The Gravity Field in Force Standard Machines

• Abstract:

  The gravity acceleration g plays an important role in several physical quantities as provided by National Metrology Institutes. The unit of force is realized in dependence on g in force standard machines (FSM). We present the results of the combination of forward modeling and gravimetric observations to determine the absolute value of g inside the new 200 kN FSM of the Physikalisch-Technische Bundesanstalt (PTB). A model of the machine itself and gravimetric measurements, performed prior and after the installation of the FSM, are compared. The agreement is within 10 nm/s². The final uncertainty concerning g is 1.2 × 10^-7 due to temporal variations typically neglected in force measurements.
• Keywords:

  gravity, force standard machine, gravimetry, forward gravity modelling
• Download:

  IMEKO-TC3-2017-044.pdf
• DOI:

  _unreg_tc3-2017.044

Event details:

• IMEKO TC:

  TC3
• Event name:

  TC3 Conference 2017 - Measurement facing new challenges!
• Title:

  23^rd Conference on the Measurement of Force, Mass and Torque (together with 4^th TC22 Conference on Vibration Measurement and 13^th TC5 Conference on the Measurement of Hardness)

• Place:

  Helsinki, FINLAND
• Time:

  30 May 2017 - 1 June 2017