EDAS-24GP
Small-flow Earthquake Data Acquisition Server
EDAS-24GP small flow seismic data collector is widely used in seismic Observation, reservoir dam structure monitoring, flow observation, scientific array, reservoir induction For seismic research, mine seismic monitoring and urban active fault detection,Mobile seismic observation is more widely used because of its small size and portability.
OVERVIEW
Description
The EDAS-24GP is a high-resolution, wide dynamic range seismic data acquisition system designed for portable seismic data recording in earthquake observation stations, early warning facilities, and integrated seismic monitoring networks. Available in two configurations based on analog input channels: the three-channel model features 3 high-speed and 3 low-speed analog signal inputs, supporting connection to a triaxial seismometer with dedicated low-speed analog channels for zero-point calibration, while the six-channel version provides 6 highspeed and 6 low-speed channels to simultaneously interface with two triaxial seismometers. The device employs dual SD card storage for enhanced data reliability and supports hot-swappable SD cards for seamless data transfer.
The EDAS-24GP seismic data collector delivers lowlatency real-time data streams, supports largecale data storage and backup capabilities, and provides multi-user real-time data services. Featuring compact design, lightweight construction, and energy-efficient operation, it achieves comprehensive compatibility with instruments ranging from broadband seismometers and short-period seismometers to strong-motion accelerometers, fully meeting diverse seismic observation requirements.
Technical Parameter
Number of data acquisition channels:
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3 or 6 high-speed acquisition channels
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3 or 6 slow acquisition channels
High-speed data acquisition channel:
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Input signal full value: ±2.5V, ±5V, ±10V or ±20V, balanced differential input
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Input impedance: 100KΩ (single side)
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A/D conversion: 24 bits
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Dynamic range: >138dB, 0~20Hz
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System noise: less than 1LSB (effective value), sampling rate of 50Hz
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Nonlinear distortion: <-110dB @ 50Hz sampling rate
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Crosstalk/passband fluctuation: <-110dB / 0.1dB
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Out-of-band attenuation: >135dB
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Digital filter: FIR digital filter, which can be set for linear phase shift and minimum phase shift
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Output sampling rate: 1, 10, 20, 50, 100, 200, 500Hz
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Multiple sampling rate output: each channel supports multiple sampling rate data output at the same time
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Minimum output interval of real-time data: 10 sampling points/bag (low-latency real-time data is provided for earthquake early warning service)
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Analog signal generator: 16-bit DAC, programmed waveform output, ±20mA, ±10V
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Signal types: square wave, sine wave, pseudo-random binary code; signal frequency, amplitude and period can be set
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Local record format: optional compression format, support SEED format
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Recording function: support continuous data and trigger event data recording at the same time
Slow acquisition channel:
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Input signal full value: ±10V, double-ended balanced differential input
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Input impedance: 1MΩ (single side)
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A/D conversion: 24 bits
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Noise (RMS): <1LSB, sampling rate is 1Hz
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Real-time data output interval: 1 second
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Local record format: compressed format
Time service:
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Timing accuracy: when the GNSS module is synchronized, the clock accuracy is less than 10 microseconds
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Timing accuracy: when the GNSS module is not synchronized, the clock drift is less than 1ms/day
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Input time: IRIG-B code time signal
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Attachment GNSS module: output IRIG-B code time signal
Sensor control:
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Communication interface: 10M/100M Ethernet port
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Communication protocol: support TCP/IP, FTP, Telnet, HTTP and so on
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Parameter setting: client software or IE browser parameter setting
Reliability:
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Self-starting function: self-test, automatic reset, restart, remote control and upgrade function
Take Notes:
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Recording capacity and media: industrial TF card (standard 8G, expandable), 32G industrial SD card
Operational parameter:
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Working temperature: -30℃ ~ +60℃
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Power supply: DC 9~18V, standard 12V
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Average power consumption: <2W (three channels, display off, GNSS intermittent work)
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Shape size: 256mm × 171mm × 68mm
Accessories:
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GNSS module: output IRIG-B code time signal
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Stable power supply: +12V@3A














