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12/10/2020
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The following table summarizes the required and recommended calibrations and verifications described in this subpart and indicates when these have to be performed:
| Type of calibration or verification | Minimum frequency 1 |
|---|---|
| 1 Perform calibrations and verifications more frequently than we specify, according
to measurement system manufacturer instructions and good engineering judgment.
2 Perform linearity verification either for electrical power or for current and voltage. 3 The CVS verification described in §1065.341 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. | |
| §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 Fuel flow rate: Upon initial installation, within 370 days before testing, and after major maintenance. DEF flow: 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. 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. 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 verification 3 | Upon initial installation, within 35 days before testing, and after major maintenance. |
| §1065.342 Sample dryer verification | For thermal chillers: Upon installation and after major maintenance.
For osmotic membranes; 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 initial installation and after major maintenance.
Optimize and determine CH4 response for THC FID analyzers: Upon initial installation and after major maintenance. Verify CH4 response for THC FID analyzers: 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 initial installation, within 185 days before testing, and after major maintenance. |
| §1065.362: Raw exhaust FID O2 interference | For all FID analyzers: Upon initial installation, and after major maintenance.
For THC FID analyzers: 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. |
[81 FR 74164, Oct. 25, 2016]
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Copyright 2024 J. J. Keller & Associate, Inc. For re-use options please contact copyright@jjkeller.com or call 800-558-5011.