§1065.790. Mass standards.
40 C.F.R. § 1065.790
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.
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.
Notes, amendments, and revision history
Amendments
[88 FR 4687, Jan. 24, 2023]
Authority
Authority: 42 U.S.C. 7401-7671q.
Source
Source: 70 FR 40516, July 13, 2005, unless otherwise noted.
Amendments
[88 FR 4687, Jan. 24, 2023]