A completely new gravimeter designed to eliminate cross-coupling errors specific to beam-type gravimeters, frequent damper adjustments, and issues with vibration sensitivity.
A gravimeter for marine applications, announced after approximately three years of research and development. It is a completely new gravimeter designed to eliminate the cross-coupling errors specific to beam-type gravimeters, the need for frequent damper adjustments, and issues related to vibration sensitivity. - By constraining the proof mass to vertical linear motion, it eliminates the cross-coupling errors inherent in traditional beam-type gravimeters. - No damper adjustments are necessary. - It employs liquid damping, which nearly eliminates sensitivity to vibrations commonly found in air-damped sensors. - Residual errors due to minor manufacturing inhomogeneities are kept low, at 3 to 5 times lower than those of beam-type sensors. Unlike beam-type sensors, the imperfections' errors stabilize over time, eliminating the need for regular inspections to track changes. - Furthermore, it resolves the slope error (reading errors due to beam position under dynamic conditions) that is a drawback of beam-type gravimeters.
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➤ Sensor Specifications Type: Metal Zero-Length Spring Hardened Metal Micrometer Screw Measurement Area: - Standard: Worldwide 7,000 mGal over sea - Optional: Worldwide 10,000 mGal for aviation Operating Temperature: -15 to +50℃ Drift: Less than 3 mGal per month after aging Reproducibility in stationary state: < 0.2 mGal ➤ Control System Required Power Supply: 87 to 270 Vac, 47 to 63 Hz, Single Phase Power Consumption: - Operating: 1A* - Maximum: 2.5A* *Measured at 117 Volts, 60 Hz Recording Data Resolution: 0.01 mGal Clock Power: Frequency: 200 Hz Temperature Stability: 5 ppm -20℃ < T < +70℃ Short-term Aging: 1 X 10^-9/second ➤ Size Stabilization Platform and Sensor: Width 69 cm, Depth 56 cm, Height 64 cm System Control Module: Width 48 cm, Depth 14 cm, Height 9 cm Power Module (Desktop Package): Width 53 cm, Depth 46 cm, Height 18 cm
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