U.S. National Work Group (USNWG)
The USNWG works to promote, encourage, and participate in the establishment of a comprehensive set of legal metrology standards for commercial measurement of hydrogen for vehicle and other refueling applications including (1) device design, accuracy, installation, and use requirements; (2) method of sale requirements; (3) test procedures; and (4) fuel quality standards. The ultimate goal is that these standards will ensure the accuracy of measurements, enhance consumer protection, foster fair competition, and facilitate economic growth and trade.
The USNWG works through in-person meetings, conference calls, and email. The USNWG is currently accomplishing its goals through two subcommittees; one will work to simultaneously develop equipment standards and test procedures and a second will develop fuel specification requirements.
Related LinksU.S. National Work Group GuidelinesU.S. National Work Group Agenda Submission FormDeveloping Commercial Hydrogen Measurement StandardsDevelopment of International StandardsAlternative Test Methods Work Group Meeting
The 101st National Conference on Weights and Measures (NCWM) Interim Meeting will be held January 10-13, 2016 in San Diego, CA. Two proposals to modify NIST Handbook 44 Section 3.39 Hydrogen Gas-Measuring Devices-Tentative Code are being considered by the NCWM Specifications and Tolerances (S&T) Committee. S&T Item 339-1 is a proposal to align all measuring devices’ codes to recognize that required information on sealable metrological parameters may also be made available in an electronic format on Category 3 devices. S&T Item 339-2 is a proposal to temporarily widen the accuracy tolerances to include three new accuracy classes. It is likely that the USNWG will meet in March 2016 to discuss the outcome of proposals moving forward for further development, to gather more information, or elevated to a status for a July 2016 NCWM vote.