EPS portable digital seismometer is a stand-alone and broadband seismometer. It is no need to lock the pendulum or adjust pendulum position, and the transfer function is very stable. EPS digital seismometer is embedded with three-component geophone sensors, high-sensitivity Beidou +GPS module, electronic compass, attitude sensor, bluetooth module and rechargeable lithium battery, which enable the seismometer could continuously work for over 20 days without any external power supply. EPS digital seismometer owns the functions of timed power-on acquisition, timed power-off after acquisition, or continuous data acquisition. It adopts USB, RS232, Bluetooth and other interactive work mode and data will be automatically stored locally.
EPS portable digital seismometer owns the features of Beidou +GPS timing, geographical location positioning, independently long time working, low-power consumption and etc. It is very suitable for unattended long period timing observation, natural micro seismic surface wave exploration and broadband seismic observation in different fields. The frequency response range for EPS portable seismometer could be more than 200Hz, which affords the requirements of artificial seismic sounding and transient surface wave exploration.
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|Amplitude Consistency between Channels||＜5%|
|Phase Difference between Channels||＜0.1ms|
|Crosstalk suppression between Channels||＞100db|
|Lateral Vibration Suppression||＜0.1%|
|Self-noise||The whole frequency range is lower than NHNM curve and 10s-200Hz below NLNM curve.|
|Overall Sensitivity for the Instrument||2.07e+10 Cnt/m/s|
|Overall Power Consumption||0.3w(under self-storage mode of operation)|
|External Power||9V(Power supply/Charging) with charging time＜12hours.|
|Sampling Rate||50,100, 250, 500 or 1000sps optional.|
|External Power Supply||5V～12V, Lithium Battery (Rechargeable).|
|Embedded High Precision Clock||OCXO,0.05PPM@4℃.|
|Storage||32GB(the storage can be extend to 64GB)|
|Data Format||MiniSEED(could be converted to SAC format).|
|Interactive Interface||Bluetooth, USB, or RS232 Serial Port.|
|Working Platform||Windows, Andriod.|
|Data Transmission||Universal Serial USB2.0 plugable TF card.|
|Continuous Working Time||＞20days(at 25℃).|
|Working Temperature||-20℃ to +55℃.|
* 3-component geophone and 3-directional geophone are also available.