一等铂电阻温度计标准装置智能检定系统

一等铂电阻温度计标准装置主要用于检定二等标准铂电阻温度计,检定程序繁琐、计算量大,迫切需要改进目前的装置,实现标准铂电阻温度计的智能检定。本文系统是对传统一等铂电阻温度计标准装置的智能升级,优化了标准铂电阻温度计的检定过程,能自动采集数据、自动处理数据,能生成证书内页及分度表。     

标准铂电阻温度计检定中的数据处理

一、概述 标准铂电阻温度计的检定是热工计量检定中的重要内容。我所经过多年努力,建立了一等标准铂电阻温度计检定装置,并于１９９９年１２月通过中国北京计量院的考核,该装置主要用于二等标准铂电阻温度计。一等标准水银温度计以及标准贝克曼温度计的检定。 我所建立的一等标准铂电阻温度计检定装置,其检定的温度范围是 ０～４１９ ５２７℃。除了水三相点瓶、退火炉等常规设备外,我们还建立了锌凝固点炉、水沸点炉。其中水沸点炉用于替代１９９０年国际温标（ＩＴＳ－９０）中所要求的锡凝固点炉。在水沸点（１００℃）采用比较法检…     

标准铂电阻温度计自动检定计算方法

根据国家计量定规程,针对标准铂电阻温度计自动检定的要求,设计出一套自动检定计算算法。该计算算法已用在实际的标准铂电阻温度计自动检定系统中,被证实时切实可用的。     

标准铂电阻温度计测量结果不确定度评定

本文以最常用的温度段（0-429．527）℃,以一等标准铂电阻温度计检定二等标准铂电阻温度计为例来分析标准铂电阻温度计的测量结果不确定度。     

基于标准铂电阻温度计的高精度测温仪的研制

标准铂电阻温度计是目前准确度最高的温度计．在-259．3567℃～961．78℃温度范围内．也是复现现行国际温标ITS-1990的标准仪器。在检定各种标准温度计和精密温度计量仪器时其作为标准器使用．也可以直接用于高精度测量。标准铂电阻温度计按工作等级划分为一等标准铂电阻温度计和二等标准铂电阻温度计。     

运用Excel进行标准铂电阻温度计的参数计算

文章对温度计量中主要标准仪器标准铂电阻温度计的重要参数计算方法进行分析,并运用Excel中的公式计算功能获得标准铂电阻温度计的各个参数,达到减少标准铂电阻检定工作中数据计算错误和提高工作效率的目的。     

标准铂电阻温度计使用技巧分析

标准铂电阻温度计是传递-189．3442℃～660．323℃温度范围内国际温标的内插仪器,很多企事业单位特别是计量、热工、电力等行业中经常使用0～429．527℃温区范围的二等标准铂电阻温度计（以下简称温度计）检定工业用铂热电阻或精密测温。     

精密型铂电阻温度计检定装置

本装置是为了适应一种实验室用精密型铂电阻温度计的分度而设计的。其温度范围是77K～430K，兼容了90温标的两个子温区；它可以同时检定长杆型和套管式铂电阻温度计。其用途除可检定精密型铂电阻温度计外，还可用于二等标准铂电阻温度计，标准铜-康铜热电偶．以及工业热电阻、     

用于标准铂电阻温度计检定的握手系统

标准铂电阻温度计的检定非常繁琐、计算量大,要实现标准铂电阻温度计的智能检定,必须建立检定系统和检定仪器之间的握手通讯。握手成功不仅能为自动检定系统的实现提供可能,还能有效防止原检定过程中手工操作转换开关的遗漏情况以及检定人员在电桥上读数读错的现象,极大地提高了工作效率,并能降低工作人员的劳动强度。     

标准铂电阻温度计的不确定度

一、引言标准铂电阻温度计的不确定度,是许多科技人员十分关心的问题。由于某些历史原因,JJG 160-75标准铂电阻温度计检定规程(简称《规程》) 并未给出有关的不确定度数据。因此,分析标准铂电阻温度计的各项误差,给出有关的不确定度数据,已成为一项急待解决的任务。参照国际计量局建议的表述实验不确定     

Improved High-Temperature Standard Platinum Resistance Thermometer

To prevent short circuits, to improve stability, and to raise the upper temperature limit to the freezing point of copper (1084.62 °C), the high-temperature standard platinum resistance thermometer (HTSPRT) was redesigned. The most important change was an improvement in the structure of the sensor support. The strip support was replaced by a new specially designed cross support. The structure and design of the new HTSPRT are briefly described in this article. The test results of a group of thermometers are presented. The test included long-term drifts of the thermometers at the triple point of water and freezing point of silver during a period of a few hundred hours operation at 1085 °C, the short-term stability of R (tpw) and W (Ag) in a period of 5 days, and thermal cycles between 22 °C and 1085 °C. The test results show that the thermometer performance is improved, and the new HTSPRT can operate up to the freezing point of copper.     

