共查询到19条相似文献,搜索用时 109 毫秒
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全自动生化分析仪是根据光电比色原理来测量体液中某种特定化学成分的仪器。由于其测量速度快、准确性高、消耗试剂量小,现已在各级医院、防疫站、计划生育服务站得到广泛应用。目前全自动生化分析仪国家还没有检定规程及校准规范,笔者根据医药行业标准YY/T 0654—2008《全自动生化分析仪》和JJG 464—2011《半自动生化分析仪检定规程》,以日立公司生产的7180全自动生化分析仪为例探讨全自动生化分析仪(下称分析仪)的校准方法。 相似文献
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在医疗事业日益发展的今天,全自动生化分析仪由于灵敏度高、自动化程度好、速度快等优点而基本上取缔了半自动生化仪。卫生部临床实验室定量测定室内质量控制工作指南中明确指出测定临床样品的仪器按一定要求进行校准,但目前国家还没有专门统一的技术文件提供系统全面的校准方法,本文就将探讨一下全自动生化分析仪本身计量特性的校准方法及要求。 相似文献
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浅谈全自动生化分析仪的校准 总被引:1,自引:1,他引:1
全自动生化分析仪是临床诊断的重要手段之一 ,但其校准是计量工作的一个难点 ,国内也一直缺乏一个相对简单、可操作的校准方法。本文主要论述一种针对全自动生化分析仪的技术特点而设计探索的检测新方法———全自动生化分析仪的校准方法 相似文献
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全自动酶免分析仪广泛应用于各级医院及科研单位,本文是根据全自动酶免分析仪的结构和工作原理,为保证仪器检测结果的准确性和可靠性而制定的一套校准方法。 相似文献
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Reflectometer calibration without an open circuit 总被引:1,自引:0,他引:1
Chahine S.A. Huyart B. Achkar J. 《IEEE transactions on instrumentation and measurement》2003,52(5):1488-1493
This paper presents a convenient calibration technique of a six-port reflectometer requiring a set of loads including two standards and avoiding the use of an open circuit. This method has been applied for different reflectometers at three frequencies: 2, 33, and 94 GHz. Reflection coefficient measurement results obtained by this method and other calibration techniques prove its efficiency. Transmission coefficient measurement has also been performed at 94 GHz. Characterizations of some coaxial components by the heterodyne network analyzer using this technique and other calibration methods are presented at frequencies between 0.5 and 10 GHz. 相似文献
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Evaluation of Errors in Calibration Procedures for Measurements of Reflection Coefficient 总被引:1,自引:0,他引:1
《IEEE transactions on instrumentation and measurement》1978,27(4):354-358
Procedures for the calibration of computer-controlled network analyzers in reflection measurements are studied. The major aim of this paper is to develop an error analysis in order to define a quality factor, for evaluating the performances of a calibration procedure. This is done by using the invariance property of the cross ratio, which easily lets one obtain analytical expressions for the residual errors As an application of this technique, a comparison between two actual calibration procedures has been made using an automatic network analyzer. The experimental results favorably compare with the ones obtained on theoretical basis. 相似文献
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对于分析天然气中总硫含量的紫外荧光仪的检定及校准,我国尚未制定相应的检定规程或校准规范.参照已有的类似校准规范,结合紫外荧光总硫分析仪在天然气总硫含量检测方面的应用实际,提出评价总硫分析仪的校准项目和校准方法,包括示值误差、重复性、检测限和一致性等,并通过仪器校准实例及不确定度评定示例,验证了校准方法在相应仪器的可行性... 相似文献
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通过血细胞分析仪检定/校准装置的测量结果不确定度评定,确定检定/校准装置满足被检血细胞分析仪检定/校准的要求。可供需要建立血细胞分析仪检定/校准装置的相关单位中有关人员进行不确定度分析和计算时参考。 相似文献
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本文介绍水份测试仪检测装置的研究原理、不确定度分析和实测结果。该装置用于检定和校验各种水份测试仪器。其检测过程全部由计算机完成 ,操作方便 ,测量不确定度高。 相似文献
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Davis W.A. Bunting C.F. Bucca S.E. 《IEEE transactions on instrumentation and measurement》1992,41(2):286-290
The characterization of material parameters for dielectrics used in the construction of stripline and related structures is presented. The measured scattering parameters of transmission-line samples are used to predict the characteristics of the dielectric materials used in the construction in addition to effects due to rough dielectric-conductor interfaces. The measurements have been performed using a network analyzer with the `thru-reflect-line' calibration technique. The calibration process, the structure of the transmission-line sample, and the frequency-domain model are reviewed. Measured results are presented with predicted values for the dielectric constant and loss tangent of dielectric materials common in thick-film structures 相似文献