Determine the outlet/inlet testing sequence a verifier performs before a medical gas system is placed into use

Steps

1. Confirm the general test sequence: initial pressure/leak test, cross-connection test, gas concentration/purity test, particulate/contaminant test, then terminal unit flow/pressure test — confirm exact ordering and full list against the current NFPA 99 edition text
2. Confirm the cross-connection test method: with all systems at atmospheric pressure, one system at a time is charged with nitrogen NF (commonly cited to 50 psig) while every other system/terminal is checked to confirm no test gas appears anywhere except the charged system
3. Confirm the gas concentration test analyzes each medical gas/medical air terminal for correct gas identity and concentration against NFPA 99 purity criteria, performed only after the cross-connection test passes
4. Confirm medical air is additionally tested for dew point and contaminants (oil, particulates, carbon monoxide, etc.) against NFPA 99 criteria
5. Confirm labeling/identification at each outlet/inlet is verified to match the correct system as part of the test sequence, and that all tests must be completed and documented in a verification report before the system is approved for patient use