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1955年NBS发布了热电偶热电势与温度关系的对照标准表格。它有一个缺点,就是热电势只有二或三位小数,并且没有计算公式。应用计算机时,可把完整的对照表贮存在计算机的记忆装置中,但是由于插值方法是任意的,插值不可能是唯一的,温度与热电势的关系中,存在不连续的点1968年修订了国际实用温标,把用来建立温标的各基准点温度作了必要的变动,国家管理委员会决定NBS是新的热电偶温度与热电势对照表的唯一制订者。这工作是值得纪念的,即对于七种热电偶完成了温度(摄氏和华氏)与热电势变换的经验公式和图表。ASTM发布了这些作为国家标准的对照表格,但是不包含图表。
1955 NBS published a thermocouple thermoelectric potential and temperature control of the standard form. One disadvantage is that the thermoelectric power has only two or three decimal places and there is no formula. When a computer is in use, a complete look-up table can be stored in a computer memory device. However, since the interpolation method is arbitrary, the interpolation may not be unique. There is a discontinuity in the relationship between temperature and thermoelectric power. 1968 Revised International practical temperature scale, the temperature used to establish the benchmark temperature made the necessary changes, the National Board of Management decided NBS is the new thermocouple temperature and thermoelectric power table is the only formulator. This work is memorable, that is, for seven thermocouples to complete the temperature (Celsius and Fahrenheit) and thermoelectric power conversion experience formula and chart. ASTM publishes these control charts as national standards, but does not include charts.