1.1 本规程涵盖了校准指定气体泄漏伪影的程序，该程序可用于确定泄漏探测器的响应，或在需要已知小流量气体的其他情况下。本规程的目的是使用最可能的可用设备，以尽可能简单的方式建立校准，而不参考其他校准泄漏。虽然与这些程序相关的不确定性很可能大于通过可追踪校准链获得的不确定性（约为10 %), 这些程序允许使用独立的方法从可疑历史的泄漏伪影中确定或验证泄漏率，或在无法追踪泄漏伪影时。 1.2 考虑两种类型的泄漏: 1.2.1 I型- 真空压力。 1.2.2 II型- 大气压力。 1.3 在每种参考泄漏类型下描述了三种校准方法: 1.3.1 方法A- 聚集比较，使用指定温度和压力条件下的已知体积气体作为参考。 1.3.2 方法B- 累积比较，使用使用方法a校准的泄漏伪影。 1.3.3 方法C- 在已知尺寸的毛细管中通过泄漏置换液塞。 1.4 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 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》中确立的国际公认标准化原则制定的。

1.1 This practice covers procedures for calibrating leak artifacts of a specified gas, that may be used for determining the response of leak detectors, or in other situations where a known small flow of gas is required. The purpose of this practice is to establish calibration without reference to other calibrated leaks in as straightforward a manner as possible using the likeliest available equipment. While the uncertainties associated with these procedures will most likely be greater than those obtained via traceable calibration chains (on the order of 10 %), these procedures allow independent means of establishing or verifying the leakage rate from leak artifacts of questionable history, or when traceable leak artifacts are not available. 1.2 Two types of leaks are considered: 1.2.1 Type I— Pressure to vacuum. 1.2.2 Type II— Pressure to atmosphere. 1.3 Three calibration methods are described under each type of reference leak: 1.3.1 Method A— Accumulation comparison, using a known volume of gas at specified conditions of temperature and pressure as a reference. 1.3.2 Method B— Accumulation comparison, using a leak artifact calibrated using Method A. 1.3.3 Method C— Displacement of a liquid slug, by the leak, in capillary tube of known dimensions. 1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered 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 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.