SV*/DTSS Seismometer

Intrinsically safe single-component seismometer SV*/DTSS of the ARAMIS M/E system

Key features:

- seismic signal measurement module of the ARAMIS M/E or INGEO system,

- integrated low-frequency GS-1 seismometer by Geospace with a digital transceiver module in a shared housing,

- conversion of analog signal from the seismometer into digital form,

- data transmission to the surface digital receiver module OCGA or underground OCGD local data concentrator LKP,

- synchronization of the clock generator for A/C converters,

- electrical locking and functional testing of the seismometer,

- intrinsically safe device of Group I, Category M1 with protection level "ia", compatible with a measuring concentrator of level "ia" or "ib".

Number of recorded components	One: Z
Natural frequency of low-frequency GS-1-LF sensors	1.0 Hz ±10%
Permissible tilt angle from vertical during operation	± 7.5^o
Sensitivity	118 V/m/s
Mass of moving coil in each sensor	700g ±5%
Maximum coil displacement in each sensor	6.35 mm P-P
Shock resistance	50G
Transmitted frequency band (without probe) – limited by anti-aliasing filter:	500 Hz mode – 0-206.5 Hz 2 kHz mode – 0-826.0 Hz
Configurable high-pass filter	From 0.1 to 1 Hz with option to disable
A/C converter resolution	24 bits
Processing dynamic range (total SNR)	130 dB @ 250 Hz
Sampling frequency	500 Hz, 2 kHz
Adjustable gain	x2, x4, x8, x16, x32, x64, x128
Transmission type / Synchronization / Special application conditions	DTSS – pulse digital transmission via telecom power line
Transmission range	10 km for OCGA or 5 km for OCGD
IP protection rating	IP65
Additional functions	electrical locking, seismometer test
Mounting method	SVd – anchor, floor SVu – anchor, ceiling SVf – feet, floor