一种超长杆铂电阻温度计校准装置

核电站所用的铂电阻温度计总长度超过3m,温度计的感温元件长度接近3m,常规的校准系统不能用于此类超长杆温度计的性能评估。介绍了一种用于核电站的超长杆铂电阻温度计的校准实验装置,通过实验验证,该系统的温度稳定性优于±0.015℃,水平和垂直温度均匀性分别优于0.05℃和0.02℃,标准不确定度和扩展不确定度分别为0.016℃和0.032℃,该实验系统可有效地评估长杆铂电阻温度计的性能。

Apparatus for the Performance Evaluation of Super Long Stem Platinum Resistance Thermometer in Nuclear Power Plant

Usually, the length of the platinum resistance thermometer for nuclear power plants is longer than 3meters, even the sensing element length of some thermometers is nearly 3meters. For this reason, the performance evaluation cannot be carried out with the common experimental systems. A special experimental system for these super long stem platinum resistance thermometers for nuclear power plants was designed. The performance of the experimental system was experimentally studied. The temperature stability of the experimental system is better than ±0.015℃. The horizontal and vertical temperature uniformity of the system are better than 0.05℃ and 0.02℃, respectively. The measurement uncertainty of the experimental system is 0.016℃, and the expanded uncertainty is 0.032℃, respectively. The results showed that the experimental system could be used to effectively evaluate the performance of the long stem platinum resistance thermometer.