ISA 92.00.04

This standard provides minimum requirements for fixed andtransportable open path toxic gas detection equipment.

This standard specifies the construction, performance andtesting of open path (line -ofsight) gas detectors that sense thepresence of toxic gas concentrations in air.

For equipment used for sensing the presence of multiple gases,this document applies only to the portion sensing the toxic gas.Sensing of combustible gases is outside the scope of thisdocument.

This standard addresses toxic gas detectors intended to providea broad indication or alarm, the purpose of which is to givewarning of possible presence of potentially toxic concentrations ofgas.

Conformance to this standard does not imply suitability for gasmonitoring. This standard does not apply to equipment of thelaboratory or scientific type used for analysis or measurement,equipment used for process control and process monitoring purposes,or equipment used for residential purposes.

This standard specifies the requirements for gas detectionequipment that are intended to detect gases in ambient air bymeasuring the spectral absorption by the gases over an extendedoptical path. The units of measurement and range of the gasdetection equipment are a mathematical integral of the gasconcentration along the optical path. The units of measurement areexpressed as full concentration of the toxic gas concentrationmultiplied by the distance (ppm.m).

This standard only specifies the requirements for instrumentapplications where calibration is performed using either the gas tobe detected or another gas for which response conversion dataappears in the instruction manual.

This standard does not address the electrical shock or firerequirements, and this standard does not address performance ofopen path detectors intended to detect chemical warfare agents(CWA’s).

Edition:

14

Published:

09/08/2014

ANSI:

ANSI Approved

Number of Pages:

40

File Size:

1 file , 930 KB