scope:

This standard applies to: - Flow-metering devices which are connected and disconnected by the operator at terminal units of a medical gas pipeline system for measurement and delivery of medical gases. They can be connected either directly or by means of flexible connecting assemblies. - Flow-metering devices which are connected and disconnected by the operator at gas-specific connection points of devices such as pressure regulators. It applies only to flow-metering devices for the following medical gases: oxygen, nitrous oxide, air for breathing, carbon dioxide, helium, xenon, specified mixtures of gases listed above, oxygen/nitrous oxide mixture (50/50 % V/V). Electrical or electronic flow-metering devices are excluded from the scope of this standard.