ASTM E1751/E1751M-15

Standard Guide for Temperature Electromotive Force (emf) Tables for Non-Letter Designated Thermocouple Combinations

SIGNIFICANCE AND USE
5.1 These thermocouple combinations have been developed for specific applications by the wire manufacturer(s). If additional information is required, consult ASTM MNL 12 or the wire manufacturer.
SCOPE
1.1 This guide consists of reference tables that give temperature-electromotive force (emf) relationships for special purpose, limited use, thermocouple combinations that do not have a letter designation.  
1.2 Extension wire or compensating extension wires are not covered by this guide. ASTM MNL 122 or thermocouple alloy suppliers should be consulted.  
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

General Information

• Status: Historical
• Publication Date: 30-Apr-2015
• ICS: 17.200.20 - Temperature-measuring instruments
• Technical Committee: E20 - Temperature Measurement
• Drafting Committee: E20.11 - Thermocouples - Calibration

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: E1751/E1751M − 15
Standard Guide for
Temperature Electromotive Force (emf) Tables for Non-
1
Letter Designated Thermocouple Combinations
ThisstandardisissuedunderthefixeddesignationE1751/E1751M;thenumberimmediatelyfollowingthedesignationindicatestheyear
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 3.1.1 For definitions of terms used in this guide see Termi-
nology E344.
1.1 This guide consists of reference tables that give
3.2 Definitions of Terms Specific to This Standard:
temperature-electromotive force (emf) relationships for special
3.2.1 matched pairs, n—a set of positive and negative
purpose, limited use, thermocouple combinations that do not
thermoelements chosen so that a thermocouple fabricated from
have a letter designation.
these thermoelements will match a specified temperature-
1.2 Extension wire or compensating extension wires are not
electromotive force relationship to within a specified tolerance,
2
covered by this guide.ASTM MNL 12 or thermocouple alloy
at the time of first use.
suppliers should be consulted.
4. Source of Data
1.3 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
4.1 The data in these tables are based on the SI Volt and the
each system may not be exact equivalents; therefore, each
International Temperature Scale of 1990.
system shall be used independently of the other. Combining
4.2 All temperature–electromotive force data in Tables 1-20
values from the two systems may result in non-conformance
have been developed from NIST, NRC, and wire manufactur-
with the standard.
ers’ data.
1.4 This international standard was developed in accor-
4.3 Tables 1-16 give emf values in millivolts to three
dance with internationally recognized principles on standard-
decimal places (1 µV) at 1°C or 1°F intervals. Tables 17-20
ization established in the Decision on Principles for the
give emf values in microvolts to one decimal place (0.1 µV) at
Development of International Standards, Guides and Recom-
1°C or 1°F intervals. If greater precision is required, refer to
mendations issued by the World Trade Organization Technical
the equation and coefficients listed for each thermocouple
Barriers to Trade (TBT) Committee.
alloy.
2. Referenced Documents
5. Significance and Use
3
2.1 ASTM Standards:
5.1 These thermocouple combinations have been developed
E344 Terminology Relating to Thermometry and Hydrom-
for specific applications by the wire manufacturer(s). If addi-
etry
tional information is required, consult ASTM MNL 12 or the
E696 Specification for Tungsten-Rhenium Alloy Thermo-
wire manufacturer.
couple Wire
6. Thermocouple Types
3. Terminology
6.1 Letter symbols have not been assigned. Identification is
3.1 Definitions:
made by alloy composition with the thermoelectrically positive
material listed first.
1
This guide is under the jurisdiction of ASTM Committee E20 on Temperature
6.1.1 Tungsten versus tungsten-26 % rhenium.
Measurement and is the direct responsibility of Subcommittee E20.11 on Thermo-
6.1.2 Tungsten-3 % rhenium versus tungsten-25 % rhe-
couples - Calibration.
nium.
Current edition approved May 1, 2015. Published June 2015. Originally
4
approved in 1995. Last previous edition approved in 2009 as E1751_ 6.1.3 Platinel II.
ε1
5
E1751M – 09 . DOI: 10.1520/E1751_E1751M-15.
6.1.4 KP versus gold-0.07 % iron.
2
“Manual on the Use of Thermocouples in Temperature Measurement,” ASTM
Manual, 12, ASTM, 1993.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Trademark of Engelhard Corp., Specialty Metals Division.
5
