There are 4 SpO2 parameters; Philips FAST (A01), Nellcor OxiMax (A02), Masimo SET (A03), and Nellcor OxiMax (A04). Though Nellcor OxiMax (A04) is an internal update to the OxiMax (A02), it uses the same cables. The first 3 characters of the 6 character option sequence (displayed as A##C##) determine which SpO2 parameter your module has.
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