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一、前言工业铂电阻广泛地用于工矿企业-200～500℃测温和控温,但是误差比较大。如果采用四引线双臂电桥来测量,对铂电阻的 R+0和α(或 W_(100))修正进行分度,以温度偏差内插法计算实际温度,即可实现精密测温。初步估计,此法与普通二次仪表测温法比较,可大大提高测量精度,适用于科研和工业试验现场及实验室精密测温,对于设备和仪器内部精密测温尤为优越。
I. Introduction Industrial platinum resistance is widely used in industrial and mining enterprises -200 ~ 500 ℃ temperature and temperature control, but the error is relatively large. If a four-lead, two-armed bridge is used for the measurement, the R + 0 and α (or W_ (100)) corrections for the platinum resistance are indexed and the actual temperature is calculated using the temperature deviation interpolation method to achieve precise temperature measurement. Preliminary estimates, this method compared with the ordinary secondary instrument temperature measurement, can greatly improve the measurement accuracy for scientific research and industrial test site and laboratory precision temperature measurement, precision equipment and instruments for the internal temperature is particularly superior.