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§ 1066.215 Summary of verification procedures for chassis dynamometers.
(a) Overview. This section describes the overall process for verifying and calibrating the performance of chassis dynamometers.
(b) Scope and frequency. The following table summarizes the required and recommended calibrations and verifications described in this subpart and indicates when they must occur:
Table 1 of § 1066.215—Summary of Required Dynamometer Verifications
Type of verification | Minimum frequency a |
---|---|
§ 1066.220: Linearity verification | Speed: Upon initial installation, within 370 days before testing, and after major maintenance. Torque (load): Upon initial installation and after major maintenance. |
§ 1066.225: Roll runout and diameter verification | Upon initial installation and after major maintenance. |
§ 1066.230: Time verification | Upon initial installation and after major maintenance. |
§ 1066.235: Speed measurement verification | Upon initial installation, within 370 days before testing, and after major maintenance. |
§ 1066.240: Torque (load) transducer verification | Upon initial installation, within 7 days of testing, and after major maintenance. |
§ 1066.245: Response time verification | Upon initial installation, within 370 days before testing, and after major maintenance. |
§ 1066.250: Base inertia verification | Upon initial installation and after major maintenance. |
§ 1066.255: Parasitic loss verification | Upon initial installation, after major maintenance, and upon failure of a verification in § 1066.270 or § 1066.275. |
§ 1066.260: Parasitic friction compensation verification | Upon initial installation, after major maintenance, and upon failure of a verification in § 1066.270 or § 1066.275. |
§ 1066.265: Acceleration and deceleration verification | Upon initial installation and after major maintenance. |
§ 1066.270: Unloaded coastdown verification | Upon initial installation, within 7 days of testing, and after major maintenance. |
§ 1066.275 Dynamometer readiness verification | Upon initial installation, within 1 day before testing, and after major maintenance. |