ISA RP12.12.03-2002

The purpose of this recommended practice is to provide guidance for the use of general-purpose portable
electronic products in certain hazardous (classified) locations.

This recommended practice does not address other considerations involving the use of portable
electronic products which may result in these devices being considered unsafe due to creation of a
distraction from important work tasks or radio frequency interference with measurement and control
equipment.

This recommended practice applies to both body worn and hand held portable electronic products for use
in Class I, and II, Division 2, Class I, Zone 2, and Class III, Division 1 and 2 Hazardous (Classified)
Locations which are not available listed or labeled for hazardous (classified) locations.

This recommended practice does not apply to products that are powered by premises wiring or connected
to a communication line during use in the hazardous (classified) location.