1.1本试验方法涵盖一种实验室技术，该技术测量新的、使用过的或回收的绝缘油的稳定性，类似于规范D 3487中所述的在受控放电情况下的稳定性。当受到这种放电时，绝缘油吸收能量并产生气体以及电离分子（电荷载体）。可以测量这些衰变产物的数量，并可以指示油在本试验条件下的稳定性。 1.2气体保留在放电室中，并测量其压力。电荷载体保留在试样中。确定放电前后耗散因子的变化。 1.3以国际单位制表示的数值应视为标准。 括号中的数值仅供参考。 1.4本标准无意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和健康实践，并确定监管限制的适用性。 和中给出了具体的警示说明。 ====意义和用途====== 在该试验期间，真空电池中的绝缘油在两个电极之间经受高压放电。放电产生自由电子。这些电子与油分子碰撞，导致其中许多分子受到电子激发。其中一些分子以荧光辐射的形式失去了这种能量。 其他一些激发分子分解成气体、电离分子和自由基。这些变化可以指示油在本试验方法条件下的稳定性。这些变化的措施是增加试验室中的压力和增加试样的耗散因子。 在测试过程中，电池中的气体含量增加，油中的载流子浓度增加。

1.1 This test method covers a laboratory technique that measures the stability of new, used, or reclaimed insulating oils, similar to those described in Specification D 3487 in the presence of a controlled electric discharge. When subjected to this type of discharge, insulating oils absorb energy and produce gases as well as ionized molecules (charge carriers). The quantity of these decay products can be measured and can provide an indication of the stability of oils under the conditions of this test. 1.2 The gases are retained in the discharge cell and their pressure measured. The charge carriers remain in the test specimen. The change in the dissipation factor before and after the discharge is determined. 1.3 The values stated in SI units are to be regarded as the standard. The values stated in parentheses are for information only. 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 establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific cautionary statements are given in and. ====== Significance And Use ====== During this test, insulating oil in an evacuated cell is subjected to a high voltage discharge between two electrodes. The discharge generates free electrons. These electrons collide with the oil molecules causing many of them to become electronically excited. Some of these molecules lose this energy as a quanta of light emitting fluorescent radiation. Some of the other excited molecules decompose into gases, ionized molecules and free radicals. These changes can provide an indication of the stability of oils under the conditions of this test method. The measures of these changes are the increase of the pressure in the test cell and the increase in the dissipation factor of the test specimen. During the test, the gas content increases in the cell and the concentration of charge carriers increases in the oil.