1.1 本指南中描述的技术适用于包括滑环、可分离连接器、机电继电器或闭合开关触点等设备中的一个或多个电触点的电路。用户应确定其他设备的适用性。 1.2 所描述的技术范围适用于持续时间约为10纳秒到几秒的电路不连续性（间歇性），其大小足以引起电路功能的改变。使用合适的仪器可以将指南扩展到持续时间较短的事件。持续时间较长的事件可通过直流测量技术进行监测，如试验方法中所述 B539 或采用本指南中描述的方法。 1.3 本指南中描述的技术适用于承载信号电路典型电流的电路。 此类电流通常小于100 ma。这些技术可以扩展到承载更大电流的电路，但用户应首先评估适用性。 1.4 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熟悉所有危险，包括制造商提供的本产品/材料的适当安全数据表（SDS）中确定的危险，建立适当的安全、健康和环境实践，并在使用前确定监管限制的适用性。 1.5 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。 ====意义和用途====== 4.1 本指南提出了评估接触对在受到模拟或实际环境应力时的间歇性的技术。在预测这些应力条件下的电路性能和诊断这些条件下电路功能中观察到的问题时，此类测量是一种有价值的工具。 4.2 本文件旨在为检测、量化、表征和报告包含电触点的电路中的短时间歇提供一些通用指南。某些环境应力（如机械冲击、振动或温度变化）可能会导致间歇性故障。这些测量程序包括适用于在测试或服务中的各种条件下运行的触点的方法。 4.3 实践 B615 定义了测量滑动电触点中电接触噪声的方法。对比度指南 B854 为测量静态触点中类似现象的各种方法提供指导。

1.1 The techniques described in this guide apply to electrical circuits that include one or more electrical contacts in devices such as slip rings, separable connectors, electromechanical relays or closed switch contacts. The user should determine applicability for other devices. 1.2 The range of techniques described apply to circuit discontinuities (intermittences) of durations ranging from approximately 10 nanoseconds to several seconds and of sufficient magnitude to cause alteration of the circuit function. Extension of the guide to shorter duration events may be possible with suitable instrumentation. Events of longer duration may be monitored by techniques for dc measurements such as those described in Test Methods B539 or by adaptation of methods described in this guide. 1.3 The techniques described in this guide apply to electrical circuits carrying currents typical of signal circuits. Such currents are generally less than 100 ma. Extension of these techniques to circuits carrying larger currents may be possible, but the user should evaluate applicability first. 1.4 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 become familiar with all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use. 1.5 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 ====== 4.1 This guide suggests techniques to evaluate intermittences in a contact pair while it is subjected to simulated or actual environmental stress. Such measurements are a valuable tool in predicting circuit performance under these stress conditions and in diagnosing observed problems in circuit function under such conditions. 4.2 This document is intended to provide some general guidance on the best available practices for detecting, quantifying, characterizing and reporting short duration intermittences in circuits containing electrical contacts. Certain environmental stresses such as mechanical shock, vibration or temperature change may cause intermittences. These measurement procedures include methods applicable to contacts operating under various conditions in testing or in service. 4.3 Practice B615 defines methods for measuring electrical contact noise in sliding electrical contacts. In contrast Guide B854 provides guidance to the various methods for measuring similar phenomena in static contacts.