Uncertainty propagation in the calibration equations for NTC thermistors

doi:10.1088/1681-7575/aaba8e

CIOMP OpenIR

	Uncertainty propagation in the calibration equations for NTC thermistors
	Liu, G.; Guo, L.; Liu, C. L.; Wu, Q. W.
	2018
发表期刊	Metrologia
ISSN	0026-1394
卷号	55 期号:3 页码:437-445
摘要	The uncertainty propagation problem is quite important for temperature measurements, since we rely so much on the sensors and calibration equations. Although uncertainty propagation for platinum resistance or radiation thermometers is well known, there have been few publications concerning negative temperature coefficient (NTC) thermistors. Insight into the propagation characteristics of uncertainty that develop when equations are determined using the Lagrange interpolation or least-squares fitting method is presented here with respect to several of the most common equations used in NTC thermistor calibration. Within this work, analytical expressions of the propagated uncertainties for both fitting methods are derived for the uncertainties in the measured temperature and resistance at each calibration point. High-precision calibration of an NTC thermistor in a precision water bath was performed by means of the comparison method. Results show that, for both fitting methods, the propagated uncertainty is flat in the interpolation region but rises rapidly beyond the calibration range. Also, for temperatures interpolated between calibration points, the propagated uncertainty is generally no greater than that associated with the calibration points. For least-squares fitting, the propagated uncertainty is significantly reduced by increasing the number of calibration points and can be well kept below the uncertainty of the calibration points.
关键词	uncertainty propagation NTC thermistor calibration equation Lagrange interpolation least-squares thermometers interpolation Instruments & Instrumentation Physics
DOI	10.1088/1681-7575/aaba8e
收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/61215
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Liu, G.,Guo, L.,Liu, C. L.,et al. Uncertainty propagation in the calibration equations for NTC thermistors[J]. Metrologia,2018,55(3):437-445.
APA	Liu, G.,Guo, L.,Liu, C. L.,&Wu, Q. W..(2018).Uncertainty propagation in the calibration equations for NTC thermistors.Metrologia,55(3),437-445.
MLA	Liu, G.,et al."Uncertainty propagation in the calibration equations for NTC thermistors".Metrologia 55.3(2018):437-445.

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