ASTM_D_6332_-_12.pdf

Designation:D633212Standard Guide forTesting Systems for Measuring Dynamic Responses ofCarbon Monoxide Detectors to Gases and Vapors1This standard is issued under the fixed designation D6332;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide describes testing systems used for measuringresponses of carbon monoxide(CO)alarms or detectorssubjected to gases,vapors,and their mixtures.1.2 The systems are used to evaluate responses of COdetectors to various CO concentrations,to verify that thedetectors alarm at certain specified CO concentrations,and toverify that CO detectors do not alarm at certain other specifiedCO concentrations.1.3 The systems are used for evaluating CO detector re-sponses to gases and vapors that may interfere with the abilityof detectors to respond to CO.1.4 Major components of such a testing system include achamber,clean air supply module,humidification module,gasand vapor delivery module,and verification and control instru-mentation.1.5 For each component,this guide provides a comparisonof different approaches and discusses their advantages anddisadvantages.1.6 The guide also presents recommendations for a mini-mum configuration of a testing system.1.7 UnitsThe values stated in SI units are to be regardedas standard.No other units of measurement are included in thisstandard.1.8 This guide does not purport to address all of the safetyconcerns,if any,associated with its use.It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.For more specific safety precautionaryinformation,see 6.2.2.Referenced Documents2.1 ASTM Standards:2D1193 Specification for Reagent WaterD1356 Terminology Relating to Sampling and Analysis ofAtmospheresD1945 Test Method for Analysis of Natural Gas by GasChromatographyD3162 Test Method for Carbon Monoxide in the Atmo-sphere(Continuous Measurement by Nondispersive Infra-red Spectrometry)D3195 Practice for Rotameter CalibrationD3249 Practice for General Ambient Air Analyzer Proce-duresD3687 Practice for Analysis of Organic Compound VaporsCollected by the Activated Charcoal Tube AdsorptionMethod2.2 Other Standards:UL 2034 Single and Multiple Station Carbon MonoxideAlarms3CFR 1910.1450 Occupational Exposure to HazardousChemicals in Laboratories43.Terminology3.1 DefinitionsFor definitions of terms used in this guide,refer to Terminology D1356.3.2 Definitions of Terms Specific to This Standard:3.2.1 air change ratethe volume of clean,humidified airplus contaminants that enters the chamber in 1 h,divided bythe internal volume of the chamber,expressed as air changesper hour(h1).1This guide is under the jurisdiction of ASTM Committee D22 on Air Qualityand is the direct responsibility of Subcommittee D22.05 on Indoor Air.Current edition approved April 1,2012.Published May 2012.Originallyapproved in 1998.Last previous edition approved in 1999 as D6332 99(2005).DOI:10.1520/D6332-12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from Underwriters Laboratories(UL),2600 N.W.Lake Rd.,Camas,WA 98607-8542,http:/.4Available from U.S.Government Printing Office Superintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www.access.gpo.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.2 chamberan enclosed test volume composed ofchemically inert materials supplied with a mixture of air,gases,or vapors,or combination thereof,having known composi-tions.3.2.3 CO alarm/detectoran alarm device consisting of anassembly of electrical and mechanical components withchemical,electrochemical,solid-state electronic,or other typesof sensors to detect the presence of CO gas in specified rangesof concentrations.3.2.4 sensorthe component included in the CO alarm/detector that senses CO gas.4.Summary of Guide4.1 This guide describes components of systems for testingCO detectors with mixtures of air and CO at different concen-trations of CO.The systems are also used for evaluating theresponses of CO detectors to mixtures of air and various gasesor vapors,or both.Such systems require clean air with apreselected level of relative humidity supplied to an environ-mental chamber.Gases and vapors are introduced in the cleanair supply or placed directly in the chamber to achieve desiredchamber concentration.The components of such systemsinclude devices or modules for supplying pure air,humidifyingair,supplying gases or vapors,or both,to be tested,re