Guralp Systems

모델명 : 3TB

제품용도 : 시추형 지진계(Broadband Borehole Seismometer)

3TB

▶SYSTEM

•Configuration / Topology: Triaxial orthogonal (ZNE)

•Feedback: Force feedback

▶SENSOR PERFORMANCE

•Velocity output band: 120 s - 50 Hz or 360 s - 50 Hz, other frequency response options available

•Output sensitivity / Clip Level: 2000 V/ms-1 differential output. ( optional from 1500 V/ms-¹ to 20 kV/ms-¹)

•Peak / Full scale output: Differential: ±20 V (40 V peak-to-peak) , Single-ended(e.g. mass position): ±10 V (20 V peak-to-peak)
•Cross axis rejection: >62 dB 

•Linearity: >107 dB horizontal, >111 dB vertical 

•Lowest spurious resonance: >140 Hz

•Self-noise below NLNM: > 0.005 to 20Hz (200 to 0.05 s) vertical

•Dynamic range: >140 dB

•CALIBRATION

•Type: Pulse, sine wave and broadband

•Calibration controls: Independent signal & enable lines exposed on sensor connector

•MASS / MASS MONITORING CONTROL

•Locking: Remote or automatic mass locking, unlocking and centring

•Mass centre: Remote automatic mass centreing

▶POWER

•power voltage range: 11-30VDC(24VDC recommended)

•power consumption: 1.1W

▶PHYSICAL/ENVIRONMENTAL

•Operating temperature: -20 to 75°C

•Case height with lifting loop: 1422mm(single jaw hole lock), 1354mm(three jaw hole lock)

•Enclosure/Materials: Stainless steel casing, Gold plated contacts, O-ring seals throughout

•Communication/connectors: 100bar/10Mpa waterproof connector

•Borehole diameter: 113mm to 229mm

•Borehole install mechanism: Spring-loaded jaw with passive skids or studs(>60kg force)