CEMS Inspection Sheet Appendix A
7. Calibration Gases
What to Inspect
Spot check the cylinder certificates versus the cylinder numbers engraved on the cylinder. Table A may be used to record information for each cylinder.
Verify that gases meet calibration gas definition in ' 72.2. See Table B.
Check the expiration date of gas in cylinders. Use of an expired cylinder is not in compliance with ' 75.21(c).
Check the concentration values for each cylinder. Are concentration ranges correct for the span? Linearity test point ranges are shown below:
Point 1: 20% - 30% of span
Point 2: 50% - 60% of span
Point 3: 80% - 100% of span
Check the zero air gas documentation. (Supplier certification):
SO2, NOx and THC 0.1 ppm
CO 1 ppm, and CO2 400 ppm
[See ' 72.2 and Policy Manual 10.2, 10.3]
Record the concentration values to check against the values recorded by the DAHS for calibration error and linearity tests.
Read the cylinder regulator pressure. Cylinder pressure should not be < 150 psi.
Check the regulator outlet pressure. The pressure or calibration gas flow rate should be set as specified in the QA test procedures in the QA/QC plan.
Are stainless steel regulators used for SO2 cylinders?
Page A-6 Part 75 Field Audit Manual – July 16, 2003