StacksVerified U.S. regulatory reference

40 CFR §1065.320

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Calibrate fuel-flow meters upon initial installation. Follow the instrument manufacturer's instructions and use good engineering judgment to repeat the calibration.
  2. (b)[Reserved]
  3. (c)You may remove system components for off-site calibration. When installing a flow meter with an off-site calibration, we recommend that you consider the effects of the tubing configuration upstream and downstream of the flow meter. We recommend specifying calibration reference quantities that are NIST-traceable within ±0.5% uncertainty.