40 CFR 89.406 - Pre-test procedures.
(a) Allow a minimum of 30 minutes warmup in the standby or operating mode prior to spanning the analyzers.
(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.