ASTM E1159-98(2003)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E 1159 – 98 (Reapproved 2003)
Standard Specification for
Thermocouple Materials, Platinum-Rhodium Alloys, and
Platinum
This standard is issued under the fixed designation E 1159; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope E 344 Terminology Relating to Thermometry and Hydrom-
etry
1.1 This specification covers non-insulated platinum-
rhodium alloys (weight percent composition), and platinum
3. Terminology
thermoelements that meet the requirement of Specification
2 3.1 Definitions—The definitions given in Terminology
E 230 and NIST Monograph 175.
E 344 apply to terms used in this specification.
1.2 This specification does not cover platinum and
3.2 Definitions of Terms Specific to This Standard:
platinum-rhodium materials, that require a higher purity than
3.2.1 thermocouple type, n—a nominal thermoelectric class
specified in 5.1, such as used for temperature coefficient of
of thermoelement materials that, used as a pair, have a
resistance (TCR) measurements or standards type calibration.
standardized relationship and tolerance between relative See-
For requirements of this superior quality, it is suggested that
beck EMF and temperature, physical characteristics, and an
suppliers of precious metals be contacted.
assigned type letter designator and color code.
1.3 This standard does not purport to address all of the
3.2.1.1 Discussion—Letter designators and color codes are
safety concerns, if any, associated with its use. It is the
defined in the United States by ANSI/ASTM E 230. Descrip-
responsibility of the user of this standard to establish appro-
tions of letter designators and color codes may also be found in
priate safety and health practices and determine the applica-
ASTM MNL-12.
bility of regulatory limitations prior to use.
4. Ordering Information
2. Referenced Documents
4.1 Orders for material under this specification shall include
2.1 The following documents of the issue in force on the
the following:
dateofmaterialpurchaseformapartofthisspecificationtothe
4.1.1 ASTM designation and date of issue,
extent referenced herein.
3 4.1.2 Thermocouple type (3.2.1),
2.2 ASTM Standards:
4.1.3 Thermoelement diameter and tolerance (5.5),
B 561 Specification for Refined Platinum
4.1.4 Annealing requirements (5.4),
B 616 Specification for Refined Rhodium
4.1.5 Quantity required (5.6, 5.7),
E 207 Test Method of Thermal EMF Test of Single Ther-
4.1.6 Specify standard or special tolerance on the initial
moelement Materials by Comparison With a Reference
value of EMF vs. temperature,
Thermoelement of Similar EMF-Temperature Properties
4.1.7 Calibration requirement (5.8),
E 220 Test Method for Calibration of Thermocouples by
4.1.8 Chemical analysis (7.2.1),
Comparison Techniques
4.1.9 Certified test results (7.2.2), and
E 230 Specification and Temperature-Electromotive Force
4.1.10 Statement of compliance (7.2.3).
(EMF) Tables for Standardized Thermocouples
5. Requirements
5.1 Purity—The purity of platinum for use in the negative
This specification is under the jurisdiction of ASTM Committee E20 on
thermoelement of Type R and Type S thermocouples shall be
Temperature Measurement and is the direct responsibility of Subcommittee E20.04
on Thermocouples.
Grade 99.99, as specified in Specification B 561.
Current edition approved Nov. 1, 2003. Published November 2003. Originally
5.1.1 The purity of platinum, before alloying, for use in the
approved in 1987. Last previous edition approved in 1998 as E 1159 – 98.
2 positive thermoelement ofType R, S, and both thermoelements
“Temperature-Electromotive Force Reference Functions and Tables for the
Letter-Designated Thermocouple Types Based on the ITS-90,” NIST Monograph of Type B shall be Grade 99.99, as specified in Specification
175 and Supplement 1. Available from NIST, U.S. Dept. of Commerce, Gaithers-
B 561.
burg, 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.
E 1159 – 98 (2003)
5.1.2 The purity of rhodium, before alloying, for use in the 5.8.1 Sample Length—The lengths of thermoelements to be
positive thermoelement ofType R, S, and both thermoelements tested shall be approximately1m(3 ft.) taken from each end
of Type B shall be Grade 99.95, as specified in Specification of the spool.
B 616.
5.8.2 Calibration Temperature—Unless otherwise specified
5.1.3 In the case of a conflict between the material compo-
with the order, the sample thermocouple shall be calibrated at
sition and the EMF output of the thermoelement, the calibra-
a single temperature of 1200 6 100 °C.
tion requirement of Specification E 230 shall govern.
5.8.3 Alternative Calibration Method—A thermoelement
5.2 Physical Condition—All material to be supplied shall
calibration versus a
...