CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER C—AIR PROGRAMS (Parts 50–99) > PART 86—CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY VEHICLES AND ENGINES > SUBPART D—Emission Regulations for New Gasoline-Fueled and Diesel-Fueled Heavy-Duty Engines; Gaseous Exhaust Test Procedures (§86.301-79 to §86.348-79) > 86.320-79—Analyzer bench check.

86.320-79—Analyzer bench check.

(a) Prior to initial use and after major repairs verify that each analyzer complies with the following specifications:
(1) Response time (see § 86.315(a) ).
(2) Precision (see § 86.315(b) ).
(3) Noise (see § 86.315(c) ).
(4) Zero drift (see § 86.315(d) ).
(5) Span drift (see § 86.315(e) ).
(6) Water rejection ratio, NDIR analyzers only (see §§ 86.316(c) and 86.318 (b)(5).
(7) CO2 rejection ratio, NDIR analyzers only (see §§ 86.316(d) and 86.318(b)(6) ).
(8) Quench check, CL analyzers only (see § 86.327 ).
(b) If a stainless steel NO2 to NO converter is used, condition all new or replacement converters. The conditioning consists of either purging the converter with air for a minimum of 4 hours or until the converter efficiency is greater than 90 percent. The converter must be at operational temperature while purging. Do not use this procedure prior to checking converter efficiency on in-use converters.