鋼浴温度の連続測定に使用した熱電対の汚染に関する検討 : 溶鋼温度の連続測定について II

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In the first report (Tetsu-to-Hagane, 47 (1961) 11, p. 1982∿1988), the authors described the continuous immersion pyrometry method of molten steel in ladle and some results thereof. In order to establish this method, it was neccessary to keep the degree of contamination of thermocouple elements as low as possible. To obtain high accuracy of actual measurement, the contamination of every thrmocouple wires used for each measurements is studied by the measurement of the drop of e.m.f., the examination of the distribution of parasitic e.m.f. and the spectrographic analysis etc. And, the tentative method to caluculate the error which was appearing during the actual measurement was considered. The main results obtained by these studies were as follows : (1) Value of parasitic e.m.f. on the PtRh element is positive. This seems to be the characteristic of the contamination for this case. (2) The error which is appearing during actual measurement can be caluculated by the next formula : ⊿T=Σ__i{⊿T_i(E_<Pti>-E_<PtRhi)/1000F_i} (3) The degree of contamination of thermocouple elements depends on a temperature distribution along the wire, diameter of the wire, the insulating and protecting tube. (4) To attain to the lower degree of contamination on the thermocouple elements and the lower cost of measurement, it is better to use a wire of smaller diameter. (5) It is desirable to avoid the successive use of thermocouples for a high-accuracy measurement.
社団法人日本鉄鋼協会の論文
1962-02-01

鋼浴温度の連続測定に使用した熱電対の汚染に関する検討 : 溶鋼温度の連続測定について II

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