40 C.F.R. § 1066.215

Current through September 30, 2024

Section 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 frequencya
§ 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.

^a Perform calibrations and verifications more frequently, according to measurement system manufacturer instructions and good engineering judgment.

(c)Automated dynamometer verifications and calibrations. In some cases, dynamometers are designed with internal diagnostic and control features to accomplish the verifications and calibrations specified in this subpart. You may use these automated functions instead of following the procedures we specify in this subpart to demonstrate compliance with applicable requirements, consistent with good engineering judgment.

(d)Sequence of verifications and calibrations. Upon initial installation and after major maintenance, perform the verifications and calibrations in the same sequence as noted in Table 1 of this section, except that you may perform speed linearity verification after the verifications in §§ 1066.225 and 1066.230 . At other times, you may need to perform specific verifications or calibrations in a certain sequence, as noted in this subpart. If you perform major maintenance on a specific component, you are required to perform verifications and calibrations only on components or parameters that are affected by the maintenance.

(e)Corrections. Unless the regulation directs otherwise, if the dynamometer fails to meet any specified calibration or verification, make any necessary adjustments or repairs such that the dynamometer meets the specification before running a test. Repairs required to meet specifications are generally considered major maintenance under this part.

40 C.F.R. §1066.215