Establishment of torque standards in KRISS of Korea |
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| Park Yon-Kyu, K. Min-Seok, K. Jong-Ho, C. Jae-Hyuk, K. Dae-Im |
- Abstract:
- Korea Research Institute of Standards and Science(KRISS) has developed a 100 N·m and a 2 kN·m deadweight torque standard machines. The 100 N·m torque machine can generate torque from 0.1 N·m to 110 N·m. The length of its torque arm is 0.25 m for both sides. It uses continuous deadweight stack. At each side, it has three different deadweight stacks. By rotating the base plate on which the deadweight stacks are located, the machine can adjust a suitable deadweight stack of appropriate torque range. Its relative uncertainty is 5 × 10-4 from 0.1 N·m to 1 N·m and 5 × 10-5 from 1 N·m to 110 N·m. The 2 kN·m deadweight torque machine uses a continuous deadweight stack at the left side and a binary type combination deadweight stack at the right side. By combining both deadweight stacks, the machine can generate torque from 10 N·m to 2200 N·m for both clockwise and counter-clockwise directions. The machine fixes its torque arm when changing the torque to maintain previous torque level. Its relative expanded uncertainty is 5 × 10-5.
- Keywords:
- torque, torque standard machine, uncertainty, intercomparison
- Download:
- IMEKO-TC3-2007-102u.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC3
- Event name:
- Cultivating Metrological Knowledge
- Title:
20th Conference on Measurement of Force, Mass and Torque (together with 3rd TC16 Conference on Pressure Measurement & 1st TC22 Conference on Vibration Measurement)
- Place:
- Merida, MEXICO
- Time:
- 27 November 2007 - 01 December 2007