1.1 本指南概述了在屏蔽舱或非屏蔽区域设置核仪表校准设施的程序——分别为指南A和指南B。 1.2 本指南不试图描述校准技术或方法。假设熟悉仪表操作以及执行正确校准、维修和维护的人员将使用本指南。 1.3 本指南不试图说明与仪表相关的维护或维修程序。 1.4 以SI单位或英寸-磅单位表示的值应单独视为标准值。每个系统中陈述的值可能不完全等同；因此，每个系统应独立使用。合并两个系统的值可能导致不符合标准。1.5 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 1.6 本指南提供了一个有组织的信息集合或一系列选项，并不推荐特定的行动方案。本文件不能取代教育或经验，应结合专业判断使用。并非本指南的所有方面都适用于所有情况。本ASTM标准并不代表或取代必须判断给定专业服务是否充分的护理标准，也不应在不考虑项目的许多独特方面的情况下应用本文件。本文件标题中的“标准”一词已通过ASTM共识程序获得批准。 1.7 所有观察值和计算值应符合实践中制定的有效数字和四舍五入指南 D6026 . 1.7.1 本标准中用于规定如何收集、计算或记录数据的方法与数据在设计或其他用途中或两者中应用的准确性没有直接关系。如何应用使用该标准获得的结果超出了其范围。 1.8 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。======意义和用途====== 5.1 为核表面计建立适当的校准区域。 5.2 以减少校准不当的机会。 附注1: 本标准产生的结果的质量取决于执行该标准的人员的能力以及所用设备和设施的适用性。符合执业准则的机构 D3740 通常被认为能够胜任和客观的测试/检查等。本标准的使用者应注意遵守实践 D3740 本身并不能保证评估其中一些因素的方法。

1.1 This guide outlines procedures for setup of a nuclear gauge calibration facility in either a shielded bay or an unshielded area—Guide A and Guide B, respectively. 1.2 This guide does not attempt to describe the calibration techniques or methods. It is assumed that this guide will be used by persons familiar with the operations of the gauge and in performing proper calibration, service and maintenance. 1.3 This guide does not attempt to address maintenance or service procedures related to the gauge. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This guide offers an organized collection of information or a series of options and does not recommend a specific course of action. This document cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this guide may be applicable in all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this document be applied without consideration of a project’s many unique aspects. The word “Standard” in the title of this document has been approved through ASTM consensus process. 1.7 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in practice D6026 . 1.7.1 The method used to specify how data are collected, calculated, or recorded in this standard is not directly related to the accuracy to which the data can be applied in the design or other uses, or both. How one applies the results obtained using this standard is beyond its scope. 1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 To establish a proper calibration area for nuclear surface gauges. 5.2 To reduce the chance of improper calibration. Note 1: The quality of the results produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used. Agencies that meet the criteria of practice D3740 are generally considered capable of competent and objective testing/inspection/etc. Users of this standard are cautioned that compliance with practice D3740 does not in itself assure a means of evaluating some of those factors.