标准摘要
[中文适用范围]： 本部分IEC 60584规定了字母标识热电偶（R型、S型、B型、J型、T型、E型、K型、N型、C型和A型）的参考函数和公差。温度以基于1990年国际温标（ITS-90）的摄氏度（t90）表示，电动势（符号E）以微伏为单位。参考函数是多项式，将电动势E（单位为µV）表示为温度t90（单位为°C）的函数，热电偶参考接点温度为0°C。在附件A中列出了1°C间隔的电动势值。为了方便计算温度，在附件B中给出了表示温度与电动势关系的反函数，其精度在声明的范围内。本国际标准规定了按照本标准制造的热电偶的公差。公差值适用于制造好的热电偶，导线直径通常在0.13毫米至3.2毫米之间，交付给用户时，不包括使用过程中可能发生的校准漂移。附件C提供了关于选择热电偶的温度范围和环境的指导。 [外文原描述]： IEC 60584-1:2013 specifies reference functions and tolerances for letter-designated thermocouples (Types R, S, B, J, T, E, K, N, C and A). Temperatures are expressed in degrees Celsius based on the International Temperature Scale of 1990, ITS-90 (symbol t90), and the EMF (symbol E) is in microvolts. The reference functions are polynomials which express the EMF, E in V, as a function of temperature t90 in °C with the thermocouple reference junctions at 0 °C. Values of EMF at intervals of 1 °C are tabulated in Annex A. This third edition cancels and replaces the second edition published in 1995 and constitutes a technical revision. It includes the following changes: - IEC 60584-1:1995 and IEC 60584-2:1982 have been merged; - the standard is now explicitly based on the reference polynomials which express thermocouple EMF as functions of temperature. The tables derived from the polynomials are given in Annex A; - inverse polynomials expressing temperature as functions of EMF are given in Annex B, but inverse tables are not given; - the range of the polynomial relating the EMF of Type K thermocouples is restricted to 1 300 °C; - values of the Seebeck coefficients are given at intervals of 10 °C; - thermoelectric data (EMF and Seebeck coefficients) are given at the fixed points of the ITS-90; - some guidance is given in Annex C regarding the upper temperature limits and environmental conditions of use for each thermocouple type.
英文名称Thermocouples - Part 1: EMF specifications and tolerances