ASTM E1159-2015 Standard Specification for Thermocouple Materials Platinum-Rhodium Alloys and Platinum《铂铑合金和铂热电偶材料的标准规格》.pdf

1、Designation: E1159 15Standard 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 year of last

2、 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 platinumthermoelements t

3、hat 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 calibratio

4、n.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 a

5、nd health 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

6、 for Refined 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 Specifi

7、cation and Temperature-Electromotive Force(EMF) Tables for Standardized ThermocouplesE344 Terminology Relating to Thermometry and Hydrom-etry3. Terminology3.1 Definitions The definitions given in TerminologyE344 apply to terms used in this specification.3.2 Definitions of Terms Specific to This Stan

8、dard:3.2.1 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 Discussion

9、Letter designators 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 dat

10、e of issue,4.1.2 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

11、analysis (7.2.1),4.1.9 Certified 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 unde

12、r the jurisdiction of ASTM Committee E20 onTemperature Measurement and is the direct responsibility of Subcommittee E20.04on Thermocouples.Current edition approved Dec. 1, 2015. Published December 2015. Originallyapproved in 1987. Last previous edition approved in 2009 as E1159 98 (2009).DOI: 10.152

13、0/E1159-15.2“Temperature-Electromotive 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,Gaithersburg, MD 20899.3For referenced ASTM standards, visit the ASTM website,

14、 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.4Manual on the Use of Thermocouples in Temperature Measurement, ASTMMNL-12, Fourth Edition, ASTM, April 1993. (Revis

15、ion of STP 470B).Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.1.1 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

16、SpecificationB561.5.1.2 The purity of rhodium, before alloying, 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 ther

17、moelement, 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 shall be cause for rejection of

18、 the material.5.3 Cleanliness After material has been processed to itsfinal diameter and prior to subsequent anneal, it shall becleaned to remove all dirt, lubricant, fingerprints, or otherforeign residue. This state of cleanliness shall be maintainedthroughout testing and throughout any further wor

19、k andshipment.5.3.1 Prior to any testing, cleanliness of the material shall beverified by wiping with a cotton swab. Any indication of oil,dirt, or discoloration after wiping shall be cause for rejection ofthe spool from which the sample was taken.5.4 AnnealingPrior to any testing or shipment, mater

20、ialequal to or greater than 0.25 mm (0.010 in.) in diameter shallbe annealed by heating to at least 1000C in air for a minimumof 1 minute. Material smaller than 0.25 mm (0.010 in.) indiameter shall be supplied in the hard drawn temper unlessotherwise specified in the ordering information.5.5 Diamete

21、rSizes may range from 0.05 mm (0.002 in.) to1.5 mm (0.060 in.). Required size shall be stated in the orderinginformation. Suppliers practice on tolerance shall apply unlessotherwise stated in the ordering data (4.1.3). Any localizednecking or bulging of the conductor beyond tolerance limitsshall be

22、cause for rejection.NOTE 1Tolerances may vary from supplier to supplier.5.6 LengthQuantity of material supplied shall meet therequirements of the ordering data. Only a single continuouslength may be placed on any one spool. Splicing of wires isprohibited.5.7 WeightPurchaser may alternatively request

23、 materialby weight (grams or troy ounces) instead of length. All otherrequirements of this section shall be met. If weight is specified,a statement of weight/unit length accurate to within 1 % shallbe supplied for each item.5.8 Thermocouple CalibrationSample thermocouplesmade from the specified ther

24、moelements shall be calibratedaccording to the procedures set forth in Test Method E220. Thethermocouple shall conform to the appropriate table in Speci-fication E230. They shall meet the tolerance on the initial valueof EMF vs. temperature as specified in the tolerance require-ment of the ordering

25、information given in Section 4 and listedin Table 1 of Specification E230. Roll length shall be limited to610 m (2000 feet) for wire lot calibration.5.8.1 Sample Length The lengths of thermoelements to betested shall be approximately1m(3ft.) taken from each endof the spool or coil.5.8.2 Calibration

26、TemperatureUnless otherwise specifiedwith the order, the sample thermocouple shall be calibrated ata single temperature of 1200 6 100C.5.8.3 Alternative Calibration Method A thermoelementcalibration versus a suitable secondary referencethermoelement, may be specified as an option in the orderinginfo

27、rmation. A description of this method can be found in TestMethod E207.5.8.3.1 Unless otherwise specified with the order, the ther-moelement material shall be such that, when calibrated at asingle temperature of 1200C, a difference in the initial valueof EMF vs. temperature of no greater than 10 micr

28、ovolts maybe present between the beginning and the end of the thermo-element lot when tested in accordance with Test MethodsE207 and E220.5.8.3.2 The thermoelements shall be such that, whenmatched as a thermocouple, the EMF output shall meet thetolerance on the initial value of EMF vs. temperature a

29、sspecified in 4.1.6.6. Rejection6.1 Purchaser Test ResultsThe purchaser may performtests and inspection to verify that the delivered material meetsthe contract requirements. Failure to pass the purchasersinspection and test may be cause for rejection.6.2 The suppliers test results and inspection rep

30、ort may alsobe used as a basis of acceptance or rejection. Failure ofsuppliers to meet the contract requirements may be cause forrejection.7. Identification and Certification7.1 Material IdentificationThe supplier shall maintainsufficient records to ensure identification and traceability of allraw m

31、aterials, verifying that all material used is in compliancewith 5.1.7.2 Material CertificationWhen required, the suppliershall furnish with the shipment the following certification andstatements:7.2.1 Certified chemical analysis of the material from whichthe material was made,7.2.2 Certified results

32、 of tests performed on the materialsupplied in accordance with this specification and the orderingdocuments, and7.2.3 A statement of compliance that the material meetsrequested requirements of this specification.8. Keywords8.1 platinum; rhodium; thermoelement; thermocouple ma-terials; type B; type R

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