Study of Pt/Pd Thermocouples in the Temperature Range 800 C up to 1500 C at the National Institute of Standards NIS-Egypt
(0) This paper concerns the performance of the Pd/Pt thermocouple in the range from 800 ℃ to 1500 ℃. The purity of the Pt wires is 99.997 % and the purity of the Pd wires is over 99.99+%. Three Pd/Pt thermocouple elements,constructed, thermally treated and characterized, they were calibrated at NIS by comparison with the laboratory linear pyrometer LP4. The emf-temperature reference function for platinum versus palladium (Pt/Pd) thermocouples for the investigated temperature range is presented. The reference temperature is based on the International Temperature Scale of 1990 (ITS-90). Experimental results are presented on the thermoelectric stability of Pt/Pd thermocouples at high temperatures and on the calibration of the Pt/Pd thermocouples at reference temperature. An expanded uncertainty (k=2) of the equivalent of 0.4 K of the measurements were obtained over the temperature range from 800 ℃ up to 1500 ℃.
Metrology Thermocouple Thermoelectric Radiation thermometer Uncertainty
M G Ahmed K Ali
National Institute of Standards-NIS, Giza, Egypt
国际会议
2008年国际温度与热物性测量会议(TEMP BEIJING 2008)
北京
英文
179-182
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）