eCFR Reference Browser

---

title: "40 CFR §89.406"

source: "https://www.ecfr.gov/current/title-40/section-89.406"

title_number: "40"

volume_number: "22"

chapter_number: "Unknown"

subchapter_code: "C"

subchapter_subject: "AIR PROGRAMS (CONTINUED)"

part_code: "89"

part_subject: "CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES"

subpart_code: "E"

subpart_subject: "Exhaust Emission Test Procedures"

section_number: "89.406"

section_subject: "Pre-test procedures."

cfr_reference: "40 CFR 89.406"

title_name: "Title 40"

title_subject: "Protection of Environment"

parts_covered: "Parts 87 to 95"

revised_date: "Revised as of July 1, 2017"

publication_date: "As of July 1, 2017"

contains_description: "Containing a codification of documents of general applicability and future effect"

publication_info: "Published by the Office of the Federal Register National Archives and Records Administration as a Special Edition of the Federal Register"

---

(a)Allow a minimum of 30 minutes warmup in the standby or operating mode prior to spanning the analyzers.

(b)Replace or clean the filter elements and then vacuum leak check the system per § 89.316(a). Allow the heated sample line, filters, and pumps to reach operating temperature.

(c)Perform the following system checks:

(1)Check the sample-line temperatures (see § 89.309(a)(4)(ii) and (a)(5)(i)(A)).

(2)Check that the system response time has been accounted for prior to sample collection data recording.

(3)A hang-up check is permitted, but is optional.

(d)Check analyzer zero and span at a minimum before and after each test. Further, check analyzer zero and span any time a range change is made or at the maximum demonstrated time span for stability for each analyzer used.

(e)Check system flow rates and pressures.

§89.406 - Pre-test procedures.