1.1 本规程提供了应用标准、定义和补充信息，以帮助用户获得10以下有意义的真空电离计测量值 −1. 牛顿/米 2. (10 −3. torr）在空间模拟设施中。由于各种影响可以改变观察到的真空测量值，因此识别和评估潜在问题区域的方法受到了相当大的关注。该实践必须被视为信息性实践，因为不可能指定应用真空测量设备的方法来保证观察到的真空测量的准确性。 因此，用户的判断至关重要，因此，如果确定了问题区域，则可以采取适当的步骤将影响降至最低，酌情纠正观察到的读数，或注意观察中可能存在的错误。 1.2 虽然大部分讨论涉及热阴极电离计的应用，但不排除冷阴极设计。由于在热阴极测量仪方面有更多的经验，并且热阴极设备在大多数应用中都有使用，因此目前的重点是完全必要的。 1.3 以英寸-磅为单位的数值应视为标准值。英寸-磅单位的公制等价物可能是近似值。 1.4 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 provides application criteria, definitions, and supplemental information to assist the user in obtaining meaningful vacuum ionization gage measurements below 10 −1 N/m 2 (10 −3 torr) in space-simulation facilities. Since a variety of influences can alter observed vacuum measurements, means of identifying and assessing potential problem areas receive considerable attention. This practice must be considered informational, for it is impossible to specify a means of applying the vacuum-measuring equipment to guarantee accuracy of the observed vacuum measurement. Therefore, the user's judgment is essential so that if a problem area is identified, suitable steps can be taken to either minimize the effect, correct the observed readings as appropriate, or note the possible error in the observation. 1.2 While much of the discussion is concerned with the application of hot-cathode ionization gages, no exclusion is made of cold-cathode designs. Since a great deal more experience with hot-cathode gages is available and hot-cathode devices are used in the majority of applications, the present emphasis is fully warranted. 1.3 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents of inch-pound units may be approximate. 1.4 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.