cfr_sections: 40:40:40.0.1.1.2.3.19.2
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| section_id | title_number | title_name | chapter | subchapter | part_number | part_name | subpart | subpart_name | section_number | section_heading | agency | authority | source_citation | amendment_citations | full_text |
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| 40:40:40.0.1.1.2.3.19.2 | 40 | Protection of Environment | I | U | 1065 | PART 1065—ENGINE-TESTING PROCEDURES | C | Subpart C—Measurement Instruments | 1065.202 | § 1065.202 Data updating, recording, and control. | EPA | 42 U.S.C. 7401-7671q. | 70 FR 40516, July 13, 2005, unless otherwise noted. | [79 FR 23759, Apr. 28, 2014, as amended at 81 FR 74162, Oct. 25, 2016] | Your test system must be able to update data, record data and control systems related to operator demand, the dynamometer, sampling equipment, and measurement instruments. Set up the measurement and recording equipment to avoid aliasing by ensuring that the sampling frequency is at least double that of the signal you are measuring, consistent with good engineering judgment; this may require increasing the sampling rate or filtering the signal. Use data acquisition and control systems that can record at the specified minimum frequencies, as follows: Table 1 of § 1065.202—Data Recording and Control Minimum Frequencies a The specifications for minimum command and control frequency do not apply for CFVs that are not using active control. b 1 Hz means are data reported from the instrument at a higher frequency, but recorded as a series of 1 s mean values at a rate of 1 Hz. c For CFVs in a CVS, the minimum recording frequency is 1 Hz. The minimum recording frequency does not apply for CFVs used to control sampling from a CVS utilizing CFVs. d Dilution air flow specifications do not apply for CVS dilution air. |