GA-88C System Engineering Seismograph
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Description
Seismograph
GA-88C is a product of E-PULSE series seismic node instrument, which is lightweight, convenient and stable. The product aims to reduce the difficulty of seismic exploration construction, improve construction efficiency and save operating costs, and create greater value for users while maintaining high quality geological data collection. Using advanced GPS/ Beidou synchronization algorithm, ultra-low power circuit design and wireless data download/charging technology, the product is fully integrated, built-in high sensitivity detector, built-in lithium battery, continuous working time, the whole body is contact-free, conducive to intelligent/automated construction, unlimited collection number expansion, very suitable for a variety of complex surface and hostile environment.
Ø light weight：580g
Ø Small size ：55mm x 55mm x 145mm
Ø Wireless charging/wireless data download without any connector
Ø Ultra-low power consumption, battery life of 50 days (@ 12 hours a day continuous collection)
Ø Efficient and automatic deployment of mobile apps
Ø Intelligent start/sleep construction is simple
Ø intelligent coordinate matching, support no pile construction
Ø also supports GPS/ Beidou positioning system
Ø mobile phone Bluetooth quality control
| Physical index | ||
| Argument | Index | |
| Weight | 580g | |
| Dimension | 55mm×55mm×148mm | |
| Operating temperature | -40℃ to +70℃ | |
| Class of protection | IP68 | |
| Endurance @25℃ | 25 days @2ms or 50 consecutive days (12 hours work &12 hours sleep) | |
| Charging time | 3.5 hours | |
| Instrument index | ||
| Argument | Index | |
| Number of channels | 1 | |
| Sampling rate | 0.25ms,0.5ms,1ms,2ms,4ms | |
| Advance gain | 0-24dB(6dB step) | |
| Low cut filter | 1Hz, off DC or off | |
| Anti-aliasing filter | 206.5Hz@2ms(82.6% Nyquist frequency) Maximum or minimum phase optional | |
| The maximum value is @0dB | 2.5VpeaK | |
| Equivalent input noise | 0.16μV@2ms @12dB | |
| Instantaneous dynamic range | 128.8dB@2ms @12dB | |
| Overall dynamic range | 150dB | |
| Time accuracy | ±10μs | |
| Built-in GPS | GPS and Beidou (receive simultaneously) are used for timing and positioning | |
| Internal storage | Expandable from 8GB to 32GB | |
| Geophone index | ||
| Argument | Index | Index |
| Optional detector | 5Hz | 10Hz |
| Natural Frequency (Hz) | 5±7.5% | 10±3.5% |
| Dc resistance (Ω) | 1850±5% | 1800±3.5％ |
| Sensitivity (V/m/s) | 80±5％ | 85.8±3.5％ |
| damping | 0.6±7.5％ | 0.48～0.54 |
| distortion | ≦0.1％ | ≦0.1％ |
| False frequency (Hz) | ≧170 | ≧240 |
