40 C.F.R. § 1065.790

Mass standards.

Last amended: 2023Year: 2026Length: 69 wordsSubsections: 1Official source

Cite as 40 C.F.R. § 1065.790 (2026)

(a) PM balance calibration weights. Use PM balance calibration weights that are certified as NIST-traceable within ±0.1% uncertainty. Make sure your highest calibration weight has no more than ten times the mass of an unused PM-sample medium. (b) Dynamometer, fuel mass scale, and DEF mass scale calibration weights. Use dynamometer and mass scale calibration weights that are certified as NIST-traceable within ±0.1% uncertainty. [88 FR 4687, Jan. 24, 2023]
40 C.F.R. § 1065.790: Mass standards. | Justis AI