Non-electrical equipment for use in potentially explosive atmospheres - Protection by flow restricting enclosure "fr" included-in-kit Sample preparation and measurement protocol

Sample preparation and measurement protocol are not contained within this Technical Report

Sand casting

The method described is not suitable for measurement of the effective sound pressure level under ear-muffs in the case of impulsive noise nor for active noise reduction ear-muffs

For oxygen and helium gas mixtures

the syntax and semantics of commands and associated information data models that ensure effective communication between implementations of the standard

Non-electrical equipment for use in potentially explosive atmospheres - Protection by flow restricting enclosure "fr" included-in-kit Sample preparation and measurement protocol1 Scope This document specifies the requirements for the construction and testing of flow restricting enclosures for non electrical equipment intended for use in potentially explosive atmospheres if the atmosphere outside the enclosure becomes explosive rarely and for short durations only. This document supplements the requirements in EN 134631 the contents of which apply in full to equipment constructed in accordance with this document. Equipment