ASTM_F_3092_-_14.pdf

Designation:F309214Standard TerminologyRelating to Optical Fiber Sensing Systems1This standard is issued under the fixed designation F3092;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 terminology standard is a compilation of defini-tions of technical terms related to optical fiber sensing systems,used in the various sections of standards under the jurisdictionof ASTM Committee F36.1.2 Where possible definitions are stated as a singlesentence,with necessary supplementary information as aDiscussion.This approach is used to simplify explanations ofthe meanings of technical terms for the benefit of those notconversant with them,to facilitate a precise understanding andinterpretation of F36 ASTM standards.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.2.Referenced Documents2.1 ASTM Standards:2F2233 Guide for Safety,Access Rights,Construction,Liability,and Risk Management for Optical Fiber Net-works in Existing SewersF2303 Practice for Selection of Gravity Sewers Suitable forInstallation of Optical Fiber Cable and ConduitsF2304 Practice for Sealing of Sewers Using ChemicalGroutingF2349 Practice for Operation and Maintenance of IntegratedNatural Gas Pipelines and Optical Fiber SystemsF2350 Practice for Selection of Natural Gas Pipelines Suit-able for Installation of Optical Fiber SystemsF2414 Practice for Sealing Sewer Manholes Using ChemicalGroutingF2454 Practice for Sealing Lateral Connections and linesfrom the mainline Sewer Systems by the Lateral PackerMethod,Using Chemical GroutingF2462 Practice for Operation and Maintenance of Sewerswith Optical Fiber SystemsF2550 Practice for Locating Leaks in Sewer Pipes ByMeasuring the Variation of Electric Current Flow Throughthe Pipe WallF2551 Practice for Installing a Protective CementitiousLiner System in Sanitary Sewer Manholes3.Significance and Use3.1 Definitions in this standard are to be regarded as correctfor the terms found in other ASTM standards of CommitteeF36.Certain terms may be found in more than one standardissued under the jurisdiction of this committee and many ofthese terms have been placed in this standard.4.Terminologyabsorption,nthe loss of some or all of the energy containedin an electromagnetic wave to the medium in which it ispropagating,usually converted to heat.acceptance angle,nthe maximum angle,measured from theoptical fiber centerline to an incident light ray,within whichthe incident ray will be accepted for transmission by totalinternal reflection along the fiber.DISCUSSIONIf the incident angle is greater than the acceptanceangle,total internal reflection will not occur and the incident ray will belost by leakage.access rights,nagreements between various parties to obtaintemporary and permanent access to property for the purposeof constructing,maintaining,or changing optical fibernetworks.F2233accuracy,nthe closeness of the measured value to the true orthe ideal value of the parameter being measured and isaffected by both bias and precision.acoustic wave,nlongitudinal waves propagated by means ofadiabatic compression and decompression.acousto-optics,nthe science and technology of the interac-tions between sound waves and light waves passing throughmaterial media,especially as applied to the modulation anddeflection of laser beams by ultrasonic waves.acrylamide,norganic solid of white,odorless,acrylic resin-ous material available in flake-like crystals and in liquidform.The greatest use of acrylamide is as a coagulant aid in1This terminology is under the jurisdiction of ASTM Committee F36 onTechnology and Underground Utilities and is the direct responsibility of Subcom-mittee F36.91 on Terminology.Current edition approved July 1,2014.Published August 2014.DOI:10.1520/F309214.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 drinking water treatment.Other major uses of acrylamide arein soil stabilization,in grout for repairing sewers and inacrylamide gels used in biotechnology laboratories.F2414acrylate,na general term applied to various water-solubleacrylic resinous materials.F2414adit,nin tunneling,a tunnel driven from ground surface toprovide access to or drainage from underground workings;alength of tunnel driven for an exploration-exploration adit.advance,nin tunneling,the forward progress in the construc-tion of a tunnel,usually measured by the length created,orthe rate of segment positioning in terms of a number p