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《Instrument Standardization & Metrology》 2015-01
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Study on the Long-term Stability Test for Platinum Resistance Thermometer

Wu Chengshan;Chongqing Materials Research Institute;National Engineering Research Center for Instrument Functional Materials;  
As measurement standard instruments of quantity value transfer for ITS-90,the long-term stability of platinum resistance thermometer(PRT) is very important.This paper presents accelerated aging test formula and test method.The long-term stability was studied on standard platinum resistance thermometer(SPRT) with using accelerated aging test,test methods of the natural storage and under the condition of the actual usage.The results show that,the accelerated aging test method can be used to test the long-term stability of PRT or other thermometer.The Rtp changes little between the three different test methods,but the change of WZn reached 10 m K that caused by the accelerated aging test.
【CateGory Index】: TH811
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