Hybrid torque standard machine for 1 kN(centre dot)m developed in CENAM

摘要

The torque laboratory at the Centro Nacional de Metrologia in Mexico (CENAM) started operations in 1997 with the design, built up and set up of a torque transfer standard machine for 2 kN(centre dot)m (TTSM-2kN(centre dot)m). Since that time, a total of five torque standards have been developed at CENAM. Two of them realize the quantity via the primary method (dead weights applied in a lever arm of a well known length) in the measuring ranges of 2 kN(centre dot)m and 1 kN(centre dot)m. The other three transfer standard machines are in the ranges from 20 N(centre dot)m and 2 kN(centre dot)m, and the last one is a TTS machine which is in the set up stage, with a range up to 20 kN(centre dot)m. This paper gives general information about the design, build up and set up of the torque standard machine up to 1 kN(centre dot)m which has a dual function, this is, realizing the quantity with a primary torque standard method (PTSMe) and/or disseminating it with a torque transfer standard method (TTSMe); depending on the type of calibration one wishes to perform.