ASTM E1751 E1751M-2015 Standard Guide for Temperature Electromotive Force (emf) Tables for Non-Letter Designated Thermocouple Combinations《非文字表示热电偶组合用温度电动势 (emf) 表的标准指南》.pdf
《ASTM E1751 E1751M-2015 Standard Guide for Temperature Electromotive Force (emf) Tables for Non-Letter Designated Thermocouple Combinations《非文字表示热电偶组合用温度电动势 (emf) 表的标准指南》.pdf》由会员分享,可在线阅读,更多相关《ASTM E1751 E1751M-2015 Standard Guide for Temperature Electromotive Force (emf) Tables for Non-Letter Designated Thermocouple Combinations《非文字表示热电偶组合用温度电动势 (emf) 表的标准指南》.pdf(95页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: E1751/E1751M 15Standard Guide forTemperature Electromotive Force (emf) Tables for Non-Letter Designated Thermocouple Combinations1This standard is issued under the fixed designation E1751/E1751M; the number immediately following the designation indicates the yearof original adoption or,
2、 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. Scope1.1 This guide consists of reference tables that givetemperature-electromotive force
3、 (emf) relationships for specialpurpose, limited use, thermocouple combinations that do nothave a letter designation.1.2 Extension wire or compensating extension wires are notcovered by this guide. ASTM MNL 122or thermocouple alloysuppliers should be consulted.1.3 The values stated in either SI unit
4、s or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.2. Referenced Documents2.1
5、 ASTM Standards:3E344 Terminology Relating to Thermometry and Hydrom-etryE696 Specification for Tungsten-Rhenium Alloy Thermo-couple Wire3. Terminology3.1 Definitions:3.1.1 For definitions of terms used in this guide see Termi-nology E344.3.2 Definitions of Terms Specific to This Standard:3.2.1 matc
6、hed pairs, na set of positive and negativethermoelements chosen so that a thermocouple fabricated fromthese thermoelements will match a specified temperature-electromotive force relationship to within a specified tolerance,at the time of first use.4. Source of Data4.1 The data in these tables are ba
7、sed on the SI Volt and theInternational Temperature Scale of 1990.4.2 All temperatureelectromotive force data in Tables 1-20have been developed from NIST, NRC, and wire manufactur-ers data.4.3 Tables 1-16 give emf values in millivolts to threedecimal places (1 V) at 1C or 1F intervals. Tables 17-20g
8、ive emf values in microvolts to one decimal place (0.1 V) at1C or 1F intervals. If greater precision is required, refer tothe equation and coefficients listed for each thermocouplealloy.5. Significance and Use5.1 These thermocouple combinations have been developedfor specific applications by the wir
9、e manufacturer(s). If addi-tional information is required, consult ASTM MNL 12 or thewire manufacturer.6. Thermocouple Types6.1 Letter symbols have not been assigned. Identification ismade by alloy composition with the thermoelectrically positivematerial listed first.6.1.1 Tungsten versus tungsten-2
10、6 % rhenium.6.1.2 Tungsten-3 % rhenium versus tungsten-25 % rhe-nium.6.1.3 Platinel II.46.1.4 KP versus gold-0.07 % iron.56.1.5 Platinum-5 % molybdenum versus platinum-0.1 %molybdenum.6.1.6 Platinum-40 % rhodium versus platinum-20 % rho-dium.1This guide is under the jurisdiction of ASTM Committee E2
11、0 on TemperatureMeasurement and is the direct responsibility of Subcommittee E20.04 on Thermo-couples.Current edition approved May 1, 2015. Published June 2015. Originallyapproved in 1995. Last previous edition approved in 2009 as E1751_E1751M 091. DOI: 10.1520/E1751_E1751M-15.2“Manual on the Use of
12、 Thermocouples in Temperature Measurement,” ASTMManual, 12, ASTM, 1993.3For referenced ASTM standards, visit the ASTM website, 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 AST
13、M website.4Trademark of Engelhard Corp., Specialty Metals Division.5Alloy compositions are expressed in percentages by mass, except for thegold-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. Unit
14、ed States16.1.7 Nickel-18 % molybdenum versus nickel-0.8 % co-balt.66.1.8 Iridium-40 % rhodium versus iridium.6.1.9 Gold versus platinum.6.1.10 Platinum versus palladium.7. Tolerances on Initial Values of emf versusTemperature7.1 Tolerances on initial values of emf versus temperaturehave not been es
15、tablished for the thermocouples in this guideexcept for the Tungsten-3 % Rhenium versus Tungsten-25 %Rhenium, and that data can be found in Specification E696.When required, tolerances on initial values of emf versustemperature should be established by agreement between theconsumer and the producer.
