• Bandwidth: 1.75 Hz to 20 kHz. Low corner frequency option available.

• Common Mode Rejection: > -110 dB at <= 100 Hz, 48 dB.

• Crosstalk: -120 dB at 100 Hz, 0 dB.

• Noise Floor: 0.23 uV, RFI at 2 ms, 36 dB, 0.3 to 417 Hz.

• Stacking Trigger Accuracy: 1/32 of sample interval.

• Maximum Input Signal: 2.8V PP.

• Input Impedance: 20 kOhm, 0.02 uf.

• Preamplifier Gains: Software selectable between 24 and 36 dB, or 12 and 36 dB. Can be jumpered to 0 dB for AUX channels.

• Anti-alias Filters: -3 dB at 83% of Nyquist frequency, down 90 dB at Nyquist.

• VibroSeis and MiniSosie: High-speed hardware correlator operates either before or after stack for swept or pseudo-random source applications. Correlation time is independent of the number of channels.

• Auxiliary Channels: Channels can be programmed as either AUX or DATA.

• Line Testing: Real time full waveform noise monitor, geophone pulse test. Noise monitor helps locate shorts, discontinuities in line.

Acquisition and Display Filters:

• Low Cut: OUT, 10, 15,25,35,50,70,100,140,200,280,400 Hz, 24 or 48 db/octave, Butterworth.

• Notch: 50,60,150,180 Hz and OUT, with the 50 dB rejection bandwidth 2% of center frequency.

• High Cut: OUT, 250, 500 or I 000 Hz, 24 or 48 dB/ octave.

• Sample Interval: 0.02,0.3125, 0.0625,0.125,0.25,0.5,1.0,2.0, 4.0, 8.0, 16.0 ms.

• Record Length: 16,000 samples standard, 64,000 samples optional, independent of number of channels.

• Pre-trigger Data: Up to 4,096 Samples.

Instrument Tests:

• In-Field: Optional internal oscillator measures full suite of daily and monthly tests.

• Laboratory: Optional, factory verifiable, external high-quality oscillator measures dynamic range, cross talk, common mode, amplitude and phase similarity, filter tests and timing accuracy to factory specifications.

• Data Formats: SEG-2, SEG-D, SEG-Y.

• System Software: Full compliment of display, plotting, filtering and storage options are standard. Operates under Windows NT.

• Data Storage: Operates with DAT, DLT, 3480, 3490, 3590, optical and hard disk storage through SCSI interface. Contact the factory for user specified media.

• Plotters: Includes built-in 4 inch thermal printer. Drives a variety of NT compatible printers including Printrex 4, 8 and 12 inch plotters. Consult factory.

• Triggering: Positive, negative or contact closure, software adjustable threshold.

• Delay: 0 to 9999 ms in 1 ms steps.

• Power: Draws 40W plus 0.65 watts/channel at 12V. Standby mode reduces power used by A/D circuitry by 700/o.

• Environmental: Boots from +5 to 40 degrees C. Operates from -5 to 35 degrees C.

• Operating System: Windows NT.

• Data Processing and Interpretation: Includes software for refraction (SIPQC), reflection (WinSeis Lite), velocity determination (Optim) as well as built in filtering and QC functions. Consult factory for other data processing options.

Ordering Information

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