作为微量热计负载的热电传感器
Thermoelectric Sensors as Microcalorimeter Load
摘要：
在微量热计技术中，热电功率传感器现在可以代替测辐射热计用作传递标准。该替代方案具有对绝对温度不太敏感并且不受向下频率限制的技术优点。在INRiM，高频功率标准现在基于直流到34 GHz的同轴热电偶。采用改进的7 mm和3.5 mm同轴热电偶安装架实现了国家功率标准，在上述频率范围内的精度为0.03%~ 1%。
英文摘要：
Thermoelectric power sensors can now be used as transfer standards, instead of bolometers, in the microcalorimeter technique. This alternative has the technical advantages to be less sensitive to absolute temperature and not downward frequency limited. At INRiM the high frequency power standards are now based on coaxial thermocouples from dc to 34 GHz. Modified commercial thermocouple mounts in 7 mm and 3.5 mm coaxial line are used to realize the national power standard with an accuracy ranging from 0.03 % to 1 % in the mentioned frequency range.
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