Code of Federal Regulations > Title 40 > Chapter I > Part 1065 > Subpart D - Subpart D—Calibrations and Verifications

U.S. Code of Federal Regulations

Regulations most recently checked for updates: Feb 11, 2026

MEASUREMENT OF ENGINE PARAMETERS AND AMBIENT CONDITIONS

§ 1065.310 - Torque calibration.

§ 1065.315 - Pressure, temperature, and dewpoint calibration.

§ 1065.301 - Overview and general provisions.

§ 1065.303 - Summary of required calibration and verifications.

§ 1065.305 - Verifications for accuracy, repeatability, and noise.

§ 1065.307 - Linearity verification.

§ 1065.308 - Continuous gas analyzer system-response and updating-recording verification—for gas analyzers not continuously compensated for other gas species.

§ 1065.309 - Continuous gas analyzer system-response and updating-recording verification—for gas analyzers continuously compensated for other gas species.

FLOW-RELATED MEASUREMENTS

§ 1065.320 - Fuel-flow calibration.

§ 1065.325 - Intake-flow calibration.

§ 1065.330 - Exhaust-flow calibration.

§ 1065.341 - CVS and PFD flow verification (propane check).

§ 1065.342 - Sample dryer verification.

§ 1065.345 - Vacuum-side leak verification.

CO AND CO2 MEASUREMENTS

§ 1065.350 - H2O interference verification for CO2 NDIR analyzers.

§ 1065.355 - H2O and CO2 interference verification for CO NDIR analyzers.

§ 1065.357 - CO2 interference verification for H2O FTIR analyzers.

HYDROCARBON MEASUREMENTS

§ 1065.360 - FID optimization and verification.

§ 1065.362 - Non-stoichiometric raw exhaust FID O2 interference verification.

§ 1065.365 - Nonmethane cutter penetration fractions and NMC FID response factors.

§ 1065.366 - Interference verification for FTIR analyzers.

§ 1065.369 - H2O, CO, and CO2 interference verification for photoacoustic alcohol analyzers.

§ 1065.370 - CLD CO2 and H2O quench verification.

§ 1065.372 - NDUV analyzer HC and H2O interference verification.

§ 1065.375 - Interference verification for N2O analyzers.

§ 1065.376 - Chiller NO2 penetration.

§ 1065.377 - Interference verification for NH3 analyzers.

§ 1065.378 - NO2-to-NO converter conversion verification.

PM MEASUREMENTS

§ 1065.390 - PM balance verifications and weighing process verification.

§ 1065.395 - Inertial PM balance verifications.