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) > 86.319-79—Analyzer checks and calibrations; frequency and overview.

86.319-79—Analyzer checks and calibrations; frequency and overview.

(a) Prior to initial use and after major repairs, bench check each analyzer (see § 86.320 ).
(b) At least monthly during testing, check the NOX converter efficiency, as described in § 86.332.
(c) At least once every 30 days during testing, perform the following:
(1) Leak check the pressure side of the system (see § 86.328 ). If the option described in § 86.328(b)(2) is used, a pressure leak check is not required.
(2) Calibrate all analyzers (see §§ 86.330 through 86.332).
(3) Check the analysis system response time (see § 86.329 ). If the option described in § 86.329(b) is used, a response time check is not required.
(4) Verify that the automatic data collection system (if used) meets the chart reading requirements found in § 86.343.
(5) Check the fuel flow measurement instrument to insure that the specifications in § 86.314 are met. Flow meters of the tapered tube and float design (rotometers) or the balance beam principle need be checked only every 90 days.
(d) At least once every 90 days during testing check the water rejection ratio and the CO2 rejection ratio on all NDIR analyzers (see §§ 86.321 and 86.322 ).
(e) At least once every 180 days during testing check the dynamometer test stand and power output instrumentation (see § 86.333 ).

Code of Federal Regulations

[42 FR 45154, Sept. 8, 1977, as amended at 58 FR 58422, Nov. 1, 1993]