Standards volume information, refer to the standard’s Document Summary page on Alloy compositions are expressed in percentages by mass, except for the
the ASTM website. gold-0.07 % iron alloy, which is given in atomic percent.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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E1751/E1751M − 15
6.1.5 Platinum-5 % molybdenum versus platinum-0.1 %
Table 13 Nickel-18 % Molybdenum versus Nickel- −50 to 1410°C
0.8 % Cobalt
molybdenum.
Table 14 Nickel-18 % Molybdenum versus Nickel- −58 to 2570°F
6.1.6 Platinum-40 % rhodium versus platinum-20 % rho-
0.8 % Cobalt
dium. Table 15 Iridium 40 % Rhodium versus Iridium 0 to 2110°C
Table 16 Iridium 40 % Rhodium versus Iridium 32 to 3830°F
6.1.7 Nickel-18 % molybdenum versus nickel-0.8 % co-
6 Table 17 Gold versus Platinum 0 to 1000°C
balt.
Table 18 Gold versus Platinum 32 to 1832°F
6.1.8 Iridium-
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation: E1751/E1751M − 09 E1751/E1751M − 15
Standard Guide for
Temperature Electromotive Force (emf) Tables for Non-
1
Letter Designated Thermocouple Combinations
This standard is issued under the fixed designation E1751/E1751M; 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
ε NOTE—Units information and designation was corrected editorially in June 2009.
1. Scope
1.1 This guide consists of reference tables that give temperature-electromotive force (emf) relationships for special purpose,
limited use, thermocouple combinations that do not have a letter designation.
2
1.2 Extension wire or compensating extension wires are not covered by this guide. ASTM MNL 12 or thermocouple alloy
suppliers should be consulted.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
2. Referenced Documents
3
2.1 ASTM Standards:
E344 Terminology Relating to Thermometry and Hydrometry
E696 Specification for Tungsten-Rhenium Alloy Thermocouple Wire
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this guide see Terminology E344.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 matched pairs, n—a set of positive and negative thermoelements chosen so that a thermocouple fabricated from these
thermoelements will match a specified temperature-elctromotivetemperature-electromotive force relationship to within a specified
tolerance, at the time of first use.
4. Source of Data
4.1 The data in these tables are based on the SI Volt and the International Temperature Scale of 1990.
4.2 All temperature–electromotive force data in Tables 1-20 have been developed from NIST, NRC, and wire manufacturers’
data.
4.3 Tables 1-16 give emf values in millivolts to three decimal places (1 μV) at 1 °C1°C or 1 °F1°F intervals. Tables 17-20 give
emf values in microvolts to one decimal place (0.1 μV) at 1 °C1°C or 1 °F1°F intervals. If greater precision is required, refer to
the equation and coefficients listed for each thermocouple alloy.
5. Significance and Use
5.1 These thermocouple combinations have been developed for specific applications by the wire manufacturer(s). If additional
information is required, consult ASTM MNL 12 or one of the following thermocouple manufacturers: Carpenter Technology,
Engelhard Corp. Specialty Metals Div., Hoskins Mfg. Co., Johnson Matthey, Sigmund Cohn Corp.the wire manufacturer.
1
This guide is under the jurisdiction of ASTM Committee E20 on Temperature Measurement and is the direct responsibility of Subcommittee E20.04 on Thermocouples.
Current edition approved June 1, 2009May 1, 2015. Published December 2009June 2015. Originally approved in 1995. Last previous edition approved in 20002009 as
ε1
E 1751 – 00,E1751_E1751M – 09 which was withdrawn March 2009 and reinstated in June 2009. DOI: 10.1520/E1751_E1751M-09E01. DOI: 10.1520/E1751_E1751M-
15.
2
“Manual on the Use of Thermocouples in Temperature Measurement,” ASTM Manual, 12, ASTM, 1993.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E1751/E1751M − 15
6. Thermocouple Types
6.1 Letter symbols have not been assigned. Identification is made by alloy composition with the thermoelectrically positive
material listed first.
6.1.1 Tungsten versus tungsten−26 %tungsten-26 % rhenium.
6.1.2 Tungsten−3 %Tungsten-3 % rhenium versus tungsten−25 %tungsten-25 % rhenium.
4
6.1.3 Platinel II.
5
6.1.4 KP versus gold−0.07 %gold-0.07 % iron.
6.1.5 Platinum−5 %Platinum-5 % molybdenum versus platinum−0.1 %platinum-0.1 % molybdenum.
6.1.6 Platinum−40 %Platinum-40 % rhodium versus platinum−20 %platinum-20 % rhodium.
6
6.1.7 Nickel−18 %Nickel-18 % molybdenum versus nickel−0.8 %nickel-0.8 % cobalt.
6.1.8 Iridium−40 %Iridium-40 % rhodium versus iridium.
...