摘 要：工業(yè)鉑電阻具有測溫準確，穩(wěn)定性好等優(yōu)點。但在實際使用中許多A級鉑電阻測溫準確度并不高，這主要是因為分度表的選用不當造成的。為滿足高精度測量的要求，我們研究了鉑電阻的測溫特性，給出一種鉑電阻精確測溫的方法：通過校準確定鉑電阻的測溫特性，用特性公式計算溫度。該方法具有較強的實用性、推廣性。 關鍵詞：工業(yè)鉑電阻；分度表；測溫特性；測溫準確度；測量方法 中圖分類號：TP212.11 文獻標識碼：A 文章編號：1672-4984（2007）04-0050-03 An accurate measurement method for platinum resistance ZHU Yu-hong （National Institute of Measurement and Testing Technology，Chengdu 610021，China） Abstract: PRT has many merits such as high measurement accuracy, good stability and so on. However, the accuracy of grade a PRT is not high enough because of the indexing table. For contenting the demands of highly accuracy measurement fields, the author studied the temperature characteristics of PRT and suggested a method of improving the measurement accuracy of PRT by measuring temperature according to the characteristics formula of PRT. This method is practical.
Key words: Industrial PRT; Indexing table; Measurement accuracy； Temperature characteristics； Method of measurement