提高工业铂电阻温度计的测量准确度

本文介绍了一种通过计算特征系数和利用ACCESS数据库提高铂电阻温度计的测量准确度的方法。     

A Challenge to Improve High-Temperature Platinum Resistance Thermometer

High-temperature standard platinum resistance thermometers (HTSPRTs) are used to interpolate the international temperature scale of 1990 (ITS-90), especially for temperatures between the aluminum and the silver points. For this, long-term stability of the HTSPRT is essential. CHINO R800-3L type SPRT, which has a nominal resistance at the triple point of water (TPW) around 0.25 \(\Omega \), is the one developed earlier for the interpolation of the ITS-90 at this temperature range. Further development to this previous model has been carried out for the purpose of improving the thermal stability. The improvement was focused on reducing the effect coming from the difference in thermal expansion between platinum wire and the quartz frame on which the platinum wire is installed. New HTSPRTs were made by CHINO Corporation. Some series of tests were carried out at CHINO and at NMIJ. Initial tests after the HTSPRT fabrication were done at CHINO, where thermal cycles between \(500\,{^{\circ }}\hbox {C}\) and \(980\,{ ^{\circ }}\hbox {C}\) were applied to the HTSPRTs to see change in the resistances at the TPW \((R_{\mathrm{TPW}})\) and at the gallium point \((R_{\mathrm{Ga}})\). Repeated resistance measurements at the silver point \((R_{\mathrm{Ag}})\) were performed after completing the thermal cycling test. Before and after every measurement at silver point, \(R_{\mathrm{TPW}}\) was measured, while before and after every two silver point realization \(R_{\mathrm{Ga}}\) were measured. After completing this test, the HTSPRTs were transported to NMIJ, where the same repeated measurements at the silver point were done at NMIJ. These were then repeated at CHINO and at NMIJ upon repeated transportation among the institutes, to evaluate some effect due to transportation. This paper reports the details of the above-mentioned tests, the results and the analysis.     

关于标准铂电阻温度计的检定规程的修订

本文介绍标准铂电阻温度计规程修订的原因、依据和修订的内容以及要达到的目标。     

标准套管铂电阻温度计标准装置的不确定度评定

本文根据测量不确定度的评定方法,分析和计算了标准套管铂电阻温度计的不确定度,并对其开展的火箭发动机试验用低温热电偶的测量值的测量不确定度进行了评定。通过对标准装置和校准值的不确定度评定,掌握了标准套管铂电阻温度计标准装置及其开展的火箭发动机试验用低温热电偶的计量性能及误差来源,为国防计量标准的建立、运行与考核提供不确定度评定的依据。     

关于标准铂电阻温度计的检定规程的修订

本文介绍标准铂电阻温度计规程修订的原因、依据和修订的内容以及要达到的目标。     

铂丝位错特性对标准铂电阻温度计稳定性影响的研究

铂丝的位错是影响标准铂电阻温度计性能稳定性的重要因素之一。从微观角度出发,借助X射线衍射(XRD)分析方法,开展了退火时间对铂丝位错密度影响的研究,并利用标准铂电阻温度计退火实验数据进行了验证。结果表明:实际用于标准铂电阻温度计直径为0.07mm的新制铂丝(纯度99.999%)平均位错密度随着退火时间呈指数减小,经过100h退火后位错密度从1012cm^-2下降到1011cm^-2,300h后其位错密度基本保持稳定;新制标准铂电阻温度计在退火前300h其水三相点电阻值明显减小,退火300h后水三相点值变化量小于3mK并趋于平稳,此结果从热处理时间上与铂丝位错实验结果基本吻合。研究结果为标准铂电阻温度计制作工艺的提升及计量检定规程的修订提供技术支撑     

标准铂电阻温度计自动测温装置的实现

标准铂电阻温度计作为ITS-90国际温标中(-200～650)℃段的量值传递的标准设备,具有稳定的化学和物理特性和良好的复现性;keithley2000系列数表以其优良的性价比被广泛使用,本文讨论将二者相结合,编写相应的软件以实现标准铂电阻温度计的自动温度测量.     

Bilateral Comparison of Aluminum Fixed-Point Cells Using Standard Platinum Resistance Thermometer

The objective of Project EURAMET 1114 (Bilateral comparison of a freezing point of aluminum) in the field of thermometry is to compare realization of a freezing point of aluminum (660.323???C) between the Dutch national laboratory VSL and the Slovenian national laboratory MIRS/UL-FE/LMK using a long-stem 25 ?? standard platinum resistance thermometer (SPRT). Both laboratories had participated in a number of inter-comparisons on the level of EURAMET and also on BIPM CCT level (VSL). MIRS/UL-FE/LMK laboratory recently acquired a new fixed-point cell which had to be validated in the process of intercomparison. A quartz-sheathed SPRT was selected and calibrated at MIRS/UL-FE/LMK at the aluminum freezing point and at the water triple point. A second set of measurements was made on the same SPRT and at the same fixed points at VSL (NL). After its return, the SPRT was again recalibrated at MIRS/UL-FE/LMK. In the comparison the W value of the SPRT was used. The results of the internal and external intercomparisons confirmed that the new aluminum cell of the MIRS/UL/FE-LMK realizes a temperature that agrees with the VSL aluminum fixed point within the uncertainty limits of both laboratories. Furthermore, the results of this bilateral-comparison were compared with results that both laboratories achieved in the EURAMET K4 (Project 820) and were found to be in agreement.