Expansion of the calibration range and improvement of the uncertainty in the 1 kN·m deadweight torque standard machine |
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| K. Ohgushi, A. Nishino, T. OTA, K. Ueda |
- Abstract:
- Expansion of the calibration range and improvement of the uncertainty of realized torque in the 1 kN·m deadweight torque standard machine were investigated. The lower limit of the calibration range was lowered from 5 N·m to 0.5 N·m by developing new small linkage weight series. In addition, the sensitivity limit at the fulcrum was reevaluated. The moment-arm length was also re-measured after changing the thin metal bands at the ends of the moment-arm. As a result of these evaluations, relative expanded uncertainties (k = 2) of 7.3 × 10-5 and 2.9 × 10-5 could be obtained in the range from 0.5 N·m to 20 N·m and from 5 N·m to 1 kN·m, respectively.
- Keywords:
- torque, sensitivity limit, deadweight
- Download:
- IMEKO-TC3-2007-099u.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