16、 These thermocouple combinationsare supplied typically as matched pairs.8. Table Information8.1 The following is a list of emf versus temperature tablesincluded in this guide.Table Number Thermocouple Type Temperature RangeTable 1 Tungsten versus Tungsten-26 % Rhenium 0 to 2315CTable 2 Tungsten vers
17、us Tungsten-26 % Rhenium 32 to 4200FTable 3 Tungsten-3 % Rhenium versusTungsten-25 % Rhenium0 to 2315CTable 4 Tungsten-3 % Rhenium versusTungsten-25 % Rhenium32 to 4200FTable 5 Platinel II 0 to 1395CTable 6 Platinel II 32 to 2543FTable 7 KP versus Gold-0.07 % Iron 273 to 7CTable 8 KP versus Gold-0.0
18、7 % Iron 459 to 44FTable 9 Platinum-5 % Molybdenum versusPlatinum-0.1 % Molybdenum0 to 1600CTable 10 Platinum-5 % Molybdenum versusPlatinum-0.1 % Molybdenum32 to 2912FTable 11 Platinum-40 % Rhodium versusPlatinum-20 % Rhodium0 to 1888CTable 12 Platinum-40 % Rhodium versusPlatinum-20 % Rhodium3 to 34
19、30FTable 13 Nickel-18 % Molybdenum versus Nickel-0.8 % Cobalt50 to 1410CTable 14 Nickel-18 % Molybdenum versus Nickel-0.8 % Cobalt58 to 2570FTable 15 Iridium 40 % Rhodium versus Iridium 0 to 2110CTable 16 Iridium 40 % Rhodium versus Iridium 32 to 3830FTable 17 Gold versus Platinum 0 to 1000CTable 18
20、 Gold versus Platinum 32 to 1832FTable 19 Platinum versus Palladium 0 to 1500CTable 20 Platinum versus Palladium 32 to 2732FTable 21 Polynomial Coefficients for theComputation of Temperatures in C orF as a Function of Thermocouple emf8.2 Tables 1-20 were derived from equations of the form:E 5 c01c1T
21、1c2T21 cnTn(1)where:E = the emf in millivolts (except for Tables 17-20 where E isin microvolts), andT = the temperature in C or F. The coefficients used tocalculate each table are given at the end of the table.8.3 Table 21 gives coefficients of inverse equations that maybe used to compute approximat
22、e values of temperature (T)ineither C or F for each thermocouple combination. Theinverse equations are of the form:T 5 b01b1E1b2E21 bnEn(2)except for the gold versus platinum thermocouple in theranges 209 to 1000C (408.2 to 1832F), where the inverseequation is of the form:T 5 b01(i5111biSE 2 9645762
23、0DI(3)For these equations, the thermocouple emf (E) is in units ofmillivolts, except for gold versus platinum and platinum versuspalladium thermocouples, for which the emf is in units ofmicrovolts.8.3.1 Table 21 also gives the temperature range, emf range,and error range of each inverse equation.9.
24、Keywords9.1 cobalt; coefficients; gold; iridium; iron; molybdenum;nickel; palladium; platinel; platinum; polynomial; rhenium;rhodium; thermocouple; tungstenTABLE 1Tungsten versus Tungsten-26 % Rhenium ThermocouplesThermoelectric Voltage as a Function of Temperature (C), Reference Junctions at 0CC012
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