ASTM E1159-98(2009)
(Specification)Standard Specification for Thermocouple Materials, Platinum-Rhodium Alloys, and Platinum
Standard Specification for Thermocouple Materials, Platinum-Rhodium Alloys, and Platinum
ABSTRACT
This specification covers non-insulated platinum rhodium alloys (weight percent composition), and platinum thermoelements. The purity of platinum for use in the negative thermo element of Type R and Type S thermocouples shall be of a specific Grade, as specified. The purity of platinum before alloying for use in the positive thermo element of Type R, S, and both thermo elements of Type B shall also be of a certain grade, as specified. All material to be supplied shall consist of continuous lengths which shall be free of kinks and shall be round and smooth. Any pits or dents that exceed a certain percentage of the diameter shall be cause for rejection of the material. After material has been processed to its final diameter and prior to subsequent anneal, it shall be cleaned to remove all dirt, lubricant, fingerprints, or other foreign residue. The thermo elements shall be such that, when matched as a thermocouple, the EMF output shall meet the tolerance on the initial value of EMF versus temperature as specified.
SCOPE
1.1 This specification covers non-insulated platinum-rhodium alloys (weight percent composition), and platinum thermoelements that meet the requirement of Specification E 230 and NIST Monograph 175.
1.2 This specification does not cover platinum and platinum-rhodium materials, that require a higher purity than specified in 5.1, such as used for temperature coefficient of resistance (TCR) measurements or standards type calibration. For requirements of this superior quality, it is suggested that suppliers of precious metals be contacted.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
General Information
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Standards Content (Sample)
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Designation: E1159 −98 (Reapproved2009)
Standard Specification for
Thermocouple Materials, Platinum-Rhodium Alloys, and
Platinum
This standard is issued under the fixed designation E1159; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E230 Specification and Temperature-Electromotive Force
(EMF) Tables for Standardized Thermocouples
1.1 This specification covers non-insulated platinum-
E344 Terminology Relating to Thermometry and Hydrom-
rhodium alloys (weight percent composition), and platinum
etry
thermoelements that meet the requirement of Specification
E230 and NIST Monograph 175.
3. Terminology
1.2 This specification does not cover platinum and
3.1 Definitions—The definitions given inTerminology E344
platinum-rhodium materials, that require a higher purity than
apply to terms used in this specification.
specified in 5.1, such as used for temperature coefficient of
3.2 Definitions of Terms Specific to This Standard:
resistance (TCR) measurements or standards type calibration.
3.2.1 thermocouple type, n—a nominal thermoelectric class
For requirements of this superior quality, it is suggested that
of thermoelement materials that, used as a pair, have a
suppliers of precious metals be contacted.
standardized relationship and tolerance between relative See-
1.3 This standard does not purport to address all of the
beck EMF and temperature, physical characteristics, and an
safety concerns, if any, associated with its use. It is the
assigned type letter designator and color code.
responsibility of the user of this standard to establish appro-
3.2.1.1 Discussion—Letter designators and color codes are
priate safety and health practices and determine the applica-
defined in the United States by ANSI/ASTM E230. Descrip-
bility of regulatory limitations prior to use.
tions of letter designators and color codes may also be found in
ASTM MNL-12.
2. Referenced Documents
2.1 The following documents of the issue in force on the
4. Ordering Information
dateofmaterialpurchaseformapartofthisspecificationtothe
4.1 Orders for material under this specification shall include
extent referenced herein.
the following:
2.2 ASTM Standards:
4.1.1 ASTM designation and date of issue,
B561 Specification for Refined Platinum
4.1.2 Thermocouple type (3.2.1),
B616 Specification for Refined Rhodium
4.1.3 Thermoelement diameter and tolerance (5.5),
E207 Test Method forThermal EMFTest of SingleThermo-
4.1.4 Annealing requirements (5.4),
element Materials by Comparison with a Reference Ther-
4.1.5 Quantity required (5.6, 5.7),
moelement of Similar EMF-Temperature Properties
4.1.6 Specify standard or special tolerance on the initial
E220 Test Method for Calibration of Thermocouples By
value of EMF vs. temperature,
Comparison Techniques
4.1.7 Calibration requirement (5.8),
4.1.8 Chemical analysis (7.2.1),
This specification is under the jurisdiction of ASTM Committee E20 on
4.1.9 Certified test results (7.2.2), and
Temperature Measurement and is the direct responsibility of Subcommittee E20.04
4.1.10 Statement of compliance (7.2.3).
on Thermocouples.
Current edition approved May 1, 2009. Published June 2009. Originally
5. Requirements
approved in 1987. Last previous edition approved in 2003 as E1159 – 98 (2003).
DOI: 10.1520/E1159-98R09.
5.1 Purity—The purity of platinum for use in the negative
“Temperature-Electromotive Force Reference Functions and Tables for the
thermoelement of Type R and Type S thermocouples shall be
Letter-Designated Thermocouple Types Based on the ITS-90,” NIST Monograph
175 and Supplement 1. Available from NIST, U.S. Dept. of Commerce,
Grade 99.99, as specified in Specification B561.
Gaithersburg, MD 20899.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on Manual on the Use of Thermocouples in Temperature Measurement, ASTM
the ASTM website. MNL-12, Fourth Edition, ASTM, April 1993. (Revision of STP 470B).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
E1159 − 98 (2009)
5.1.1 The purity of platinum, before alloying, for use in the of EMF vs. temperature as specified in the tolerance require-
positive thermoelement ofType R, S, and both thermoelements ment of the ordering information given in Section 4 and listed
of Type B shall be Grade 99.99, as specified in Specification in Table 1 of Specification E230.
B561. 5.8.1 Sample Length—The lengths of thermoelements to be
5.1.2 The purity of rhodium, before alloying, for use in the tested shall be approximately1m(3 ft.) taken from each end
positive thermoelement ofType R, S, and both thermoelements of the spool.
of Type B shall be Grade 99.95, as specified in Specification 5.8.2 Calibration Temperature—Unless otherwise specified
B616. with the order, the sample thermocouple shall be calibrated at
5.1.3 In the case of a conflict between the material compo- a single temperature of 1200 6 100 °C.
sition and the EMF output of the thermoelement, the calibra- 5.8.3 Alternative Calibration Method —A thermoelement
tion requirement o
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