1.1 本试验方法通过高压火花测定空气中尘雾的最小点火能量。 1.2 尘云的最小点火能量（MIE）主要用于评估加工和搬运过程中发生点火的可能性。点火可能性用于评估预防措施的必要性，如防爆系统。MIE被确定为储存在电容器中的电能，当电容器作为高压火花释放时，刚好足以在空气中最容易点燃的浓度下点燃尘云。本标准中描述的实验室测试方法并没有优化影响MIE的所有测试变量。可以通过增加重复次数或优化每个测试粉尘的火花放电电路来确定较小的MIE值。 1.3 在本试验方法中，使用一系列MIE值在既定限值内的参考粉尘校准试验设备。 校准测试设备后，通过将其他粉尘的MIE值与参考粉尘或根据经验已知其点火灵敏度的粉尘进行比较，可以找到其他粉尘的相对点火灵敏度。 X1.1 本试验方法包括关于静电放电最小点火能量重要性的指南。 1.4 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 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。 第节给出了具体的预防说明 8. . 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。 ====意义和用途====== 5.1 本试验方法提供了进行实验室试验的程序，以确定尘云的最小点火能量。 注1: 有关气体和蒸汽，请参阅测试方法 E582 . 5.2 本试验方法得出的数据可用于评估尘雾的火花点火性。关于最小点火能量重要性的附加指南见 X1.1 . 5.3 获得的值特定于所测试的样品、所使用的方法和所使用的测试设备。这些值不被视为固有材料常数。 5.4 使用该程序测定的粉尘MIE可与参考粉尘的MIE（使用相同程序）进行比较，以获得粉尘对火花点火的相对灵敏度。了解火花点火的相对灵敏度可用于最小化火花点火引起爆炸的概率。

1.1 This test method determines the minimum ignition energy of a dust cloud in air by a high voltage spark. 1.2 The minimum ignition energy (MIE) of a dust-cloud is primarily used to assess the likelihood of ignition during processing and handling. The likelihood of ignition is used to evaluate the need for precautions such as explosion prevention systems. The MIE is determined as the electrical energy stored in a capacitor which, when released as a high voltage spark, is just sufficient to ignite the dust cloud at its most easily ignitable concentration in air. The laboratory test method described in this standard does not optimize all test variables that affect MIE. Smaller MIE values might be determined by increasing the number of repetitions or optimizing the spark discharge circuit for each dust tested. 1.3 In this test method, the test equipment is calibrated using a series of reference dusts whose MIE values lie within established limits. Once the test equipment is calibrated, the relative ignition sensitivity of other dusts can be found by comparing their MIE values with those of the reference dusts or with dusts whose ignition sensitivities are known from experience. X1.1 of this test method includes guidance on the significance of minimum ignition energy with respect to electrostatic discharges. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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. Specific precautionary statements are given in Section 8 . 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. ====== Significance And Use ====== 5.1 This test method provides a procedure for performing laboratory tests to determine the minimum ignition energy of a dust cloud. Note 1: For gases and vapors, see Test Method E582 . 5.2 The data developed by this test method may be used to assess the spark ignitibility of a dust cloud. Additional guidance on the significance of minimum ignition energy is in X1.1 . 5.3 The values obtained are specific to the sample tested, the method used and the test equipment used. The values are not to be considered intrinsic material constants. 5.4 The MIE of a dust as determined using this procedure can be compared with the MIE's of reference dusts (using the same procedure) to obtain the relative sensitivity of the dust to spark ignition. An understanding of the relative sensitivity to spark ignition can be used to minimize the probability of explosions due to spark ignition.