ISA RP12.13.02

Abstract

<u>ANSI/ISA-RP12.13.02 (IEC 61779-6 Mod)</u> gives guidance on the selection, installation, use, and maintenance of electrically operated group II apparatus for the detection and measurement of flammable gases complying with the requirements of <u>ANSI/ISA-12.13.01 (IEC 61779-1 through 5 Mod)</u>. It is a compilation of practical knowledge to assist the user, and applies to apparatus, instruments and systems that indicate the presence of a flammable or potentially explosive mixture of gas or vapour with air by using an electrical signal from a gas sensor to produce a meter reading, to activate a visual or audible pre-set alarm or other device, or any combination of these. <br>NOTE &#8212; When in classified areas, the apparatus should be so installed and used that it is not capable of itself igniting a flammable gas-air mixture. It should therefore comply with the requirements of <u>ANSI/NFPA 70, Articles 500-505</u>. <br>For the purpose of this document flammable gases shall include flammable vapours. <br>This document applies only to group II apparatus intended for use in industrial and commercial safety applications, involving areas classified in accordance with <u>ANSI/NFPA 70, Articles 500-505</u>. <br>For the purpose of this doment, apparatus includes <br>a) fixed apparatus; <br>b) transportable apparatus; and <br>c) portable apparatus. <br>This document is not intended to cover the following: <br>a) Apparatus intended only for the detection of non-flammable toxic gases <br>b) Apparatus of laboratory or scientific type intended only for analysis or measurement purposes <br>c) Apparatus intended for underground mining applications <br>d) Apparatus intended for applications in explosives processing and manufacture <br>e) Apparatus intended only for process control applications <br>f) Apparatus intended for the detection of a potentially flammable atmosphere resulting from dust or mist in air