(a) Calibrations shall be performed as specified in Secs. 86.1518-84 through 86.1526-84.
(b) At least monthly or after any maintenance which could alter calibration, check the calibration of the CO analyzer. Adjust or repair the analyzer as necessary.
(c) Water traps, filters, or conditioning columns should be checked before each test. [48 FR 52252, Nov. 16, 1983. Redesignated at 73 FR 37194, June 30, 2008]