FG5-X absolute gravimeter

Micro-g LaCoste is proud to announce the new state of the art in absolute gravity measurements! The FG5-X is a “follow on” instrument to the “absolute standard” that is the FG5 freefall gravimeter. The FG5-X features an improved dropping chamber and an improved electronic interface.

The new FG5-X dropping chamber has the following features and improvements:

• Extended freefall length – 33cm, 260ms – in the same original FG5 droppping chamber height (65% longer in distance, 30% longer in time than a standard FG5).
• Redesigned drive system.
  • Counterweighted elevator to reduce mechanical recoil and air gap modulation.
  • Improved microprocessor servo controller. Eliminates field tuning
  • Increased motor power for better tracking.
  • Inline drive system to reduce horizontal accelerations (Coriolis) of test mass
• New test mass design reduces decelerations caused by external magnetic fields

The new System Interface Module (SIMx) provides smaller, lighter, and more robust electronic control:

• Reduces size of total electronics by two full rack units
• Includes Dropper Controller
• Includes Superspring Controller
• Includes System A/D interface (eliminates need for National Instruments A/D card)
• Optional automatic system leveling control
• Includes integrated, GPS-based rubidium timing system
• USB integration for communication with new g-software
  • Provides user feedback if spring is out of range, dropper not in DROP MODE, and remote operation of FG5-X via internet connection.
  • Improved microprocessor servo controller. Eliminates field tuning

Upgrade path available for users of original FG5 absolute gravity meters.