ASTM_D_3864_-_12_2021.pdf

Designation:D386412(Reapproved 2021)Standard Guide forOn-Line Monitoring Systems for Water Analysis1This standard is issued under the fixed designation D3864;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 covers the selection,establishment,application,and validation and verification of monitoringsystems for determining water characteristics by continualsampling,automatic analysis,and recording or otherwisesignaling of output data.The system chosen will depend on thepurpose for which it is intended:whether it is for regulatorycompliance,process monitoring,or to alert the user of adversetrends.If it is to be used for regulatory compliance,the methodpublished or referenced in the regulations should be used inconjunction with this guide and other ASTM methods.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.Specific hazard statements are given in Section 7.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD3370 Practices for Sampling Water from Flowing ProcessStreamsD4210 Practice for Intralaboratory Quality Control Proce-dures and a Discussion on Reporting Low-Level Data(Withdrawn 2002)3D5540 Practice for Flow Control and Temperature Controlfor On-Line Water Sampling and AnalysisE178 Practice for Dealing With Outlying Observations2.2 ASTM Special Technical Publication:STP 442 Manual on Water43.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this standard,refer toTerminology D1129.3.2 Definitions of Terms Specific to This Standard:3.2.1 Calibrations:3.2.1.1 laboratory calibration curve for flow-throughsystems,ncalibration curve calculated from withdrawnsamples or additional standards that may be spiked or dilutedand analyzed using the appropriate laboratory analyzer.3.2.1.2 laboratory calibration curve for flow-throughsystems,ntype of sample used to generate a laboratorycalibration curve for flow-through systems.3.2.1.3 line sample calibration,ncoincidental comparisonof a line sample and adjustment of a continuous analyzer to thecompared laboratory analyzer or a second continuous analyzer.3.2.1.4 multiple standard calibration,nwhere the calibra-tion curve is calculated from a series of calibration standardscovering the range of the measurements of the sample beinganalyzed.3.2.1.5 probe calibration,nwhere the probe is removedfrom the sample stream and exposed to a calibration solutionand the analyzer is adjusted to indicate the appropriate value.Alternately,two probes are exposed to the same solution andthe on-line analyzer is adjusted to coincide with the pre-calibrated laboratory instrument.3.2.1.6 reference sample calibration,ncoincidental com-parison of a reference sample and adjustment of a continuousanalyzer to the compared laboratory analyzer results.1This guide is under the jurisdiction of ASTM Committee D19 on Water and isthe direct responsibility of Subcommittee D19.03 on Sampling Water and Water-Formed Deposits,Analysis of Water for Power Generation and Process Use,On-Line Water Analysis,and Surveillance of Water.Current edition approved Jan.1,2021.Published January 2021.Originallyapproved in 1979.Last previous edition approved in 2012 as D3864 12.DOI:10.1520/D3864-12R21.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from ASTM International Headquarters.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.13.2.2 cycle time,nthe interval betwee