The measurement instrument calibration and verification requirements in 40 CFR part 1065, subpart D, apply with the following exceptions:
(a) The calibration and verification provisions of 40 CFR 1065.303 do not apply for engine speed, torque, fuel rate, or intake air flow.
(b) The linearity verification provisions of 40 CFR 1065.307 do not apply for engine speed, torque, fuel rate, or intake air flow. Section 1066.135 specifies additional linearity verification provisions that apply specifically for chassis testing.
(c) The provisions of Sec. 1066.220 apply instead 40 CFR 1065.310.
(d) The provisions of 40 CFR 1065.320, 1065.325, and 1065.395 do not apply.
(e) If you are measuring flow volumetrically (rather than measuring based on molar values), the provisions of Sec. 1066.140 apply instead of 40 CFR 1065.340.
(f) The provisions of Sec. 1066.150 apply instead 40 CFR 1065.350(c), 1065.355(c), 1065.370(c), and 1065.375(c).
(g) Table 1 of this section summarizes the required and recommended calibrations and verifications that are unique to testing under this part and indicates when these must be performed. Perform other required or recommended calibrations and verifications as described in 40 CFR 1065.303, with the exceptions noted in this section. Table 1 follows:
Table 1 of Sec. 1066.130--Summary of Required Calibrations and
Verifications------------------------------------------------------------------------
Type of calibration or
verification Minimum frequency \a\------------------------------------------------------------------------40 CFR 1065.307: Linearity The linearity verifications from 40
verification. CFR part 1065 do not apply under
this part for engine speed, torque,
fuel rate, or intake air flow; the
linearity verification described in
Sec. 1066.135 applies for the
following measurements:
Dynamometer speed: See Sec.
1066.220.
Dynamometer torque: See Sec.
1066.220.
40 CFR 1065.310: Torque........... This calibration does not apply for
testing under this part; see Sec.
1066.220.40 CFR 1065.320: Fuel flow........ This calibration does not apply for
testing under this part.40 CFR 1065.325: Intake flow...... This calibration does not apply for
testing under this part.40 CFR 1065.340: CVS calibration.. This calibration does not apply for
CVS flow meters calibrated
volumetrically as described in Sec.
1066.140.40 CFR 1065.345: Vacuum leak...... Required upon initial installation
of the sampling system; recommended
within 35 days before the start of
an emissions test and after
maintenance such as pre-filter
changes.40 CFR 1065.350(c), 1065.355(c), These provisions do not apply for
1065.370(c), and 1065.375(c). testing under this part; see Sec.
1066.150.40 CFR 1065.395: Inertial PM These verifications do not apply for
balance and weighing. testing under this part.------------------------------------------------------------------------\a\ Perform calibrations and verifications more frequently if needed to
conform to the measurement system manufacturer's instructions and good
engineering judgment.