ASTM-E230 2011
$82.33
E230/E230M-11e1 Standard Specification and Temperature-Electromotive Force (emf) Tables for Standardized Thermocouples
Published By | Publication Date | Number of Pages |
ASTM | 2011 | 189 |
ASTM E230/E230M-11e1
Historical Standard: Standard Specification and Temperature-Electromotive Force (emf) Tables for Standardized Thermocouples
ASTM E230/E230M
Scope
1.1 This specification contains reference tables (Tables 8 to 25) that give temperature-electromotive force (emf) relationships for Types B, E, J, K, N, R, S, T, and C thermocouples. These are the thermocouple types most commonly used in industry. The tables contain all of the temperature-emf data currently available for the thermocouple types covered by this standard and may include data outside of the recommended upper temperature limit of an included thermocouple type.
1.2 In addition, the specification includes standard and special tolerances on initial values of emf versus temperature for thermocouples (Table 1), thermocouple extension wires (Table 2), and compensating extension wires for thermocouples (Table 3). Users should note that the stated tolerances apply only to the temperature ranges specified for the thermocouple types as given in Tables 1, 2, and 3, and do not apply to the temperature ranges covered in Tables 8 to 25.
1.3 Tables 4 and 5 provide insulation color coding for thermocouple and thermocouple extension wires as customarily used in the United States.
1.4 Recommendations regarding upper temperature limits for the thermocouple types referred to in 1.1 are provided in Table 6.
1.5 Tables 26 to 45 give temperature-emf data for single-leg thermoelements referenced to platinum (NIST Pt-67). The tables include values for Types BP, BN, JP, JN, KP (same as EP), KN, NP, NN, TP, and TN (same as EN).
1.6 Tables for Types RP, RN, SP, and SN thermoelements are not included since, nominally, Tables 18 to 21 represent the thermoelectric properties of Type RP and SP thermoelements referenced to pure platinum. Tables for the individual thermoelements of Type C are not included because materials for Type C thermocouples are normally supplied as matched pairs only.
1.7 Polynomial coefficients which may be used for computation of thermocouple emf as a function of temperature are given in Table 7. Coefficients for the emf of each thermocouple pair as well as for the emf of most individual thermoelements versus platinum are included. Coefficients for type RP and SP thermoelements are not included since they are nominally the same as for types R and S thermocouples, and coefficients for type RN or SN relative to the nominally similar Pt-67 would be insignificant. Coefficients for the individual thermoelements of Type C thermocouples have not been established.
1.8 Coefficients for sets of inverse polynomials are given in Table 46. These may be used for computing a close approximation of temperature (°C) as a function of thermocouple emf. Inverse functions are provided only for thermocouple pairs and are valid only over the emf ranges specified.
1.9 This specification is intended to define the thermoelectric properties of materials that conform to the relationships presented in the tables of this standard and bear the letter designations contained herein. Topics such as ordering information, physical and mechanical properties, workmanship, testing, and marking are not addressed in this specification. The user is referred to specific standards such as Specifications E235, E574, E585/E585M, E608/E608M, E1159, or E2181/E2181M for guidance in these areas.
1.10 The temperature-emf data in this specification are intended for industrial and laboratory use.
1.11 Thermocouple color codes per IEC 584–3 are given in Appendix X1.
1.12 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.
1.13 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.
Keywords
emf computation; compensating extension wire; inverse polynomial; polynomial coefficient; reference tables; thermocouple; thermocouple extension wire; thermoelement; upper temperature limit: Calibration–thermocouples; Electromotive force (EMF) tables; Specifications; Tables (measurement); Temperature-electromotive force (EMF); Thermocouples–specifications
ICS Code
ICS Number Code 17.200.20 (Temperature-measuring instruments)
DOI: 10.1520/E0230_E0230M-11E01
PDF Catalog
PDF Pages | PDF Title |
---|---|
1 | Scope |
2 | Referenced Documents Source of Data Thermocouple Types and Letter Designations |
3 | Tolerances on Initial Values of Emf versus Temperature Color Coding List of Tables |
4 | Keywords X1. IEC COLOR CODE SYSTEM X1.1 General TABLE 1 |
5 | TABLE 2 TABLE 3 TABLE 4 |
6 | TABLE 5 TABLE 6 |
7 | TABLE 7 |
12 | TABLE 8 |
16 | TABLE 9 |
23 | TABLE 10 |
26 | TABLE 11 |
31 | TABLE 12 |
34 | TABLE 13 |
39 | TABLE 14 |
43 | TABLE 15 |
49 | TABLE 16 |
53 | TABLE 17 |
59 | TABLE 18 |
63 | TABLE 19 |
70 | TABLE 20 |
74 | TABLE 21 |
81 | TABLE 22 |
83 | TABLE 23 |
86 | TABLE 24 |
91 | TABLE 25 |
100 | TABLE 26 |
104 | TABLE 27 |
111 | TABLE 28 |
115 | TABLE 29 |
122 | TABLE 30 |
124 | TABLE 31 |
128 | TABLE 32 |
130 | TABLE 33 |
134 | TABLE 34 |
138 | TABLE 35 |
144 | TABLE 36 |
148 | TABLE 37 |
154 | TABLE 38 |
157 | TABLE 39 |
163 | TABLE 40 |
166 | TABLE 41 |
172 | TABLE 42 |
174 | TABLE 43 |
177 | TABLE 44 |
180 | TABLE 45 |
185 | TABLE 46 |
189 | TABLE |