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UNCERTAINTY IN TORQUE CALIBRATION USING VERTICAL TORQUE AXIS ARRANGEMENT AND SYMMETRICAL TWO FORCE MEASUREMENT

Dieter Kenzler, Jörg Oblasser, Andreas Subaric-Leitis, Christian Ullner
  • Abstract:
    Calibration machines up to a torque range of 20 kN·m need extensive design if the force is performed by dead weights. A machine based on two force reference standards and a vertical torque axis may serve to avoid these specific problems. The precision force transducers work at a lever arm of precision length. The test piece is mounted in vertical arrangement between a hydraulically operating rotary-actuator and the torque measuring system. Such a calibration machine allows additionally performing easily continuous calibration. Regarding an overall relative uncertainty not greater than 2·10-4 there are some significant problems. The estimation of the uncertainty has been proved by comparative tests with the national torque standard by the PTB according to the guidelines EA-10/14 and EA-2/03.
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  • DOI:
    _unreg_tc3-2002.018

Event details:

  • IMEKO TC:
    TC3
  • Event name:
    Joint International Conference on Force, Mass, Torque, Hardness and Civil Engineering Metrology in the age of globalization
  • Title:

    18th Conference on Force, Mass and Torque (together with 8th HARDMEKO TC5 Conference on Hardness Measurement and 1st TC20 Conference on Civil Engineering Metrology)

  • Place:
    Celle, GERMANY
  • Time:
    24 September 2002 - 26 September 2002