Abstract
<p class="Abstract"><span lang="EN-US">1 N·m torque standard machine was established at National Institute of Metrology (NIM) in 2013. The torque standard machine adopts deadweight and moment-arm type. The static air bearing with low friction is used to support the moment-arm, the invar alloy with the low expansion coefficient as the material of the moment-arm, the specially designed weight suspension part and weight loading system may ensure the applied force by small weights accurately and reliably. The mechanical structure of the machine is introduced, the results of performance test and uncertainty assessment are described. The expanded uncertainty (<em>k </em>= 2) is smaller than </span><span lang="EN-US">5</span><span lang="EN-US"> × 10<sup>-5</sup> in the range of 100 mN·m - 1 N·m, </span><span lang="EN-US">smaller than 1</span><span lang="EN-US">× 10<sup>-</sup></span><sup><span lang="EN-US">4</span></sup><span lang="EN-US"> in the range of </span><span lang="EN-US">10</span><span lang="EN-US"> mN·m - 100 mN·m.</span></p>
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
