40 CFR 89.311 - Analyzer calibration frequency.
(a) Prior to initial use and after major repairs, bench check each analyzer (see § 89.315).
(b) Calibrations are performed as specified in §§ 89.319 through 89.324.
(c) At least monthly, or after any maintenance which could alter calibration, the following calibrations and checks are performed.
(1) Leak check the vacuum side of the system (see § 89.316).
(2) Check that the analysis system response time has been measured and accounted for.
(3) Verify that the automatic data collection system (if used) meets the requirements found in Table 3 in appendix A of this subpart.
(4) Check the fuel flow measurement instrument to insure that the specifications in Table 3 in appendix A of this subpart are met.
(d) Verify that all NDIR analyzers meet the water rejection ratio and the CO2 rejection ratio as specified in § 89.318.
(e) Verify that the dynamometer test stand and power output instrumentation meet the specifications in Table 3 in appendix A of this subpart.