热电偶温度与热电势对照表
热电偶经过一段时间的使用,由于热电极变质,热电势可能发生变化,判断热电偶变质的方法是:根据热电偶的色变程度就可以判断.例如铂铑-铂热电偶的热电极呈灰白色,有少量光泽,说明轻度变质,呈乳白色而没有光泽说明中度变色,呈黄色或硬化说明较严重变质,呈黄色,变脆,有麻面说明变质严重,由于铂铑-铂是贵重金属,对变质的电极可以用清洗和退火处理来回收使用.有例如镍铬-镍铝热电偶的热电极,变质时,由于程度不同,分别呈白色,黄色,绿色等颜色,对变质的镍铬-镍铝热电偶一般是剪去变质部分,重新焊接使用.若要看测量是否准确对照下列表格热电偶温度与热电势绝对毫伏数据对照表单位：毫伏(mV)温度(℃) 铂铑10&;am ot;铂S 镍铬&;am ot;镍硅K 镍铬&;am ot;铜镍E 铁&;am ot;铜镍J 铜&;am ot;铜镍T 铂铑30- 铂铑6B0 0 0 0 0 0 050 0.299 2.022 3.047 2.585 2.035 0.002100 0.645 4.095 6.137 5.268 4.277 0.033150 1.029 6.137 9.787 8.008 6.702 0.092200 1.440 8.037 13.419 10.777 9.286 0.178250 1.873 10.151 17.178 13.533 12.011 0.219300 2.323 12.207 21.033 16.325 14.860 0.431350 2.786 14.292 24.961 19.089 17.860 0.596400 3.260 16.395 28.943 21.846 20.869 0.786450 3.743 18.513 32.960 24.607 1.002500 4.234 20.640 36.999 27.388 1.241550 4.732 22.772 41.045 30.210 1.505600 5.237 24.992 45.085 33.096 1.791650 5.751 27.022 49.109 36.066 2.100700 6.274 29.128 53.110 39.130 2.430750 6.805 31.214 57.083 42.283 2.782800 7.345 33.277 61.022 45.498 3.154850 7.892 35.314 64.924 48.716 3.546900 8.448 37.325 68.783 51.875 3.957950 9.012 39.310 72.593 54.948 4.3861000 9.585 41.269 76.358 57.942 4.8331050 10.155 13.202 5.2971100 10.754 45.108 5.7771150 11.348 46.985 6.2731200 11.947 48.828 6.7831250 12.550 50.633 7.3081300 13.155 52.398 7.8451350 13.761 54.125 8.3931400 14.368 8.9521450 14.973 9.5191500 15.576 10.0941550 16.176 10.6741600 16.771 11.2571700 12.4261800 13.585
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