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EDAS-24HR
Universal Earthquake Data Acquisition Server
EDAS-24HR universal seismic data collector can be widely used in seismic observation Seismic monitoring, reservoir dam structure monitoring, flow observation, scientific array Reservoir-induced earthquake research, mine earthquake monitoring and urban active fault detection.
OVERVIEW
Description
The EDAS-24HR is a high-resolution, wide dynamic range seismic data acquisition system with low-latency real-time data streams, designed for use in seismic observation stations, earthquake early warning systems, and integrated seismic monitoring networks. It converts multiple analog voltage inputs into digital outputs while supporting
data acquisition, recording, and network/serial port transmission. Featuring compact design, lightweight construction, and energy-efficient operation, the device provides comprehensive compatibility with instruments ranging from very broadband seismometers to strong-motion accelerometers, meeting diverse seismic observation requirements.
Available in three-channel and six-channel configurations, the three-channel version includes 3 high-speed analog input channels and 3 low-speed analog input channels, supporting a triaxial seismometer with dedicated low-speed analog inputs for zero-point calibration. The six-channel configuration features 6 high-speed and 6 low-speed analog
input channels, enabling simultaneous operation of two triaxial seismometers.
The EDAS-24HR input amplifier features three balanced differential input channels, significantly enhancing its common-mode interference resistance. With four measurement range settings (±20V, ±10V, ±5V, and ±2.5V) designed for various seismometer applications, the device supports flexible range adjustment via software. The system is compatible
with products manufactured by Geolight Technology Co., Ltd In addition to the seismograph, it can also be connected to a third party manufacturer’s seismograph.
Technical Parameter
Number of data acquisition channels:
1) 3/6 high-speed acquisition channels;
2) 3/6 auxiliary data acquisition channel;
Seismic data acquisition channel:
●Input signal full value:±2.5 V,±5 V,±10 V or ±20V,balanced differential input;
●Input impedance:100 KΩ (singleside);
●A/D conversion:24bits;
●Dynamic range:>144dB@samplingrate of 50 Hz;
●Short circuit noise:less than 2.0 μV(effective value);
●Nonlinear distortion:< -110dB @50Hz sampling rate;
●Cross talk/passband fluctuation:< -110 dB/0.05 dB;
●Out-of-band attenuation:>135 dB;
●Digital filter:FIR digital filter,which can be set to linear phases hift and minimum phase shift;
●Multiple sampling rate output:each channel supports multiple
●Output sampling rate:1,10,20,50,100,200,500,1000,2000Hz; sampling rate data output atthe same time;
●Minimum output interval of real-time data:10 sampling points/ bag(low-latency real-time data is provided for earthquake early warning service);
●Calibration signal generator:16-bit DAC,programmed wave for mout put,current calibration:±10mA,voltage calibration:±5V;
●Signal types:square wave,sine wave, pseudo-random binary code signal frequency, amplitude and period can be set;
Auxiliary acquisition channel:
●Input signal full value: ±10V, double-ended balanced differential input;
● Input impedance:1MΩ(singleside);
● A/D conversion:24bits;
● Dynamic range:>135dB@Sampling rate is 1 Hz;
● Real-time data output interval:1 second;
● Local record format:compressed formator precursor instrument data format;
Timing:
●Stability of the based uring measurement:10-8,when synchronized with GPS module.
●Time service accuracy:When synchronized with the GNSS module, the clock drift is less than 1ms per day.
● Timing accuracy: when the GNSS module is not synchronized, the clock drift is less than 1ms/day;
●Timing input: IRIG-B code time signal, support GPS and Beidou timing system
●Attachment GNSS module:output IRIG-B code time signal;
Communication:
● Communication interface:two RS232C serial ports,one standard 10M/100M Ethernet card;
●Communication protocol:support TCP/IP ,FTP ,Telnet, Http and so on,in line with the seismic industry communication network protocol;
Take notes ：
●Storage media: default 8G/32G/64G/128G storage;
●Local record format:EVT,optional compressed format, supportMiniSEED format;
●Recording function:supports simultaneous recording of continuous data and triggered event data,and can store data with two sampling rates at the same time.
