1.1 This clause of the general standard applies except as follows (replacement): This particular specification specifies safety requirements for oxygen concentrators as defined in 3.1. This specification does not apply to oxygen concentrators intended to supply gas to several patients via a piped medical gas installation or to those intended for use in the presence of flammable anaesthetic or cleaning agents, or both.

1.2 The values stated in SI units are to be regarded as the standard.