Digital Broadband Seismograph Seismic Pulse Self Calibration Mode

Digital Broadband Seismograph

Digital Broadband Seismograph is mainly composed of seismic pickup system, data acquisition system, recording system, time service system and power system.

Main technical index

1. Frequency band width: GDS-D10(10s~150Hz), GDS-E20(20s~150Hz), GDS-F30(30s~150Hz),

GDS-G60 (60s to 100Hz), GDS-H120 (120s to 50Hz);

2. Self-noise level:

GDS-D10 (10s to 150Hz) is lower than the NHNM curve in the entire frequency band, and is lower than the NLNM curve in the 10s to 10Hz range.

GDS-E20 (20s to 150Hz) is lower than the NHNM curve in the entire frequency band, and lower than the NLNM curve in the 20s to 10Hz.

GDS-F30 (30s to 150Hz) is lower than the NHNM curve in the entire frequency band, and lower than the NLNM curve in the 30s to 10Hz.

GDS-G60 (60s to 100Hz) is lower than the NHNM curve for the entire frequency band, and is lower than the NLNM curve for 60s to 10Hz.

GDS-H120 (120s to 50Hz) is lower than NHNM curve in the whole frequency band, and lower than NLNM curve in 120s to 10Hz.

3, time synchronization error: 5×10-7s;

4. Amplitude consistency between channels: < 5%;

5. Phase difference between tracks: < 0.1ms;

6, sensitivity: ≥750V/(m/s), 1000V/(m/s);

7. Transverse vibration suppression: better than 0.1%;

8. Power consumption of the whole machine: autonomous working mode < 600mW@100sps;

Ethernet operating mode < 750mW@100sps;

9. Sampling rate: 50sps, 100sps, 200sps, 250sps, 500sps;

10, the lowest parasitic resonance frequency: > 500Hz;

11, digital filter: support linear correlation FIR and minimum phase FIR two filters, can be set;

12. Calibration mode: pulse self-calibration;

13, external power supply: 9V power supply charging;

14, status display: LED;

15, working temperature: -20℃ ~ +60℃;

16, independent working time: can work for more than 25 consecutive days;

17, distortion degree: less than 0.1%, distortion degree: better than -100dB;

18, dynamic range: > 140dB;

19, storage capacity: 32GB (dual card, removable, can be expanded to 64GB or larger capacity TF card);

20, real-time data stream, support multiple connection, and support FTP data download;

21, data format: MSD(can be converted to SAC format);

22, interactive interface: Ethernet, WIFI, Bluetooth and RS232 serial port;

23, waterproof depth: ≥1 m;

24, resolution: ≥24 bits;