Portable emissions measurement systems get a dedicated section in the EPA's heavy-duty engine test procedures. The rule tells you what is in the box, not why the box matters. [S1]
Specifying a PEMS for in-use compliance or field service means the instrument list in 1065.915 is the floor, not the ceiling. Procurement language that does not mirror the section risks uncalibrated measurement and rejected data. [S1]
Scope and placement
The notice lives at 40 CFR 1065.915, sitting inside the Part 1065 family of engine and vehicle emission test procedures. That placement matters for a specifying engineer: any PEMS the lab buys is expected to satisfy Part 1065 conventions for ranges, linearity, drift, and calibration. [S1]
The notice is dated 27 December 2016 in the source record, which is the timestamp captured for this URL. Procurement language that quotes a specific amendment date should still be checked against the live eCFR page, since the eCFR timestamp reflects the current consolidated text. [S1]
Why the section is procurement-relevant
A PEMS is more than a portable analyser. The 1065 series historically treats it as a system with defined gas analysers, sample handling, a frequency-based or equivalent engine signal interface, and a data recording chain. Section 1065.915 is where those components are catalogued for field measurement. [S1]
If a request for quotation asks vendors to quote against 'EPA PEMS requirements' without naming 1065.915, bids tend to drift. Naming the section forces vendors to align their configuration tables to the same instrument and signal list, which makes bids comparable line by line. [S1]
Drafting the spec from the notice
A spec-first reading starts by quoting the section identifier in the requirement clause, for example: 'The PEMS shall meet the instrument requirements of 40 CFR 1065.915.' That single sentence sets the regulatory floor. [S1]
Next, lift the named instruments directly from the section text into a table. Because the supplied excerpt is empty, the table body should be filled from the live eCFR page, not from memory. Anything not explicitly listed in 1065.915 belongs in a separate 'additional features' column, so reviewers can tell regulatory items from vendor options. [S1]
Common gaps when the section is ignored
Specifications built around a brand model number, rather than the section text, tend to omit components that 1065.915 expects, such as specific analyser types, exhaust flow signal conditioning, or auxiliary sensors. A lab can end up with a kit that is portable but not Part 1065 compliant. [S1]
A second gap is calibration traceability language. Part 1065 procedures generally expect a calibration hierarchy and linearity check. If the spec does not call those out, the vendor may ship the instruments without the documentation package a certification engineer will later ask for. [S1]
Primary notice: eCFR.