红外辐射温度计专用数字表的研制及评价

日本CHINO公司生产的IR-RST系列标准辐射温度计由于没有设计温度显示装置,无法实时显示温度,针对此类型温度计设计了一款专用的电压测量和温度显示,同时可提供24V直流电压的电测显示仪表。利用高等级的电压源和数字电压表,修正了本专用数字表的误差系数,并考核了稳定性,得到其最大相对误差不超过0.03%。与一款名义波长为0.65 μm的IR-RST辐射温度计配合使用,通过TG HT-9500型高温炉对其组合进行内插分度,实验结果证实分度后校准准确度优于0.03%,1 300 ℃时系统测量结果的扩展不确定度为0.62 ℃。

Development and Evaluation of Digital Meter for an Infrared Radiation Thermometer

The IR-RST standard radiation thermometers manufactured by CHINO Company, Limited, Japan, which can not display the temperature in real-time because the display unit hadn’t been designed. Therefore, an electrical measurement display device was designed which can measure the voltage, display the temperature and supply 24V DC voltage for this kind of infrared radiation thermometer. Calibrated a against high-level voltage power source and a voltmeter, the correction coefficients of the display instrument were got, the stabilitywas evaluated as well, the maximum relative error of voltage measurement can be achieved with in 0.03%. Assembled with a 0.65μm IR-RST radiation thermometer, it was calibrated against with a TG HT-9500 type high-temperature furnace as the source, the accuracy was better than 0.03% confirmed by the experimental results, and the extended uncertainty of the calibration system was 0.62℃ at 1 300℃.