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CEMS Inspection Sheet                                                                                           Appendix A

7.  Calibration Gases

What to Inspect

Observations

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

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