40 CFR § 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:
Table 1 of § 1065.303—Summary of Required Calibration and Verifications
Type of calibration or verification | Minimum frequency |
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§ 1065.305: Accuracy, repeatability and noise |
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§ 1065.307: Linearity verification | |
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§ 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 PFD flow verification (propane check) | 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: CO |
Upon initial installation and after major maintenance. |
§ 1065.355: CO NDIR CO |
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 CH |
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Verify CH |
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Verify C |
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§ 1065.362: Raw exhaust FID O |
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: H |
Upon initial installation and after major maintenance. |
§ 1065.370: CLD CO |
Upon initial installation and after major maintenance. |
§ 1065.372: NDUV HC and H |
Upon initial installation and after major maintenance. |
§ 1065.375: N |
Upon initial installation and after major maintenance. |
§ 1065.376: Chiller NO |
Upon initial installation and after major maintenance. |
§ 1065.378: NO |
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. |
a Perform calibrations and verifications more frequently than we specify, according to measurement system manufacturer instructions and good engineering judgment.
b Perform linearity verification either for electrical power or for current and voltage.
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 measurement systems verified by linearity verification as described in § 1065.307 or carbon balance error verification as described in § 1065.341(h).