§ 1065.303 - Summary of required calibration and verifications.

§ 1065.303 Summary of required calibration and verifications.

Cross Reference

Link to an amendment published at 86 FR 34536, June 29, 2021.

The following table summarizes the required and recommended calibrations and verifications described in this subpart and indicates when these have to be performed:

Table 1 of § 1065.303 - Summary of Required Calibration and Verifications

Type of calibration or verification	Minimum frequency 1 a
§ 1065.305: Accuracy, repeatability and noise	Accuracy: Not required, but recommended for initial installation. Repeatability: Not required, but recommended for initial installation.
	Noise: Not required, but recommended for initial installation.
§ 1065.307: Linearity verification
	Speed: Upon initial installation, within 370 days before testing and after major maintenance.
	Torque: Upon initial installation, within 370 days before testing and after major maintenance.
	Electrical power, current, and voltage: Upon initial installation, within 370 days before testing and after major maintenance.2 b
	Fuel mass flow rate: Upon initial installation, within 370 days before testing, and after major maintenance.
	Fuel mass scale: Upon initial installation, within 370 days before testing, and after major maintenance.
	DEF mass flow rate: Upon initial installation, within 370 days before testing, and after major maintenance.c
	DEF mass scale: Upon initial installation, within 370 days before testing, and after major maintenance.
	Intake-air, dilution air, diluted exhaust, and batch sampler flow rates: Upon initial installation, within 370 days before testing and after major maintenance, unless flow is verified by propane check or by carbon or oxygen balance. .d
	Raw exhaust flow rate: Upon initial installation, within 185 days before testing and after major maintenance, unless flow is verified by propane check or by carbon or oxygen balance. .d
	Gas dividers: Upon initial installation, within 370 days before testing, and after major maintenance.
	Gas analyzers (unless otherwise noted): Upon initial installation, within 35 days before testing and after major maintenance.
	FTIR and photoacoustic analyzers: Upon initial installation, within 370 days before testing and after major maintenance.
	GC-ECD: Upon initial installation and after major maintenance.
	PM balance: Upon initial installation, within 370 days before testing and after major maintenance.
	Pressure, temperature, and dewpoint: Upon initial installation, within 370 days before testing and after major maintenance.
§ 1065.308: Continuous gas analyzer system response and updating-recording verification - for gas analyzers not continuously compensated for other gas species	Upon initial installation or after system modification that would affect response.
§ 1065.309: Continuous gas analyzer system-response and updating-recording verification - for gas analyzers continuously compensated for other gas species	Upon initial installation or after system modification that would affect response.
§ 1065.310: Torque	Upon initial installation and after major maintenance.
§ 1065.315: Pressure, temperature, dewpoint	Upon initial installation and after major maintenance.
§ 1065.320: Fuel flow	Upon initial installation and after major maintenance.
§ 1065.325: Intake flow	Upon initial installation and after major maintenance.
§ 1065.330: Exhaust flow	Upon initial installation and after major maintenance.
§ 1065.340: Diluted exhaust flow (CVS)	Upon initial installation and after major maintenance.
§ 1065.341: CVS and batch sampler verification3 PFD flow verification (propane check)	Upon initial installation, within 35 days before testing, and after major maintenance.e
§ 1065.342 Sample dryer verification	For thermal chillers: Upon installation and after major maintenance. For osmotic membranes; Upon upon installation, within 35 days of testing, and after major maintenance.
§ 1065.345: Vacuum leak	For laboratory testing: Upon initial installation of the sampling system, within 8 hours before the start of the first test interval of each duty-cycle sequence, and after maintenance such as pre-filter changes.
	For field testing: After each installation of the sampling system on the vehicle, prior to the start of the field test, and after maintenance such as pre-filter changes.
§ 1065.350: CO2 NDIR H2O interference	Upon initial installation and after major maintenance.
§ 1065.355: CO NDIR CO2 and H2O interference	Upon initial installation and after major maintenance.
§ 1065.360: FID calibration THC FID optimization, and THC FID verification	Calibrate all FID analyzers: Upon upon initial installation and after major maintenance.
	Optimize and determine CH4 response for THC FID analyzers: Upon upon initial installation and after major maintenance.
	Verify CH4 response for THC FID analyzers: Upon upon initial installation, within 185 days before testing, and after major maintenance.
	Verify C2H6 response for THC FID analyzers if used for NMNEHC determination: Upon upon initial installation, within 185 days before testing, and after major maintenance.
§ 1065.362: Raw exhaust FID O2 interference	For all FID analyzers: Upon upon initial installation, and after major maintenance.
	For THC FID analyzers: Upon upon initial installation, after major maintenance, and after FID optimization according to § 1065.360.
§ 1065.365: Nonmethane cutter penetration	Upon initial installation, within 185 days before testing, and after major maintenance.
§ 1065.366: Interference verification for FTIR analyzers	Upon initial installation and after major maintenance.
§ 1065.369: H2O, CO, and CO2 interference verification for ethanol photoacoustic analyzers	Upon initial installation and after major maintenance.
§ 1065.370: CLD CO2 and H2O quench	Upon initial installation and after major maintenance.
§ 1065.372: NDUV HC and H2O interference	Upon initial installation and after major maintenance.
§ 1065.375: N2O analyzer interference	Upon initial installation and after major maintenance.
§ 1065.376: Chiller NO2 penetration	Upon initial installation and after major maintenance.
§ 1065.378: NO2-to-NO converter conversion	Upon initial installation, within 35 days before testing, and after major maintenance.
§ 1065.390: PM balance and weighing	Independent verification: Upon initial installation, within 370 days before testing, and after major maintenance.
	Zero, span, and reference sample verifications: Within 12 hours of weighing, and after major maintenance.
§ 1065.395: Inertial PM balance and weighing	Independent verification: Upon initial installation, within 370 days before testing, and after major maintenance.
	Other verifications: Upon initial installation and after major maintenance.

^{1 a} Perform calibrations and verifications more frequently than we specify, according to measurement system manufacturer instructions and good engineering judgment.

^{2 b} Perform linearity verification either for electrical power or for current and voltage. ³ The

CVS verification ^c Linearity verification is not required if DEF flow rate comes directly from the ECM signal as described in § 1065.247(b).

^d Linearity verification is not required if the flow signal's accuracy is verified by carbon balance error verification as described in § 1065.307(e)(5) or a propane check as described in § 1065.341.

^e CVS and PFD flow verification (propane check) is not required for systems that agree within ±2% based on a chemical balance of carbon or oxygen of the intake air, fuel, and diluted exhaust.

[81 FR 74164, Oct. 25, 2016

measurement systems verified by linearity verification as described in § 1065.307 or carbon balance error verification as described in § 1065.341(h).

[86 FR 34536, June 29, 2021]