1065.303—Summary of required calibration and verifications
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 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. |
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| Torque: Upon initial installation, within 370 days before testing and after major maintenance. | |
| Electrical power: Upon initial installation, within 370 days before testing and after major maintenance. | |
| Fuel flow: Upon initial installation, within 370 days before testing, and after major maintenance. | |
| Clean gas and diluted exhaust flows: 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: 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: 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 b | 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 | Calibrate all FID analyzers: Upon initial installation and after major maintenance. |
| THC FID optimization, and THC FID verification | 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. | |
| § 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. |
| § 1065.370 : 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. |
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| § 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. | |
| a Perform calibrations and verifications more frequently, according to measurement system manufacturer instructions and good engineering judgment. | |
| b 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. | |