SS3*/DTSS Seismometer

Description

Intrinsically safe three-component seismometer SS3*/DTSS for the ARAMIS M/E and ARP 2000P/E systems.

Key features:

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

- three integrated low-frequency GS-1 seismometers by Geospace with a digital transceiver module in a common enclosure,

- conversion of analog seismometer signal to digital form,

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

- synchronization of the sampling clock generator for AC converters,

- electrical locking and functional testing of the seismometer,

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

Specification

Number of recorded components		Three: X, Y, Z
Natural frequency of low-frequency GS-1 sensors		1.0 Hz ±10%
Permissible deviation angle from vertical during operation		±7.5^o on Z axis, ±0.5^o on X, Y axes
Sensitivity		118 V/m/s ±10%
Mass of moving coil in each sensor		700 g ±5%
Maximum coil displacement in each sensor		6.35 mm P-P
Shock resistance		50 G
Frequency bandwidth (without probe) – bandwidth limited by anti-aliasing filter:		• 250 Hz mode: 0 – 103.25 Hz; • 500 Hz mode: 0 – 206.5 Hz; • 1 kHz mode: 0 – 413.0 Hz; • 2 kHz mode: 0 – 826.0 Hz
Configurable high-pass mode		From 0.1 to 1 Hz with disable option
A/D converter resolution		24 bits
Processing dynamics (total SNR)		130 dB @ 250 Hz
Sampling frequency		250 Hz, 500 Hz, 1 kHz, 2 kHz
Adjustable gain		x2, x4, x8, x16, x32, x64, x128
Transmission type / Synchronization / Special usage conditions		DTSS – digital pulse transmission via telemetry 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		SS3d – anchor, floor SS3u – anchor, ceiling SS3f – legs, floor

Gallery

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