Telss-402/403 are telemetric two- or three-component seismic recording systems that deploy compact digital data acquisition modules, each of which combines GS-20DX geophones, 32-bit ADCs and the relevant electronics in one casing. Telemetry modules are connected to standard cable sections that are in-series coupled to each other. Up to two receiving lines with a total number of active channels of 200 could be connected to an interface module that in turn connects to a laptop or an operator’s tablet via USB, Ethernet or Wi-Fi (depending on realization).
The combination of seismic receivers with electronics in a single casing allows achieving the maximum level of seismic channel protection from induced noise. Deploying inexpensive cable sections with a different step between receiver points, the same set of digital modules can furnish seismic observations that allow studies at different depths.
Seismic stations Telss-402/403 are capable of providing a wide range of solutions for engineering surveys, studying the upper part of the section, 2D and 3D single-component and multicomponent surveys, and monitoring of deposits.
Portability, modularity, flexibility and low weight of Telss-402/403 enable organizing an adaptive scheme for the projects implementation, minimizing logistics costs, and adjusting the existing set of equipment for solving new tasks. The possibility of using the wireless interface module allows geophysical parties to conduct seismic surveys in hard-to-reach, environmentally sensitive places, as well as in urban areas.
|Seismic station type||telemetry|
|Number of channels||up to 1600|
|Instantaneous dynamic range||130 dB|
|Gain||0; 12; 24; 36 dB|
|Sampling period||0,25; 0,5; 1; 2; 4 ms|
|Frequency bandwidth||0-1600 Hz|
|Maximum record length||4096 readings per channel|
|Dead time of registration (pre-launch)||32 readings|
|Maximum signal amplitude at minimum gain||±2.5 V|
|Inherent noise level||0.08 µV|
|Nonlinear-distortions coefficient||0.0005 %|
|Mutual influence between channels||130 dB|
|Common-mode rejection ratio||120 dB|
|Power consumption||0.15 W per channel|
|Power system: external rechargeable battery||12 - 30 V|
|Temperature range||-40 ÷ +70 С°|
|Overall dimensions||230 х 167 х 90 mm|
|Control||Laptop / tablet|
|Overall dimensions of the module||105 х 83 х 77 mm (2C-module) / 106 x 90 x 77 mm (3C-module)|
|Number of channels in module||2 or 3|
|Number of modules per section||8|
|Distance between modules||arbitrary|
|Module power consumption||0.15 W per channel|
|Mass of the module||0.6 kg (2C-module) / 0.8 kg (3C-module)|