1、Designation:E115998(Reapproved 2009)Standard Specification forThermocouple Materials,Platinum-Rhodium Alloys,andPlatinum1This standard is issued under the fixed designation E1159;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the ye
2、ar 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 specification covers non-insulated platinum-rhodium alloys(weight percent composition),and platinumthermoelement
3、s that meet the requirement of SpecificationE230 and NIST Monograph 175.21.2 This specification does not cover platinum andplatinum-rhodium materials,that require a higher purity thanspecified in 5.1,such as used for temperature coefficient ofresistance(TCR)measurements or standards type calibration
4、.For requirements of this superior quality,it is suggested thatsuppliers of precious metals be contacted.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 and he
5、alth practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 The following documents of the issue in force on thedate of material purchase form a part of this specification to theextent referenced herein.2.2 ASTM Standards:3B561 Specification for R
6、efined PlatinumB616 Specification for Refined RhodiumE207 Test Method for Thermal EMF Test of Single Thermo-element Materials by Comparison with a Reference Ther-moelement of Similar EMF-Temperature PropertiesE220 Test Method for Calibration of Thermocouples ByComparison TechniquesE230 Specification
7、 and Temperature-Electromotive Force(EMF)Tables for Standardized ThermocouplesE344 Terminology Relating to Thermometry and Hydrom-etry3.Terminology3.1 DefinitionsThe definitions given in Terminology E344apply to terms used in this specification.3.2 Definitions of Terms Specific to This Standard:3.2.
8、1 thermocouple type,na nominal thermoelectric classof thermoelement materials that,used as a pair,have astandardized relationship and tolerance between relative See-beck EMF and temperature,physical characteristics,and anassigned type letter designator and color code.3.2.1.1 DiscussionLetter designa
9、tors and color codes aredefined in the United States by ANSI/ASTM E230.Descrip-tions of letter designators and color codes may also be found inASTM MNL-12.44.Ordering Information4.1 Orders for material under this specification shall includethe following:4.1.1 ASTM designation and date of issue,4.1.2
10、 Thermocouple type(3.2.1),4.1.3 Thermoelement diameter and tolerance(5.5),4.1.4 Annealing requirements(5.4),4.1.5 Quantity required(5.6,5.7),4.1.6 Specify standard or special tolerance on the initialvalue of EMF vs.temperature,4.1.7 Calibration requirement(5.8),4.1.8 Chemical analysis(7.2.1),4.1.9 C
11、ertified test results(7.2.2),and4.1.10 Statement of compliance(7.2.3).5.Requirements5.1 PurityThe purity of platinum for use in the negativethermoelement of Type R and Type S thermocouples shall beGrade 99.99,as specified in Specification B561.1This specification is under the jurisdiction of ASTM Co
12、mmittee E20 onTemperature Measurement and is the direct responsibility of Subcommittee E20.04on Thermocouples.Current edition approved May 1,2009.Published June 2009.Originallyapproved in 1987.Last previous edition approved in 2003 as E1159 98(2003).DOI:10.1520/E1159-98R09.2“Temperature-Electromotiv
13、e Force Reference Functions and Tables for theLetter-Designated Thermocouple Types Based on the ITS-90,”NIST Monograph175 and Supplement 1.Available from NIST,U.S.Dept.of Commerce,Gaithers-burg,MD 20899.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Servic
14、e at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4Manual on the Use of Thermocouples in Temperature Measurement,ASTMMNL-12,Fourth Edition,ASTM,April 1993.(Revision of STP 470B).Copyright ASTM International,100 Ba
15、rr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.1.1 The purity of platinum,before alloying,for use in thepositive thermoelement of Type R,S,and both thermoelementsof Type B shall be Grade 99.99,as specified in SpecificationB561.5.1.2 The purity of rhodium,before alloying
16、,for use in thepositive thermoelement of Type R,S,and both thermoelementsof Type B shall be Grade 99.95,as specified in SpecificationB616.5.1.3 In the case of a conflict between the material compo-sition and the EMF output of the thermoelement,the calibra-tion requirement of Specification E230 shall govern.5.2 Physical ConditionAll material to be supplied shallconsist of continuous lengths which shall be free of kinks andshall be round and smooth.Any pits or dents that exceed 10%of the diameter
