---
kind: "section"
citation: "40 C.F.R. § 1065.320"
title: "40"
number: "1065.320"
heading: "Fuel-flow calibration."
url: "https://uscodex.org/cfr/40/1065.320"
---

# §1065.320. Fuel-flow calibration.

- (a) **Calibrate fuel-flow meters upon initial installation.** Follow the instrument manufacturer's instructions and use good engineering judgment to repeat the calibration.
- (b) [Reserved]
- (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.

## Notes

### Amendments

[70 FR 40516, July 13, 2005, as amended at 86 FR 34541, June 29, 2021; 88 FR 4674, Jan. 24. 2023]

### Authority

Authority: 42 U.S.C. 7401-7671q.

### Source

Source: 70 FR 40516, July 13, 2005, unless otherwise noted.

### Amendments

[70 FR 40516, July 13, 2005, as amended at 86 FR 34541, June 29, 2021; 88 FR 4674, Jan. 24. 2023]