cfr_sections: 40:40:40.0.1.1.2.3.26.28

Current Code of Federal Regulations (eCFR) — the actual text of federal regulations in force. Covers 19 CFR titles with 123,000+ regulatory sections and full-text search.

Data license: Public Domain (U.S. Government data) · Data source: Federal Register API & Regulations.gov API

This data as json

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
40:40:40.0.1.1.2.3.26.28	40	Protection of Environment	I	U	1065	PART 1065—ENGINE-TESTING PROCEDURES	C	Subpart C—Measurement Instruments	1065.290	§ 1065.290 PM gravimetric balance.	EPA	42 U.S.C. 7401-7671q.	70 FR 40516, July 13, 2005, unless otherwise noted.	[73 FR 37300, June 30, 2008, as amended at 75 FR 68462, Nov. 8, 2010]	(a) Application. Use a balance to weigh net PM on a sample medium for laboratory testing. (b) Component requirements. We recommend that you use a balance that meets the specifications in Table 1 of § 1065.205. Note that your balance-based system must meet the linearity verification in § 1065.307. If the balance uses internal calibration weights for routine spanning and the weights do not meet the specifications in § 1065.790, the weights must be verified independently with external calibration weights meeting the requirements of § 1065.790. While you may also use an inertial balance to measure PM, as described in § 1065.295, use a reference procedure based on a gravimetric balance for comparison with any proposed alternate measurement procedure under § 1065.10. (c) Pan design. We recommend that you use a balance pan designed to minimize corner loading of the balance, as follows: (1) Use a pan that centers the PM sample media (such as a filter) on the weighing pan. For example, use a pan in the shape of a cross that has upswept tips that center the PM sample media on the pan. (2) Use a pan that positions the PM sample as low as possible. (d) Balance configuration. Configure the balance for optimum settling time and stability at your location.