ASTM E1751 E1751M-2009e1 Standard Guide for Temperature Electromotive Force (emf) Tables for Non-Letter Designated Thermocouple Combinations《非字符表示热电偶用温度电动势(EMF)表的标准指南》.pdf
《ASTM E1751 E1751M-2009e1 Standard Guide for Temperature Electromotive Force (emf) Tables for Non-Letter Designated Thermocouple Combinations《非字符表示热电偶用温度电动势(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-2009e1 Standard Guide for Temperature Electromotive Force (emf) Tables for Non-Letter Designated Thermocouple Combinations《非字符表示热电偶用温度电动势(EMF)表的标准指南》.pdf(91页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: E1751/E1751M 091Standard 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.1NOTEUnits information and designation was corrected editorially in June 2009.1. Scope1.1 T
3、his guide consists of reference tables that givetemperature-electromotive force (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 thermoco
4、uple alloysuppliers should be consulted.1.3 The values stated in either SI units 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 sy
5、stems may result in non-conformancewith the standard.2. Referenced Documents2.1 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
6、Termi-nology E344.3.2 Definitions of Terms Specific to This Standard:3.2.1 matched pairs, na set of positive and negativethermoelements chosen so that a thermocouple fabricated fromthese thermoelements will match a specified temperature-elctromotive force relationship to within a specified tolerance
7、,at the time of first use.4. Source of Data4.1 The data in these tables are based 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 i
8、n millivolts to threedecimal places (1 V) at 1 C or 1 F intervals. Tables 17-20give emf values in microvolts to one decimal place (0.1 V) at1 C or 1 F intervals. If greater precision is required, refer tothe equation and coefficients listed for each thermocouplealloy.5. Significance and Use5.1 These
9、 thermocouple combinations have been developedfor specific applications by the wire manufacturer(s). If addi-tional information is required, consult ASTM MNL 12 or oneof the following thermocouple manufacturers: Carpenter Tech-nology, Engelhard Corp. Specialty Metals Div., Hoskins Mfg.Co., Johnson M
10、atthey, Sigmund Cohn Corp.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 tungsten26 % rhenium.6.1.2 Tungsten3 % rhenium versus tungsten25 % rhe-nium.6.1.3 Plati
11、nel II.46.1.4 KP versus gold0.07 % iron.56.1.5 Platinum5 % molybdenum versus platinum0.1 %molybdenum.6.1.6 Platinum40 % rhodium versus platinum20 %rhodium.1This guide is under the jurisdiction of ASTM Committee E20 on TemperatureMeasurement and is the direct responsibility of Subcommittee E20.04 on
12、Thermo-couples.Current edition approved June 1, 2009. Published December 2009. Originallyapproved in 1995. Last previous edition approved in 2000 as E 1751 00. DOI:10.1520/E1751_E1751M-09E01.2“Manual on the Use of Thermocouples in Temperature Measurement,” ASTMManual, 12, ASTM, 1993.3For referenced
13、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 ASTM website.4Trademark of Engelhard Corp., Specialty Metals Division.5Alloy compositions
14、are expressed in percentages by mass, except for thegold0.07 % iron alloy, which is given in atomic percent.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.1.7 Nickel18 % molybdenum versus nickel0.8 % co-balt.66.1.8 Iridium40 % rho
15、dium 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 established for the thermocouples in this guideexcept for the Tungsten3 % Rhenium versus Tun
16、gsten25 %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. These thermocouple combinationsare supplied typically as matched pairs.8. Table Information
17、8.1 The following is a list of emf versus temperature tablesincluded in this guide.Table Number Thermocouple Type Temperature RangeTable 1 Tungsten versus Tungsten26 % Rhenium 0 C to 2315 CTable 2 Tungsten versus Tungsten26 % Rhenium 32 F to 4200 FTable 3 Tungsten3 % Rhenium versusTungsten25 % Rheni
18、um0 C to 2315 CTable 4 Tungsten3 % Rhenium versusTungsten25 % Rhenium32 F to 4200 FTable 5 Platinel II 0 C to 1395 CTable 6 Platinel II 32 F to 2543 FTable 7 KP versus Gold0.07 % Iron 273 C to 7 CTable 8 KP versus Gold0.07 % Iron 459 F to 44 FTable 9 Platinum5 % Molybdenum versusPlatinum0.1 % Molybd
19、enum0 C to 1600 CTable 10 Platinum5 % Molybdenum versusPlatinum0.1 % Molybdenum32 F to 2912 FTable 11 Platinum40 % Rhodium versusPlatinum20 % Rhodium0 C to 1888 CTable 12 Platinum40 % Rhodium versusPlatinum20 % Rhodium32 F to 3430 FTable 13 Nickel18 % Molybdenum versusNickel0.8 % Cobalt50 C to 1410
20、CTable 14 Nickel18 % Molybdenum versusNickel0.8 % Cobalt58 F to 2570 FTable 15 Iridium 40 % Rhodium versus Iridium 0 C to 2110 CTable 16 Iridium 40 % Rhodium versus Iridium 32 F to 3830 FTable 17 Gold versus Platinum 0 C to 1000 CTable 18 Gold versus Platinum 32 F to 1832 FTable 19 Platinum versus P
21、alladium 0 C to 1500 CTable 20 Platinum versus Palladium 32 F to 2732 FTable 21 Polynomial Coefficients for the Computa-tion of Temperatures in C or F as aFunction of Thermocouple emf8.2 Tables 1-20 were derived from equations of the form:E 5 c01 c1T 1 c2T21 . cnTn(1)where:E = the emf in millivolts
22、(except for Tables 17-20 where Eis in 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 approximate values of temperature (T)ineither C or F for
23、 each thermocouple combination. Theinverse equations are of the form:T 5 b01 b1E 1 b2E21 . bnEn(2)except for the gold versus platinum thermocouple in theranges 209 C to 1000 C (408.2 F to 1832 F), where theinverse equation is of the form:T 5 b01(i 5 111bi SE 2 96457620DI(3)For these equations, the t
24、hermocouple 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. Keywords9.1 cobalt; coefficients
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