1.1 本试验方法涵盖了环上块摩擦磨损试验机的校准和操作。 1.2 SI单位的数值应视为标准值。括号中给出的值是对SI单位的数学转换，仅供参考。 1.3 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。======意义和用途====== 5.1 本试验方法通过测量标定液在规定试验条件下的摩擦磨损性能，用于环上块试验机的标定。 5.2 该试验方法的用户应自行确定该试验程序的结果是否与现场性能或其他台架试验机相关。如果测试条件改变，磨损值可能会改变，流体的相对额定值可能会不同。

1.1 This test method covers the calibration and operation of a block-on-ring friction and wear testing machine. 1.2 The values in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only. 1.3 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. 1.4 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. ====== Significance And Use ====== 5.1 This test method is used for the calibration of a block-on-ring testing machine by measuring the friction and wear properties of a calibration fluid under the prescribed test conditions. 5.2 The user of this test method should determine to his or her own satisfaction whether results of this test procedure correlate with field performance or other bench test machines. If the test conditions are changed, wear values can change and relative ratings of fluids can be different.