1.1 本试验方法描述了模拟试验方法中遇到的油老化的台架程序 D7320 顺序IIIG发动机试验方法。然后，按照试验方法附录X1中顺序IIIGA发动机试验所述，测试这些老化油的运动粘度和低温可泵性 D7320 . 1.2 单位- 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。 1.2.1 例外情况- 第节中的某些设备没有SI等效物 6. ，还有一些数字将英寸单位视为标准单位。 1.3 本试验方法安排如下: 部分 范围 1. 参考文件 2. 术语 3. 试验方法总结 4. 意义和用途 5. 仪器 6. 试剂和材料 7. 危害 8. 新的和现有的试验台校准 9 程序 10 打扫 11 试验结果的计算和确定 12 汇报 13 精度和偏差 14 关键词 15 附件 ASTM测试监测中心:组织 附件A1 ASTM测试监测中心:校准程序 附件A2 ASTM测试监测中心:维护活动 附件A3 ASTM测试监测中心:相关信息 附件A4 反应容器 附件A5 反应容器封头 附录A6 反应容器至顶盖密封 附件A7 搅拌器涡轮叶片 附录A8 搅拌器填料压盖 附录A9 二氧化氮刻度管 附件A10 真空系统管道 附录A11 真空捕集器冷凝器 附录A12 设置真空控制阀 附录A13 附录 样品制备和添加 附录X1 充入液态二氧化氮 附录X2 二氧化氮精密针阀 附录X3 组装机器人装置示例 附录X4 帮助建立新机器人装置的信息包 附录X5 空气中稀释二氧化氮选项信息 附录X6 时间平均地下空气流量 附录X7 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。 第节给出了具体的警告声明 7. 和 8. . 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====== 5.1 本台架试验方法旨在产生与ASTM TMC序列IIIGA基质参考油434、435和438在序列IIIG发动机试验中老化后获得的油老化特性相当的油老化特性。 5.2 如果该方法产生的老化油与序列IIIG发动机试验中的老化油相当，则测得的运动粘度和MRV粘度的增加表明了油由于挥发和氧化而变稠的趋势，如序列IIIG和IIIGA中所示（见试验方法中的附录X1） D7320 )分别进行发动机测试。 5.3 该台架试验程序可能用于发动机润滑油的规格和分类，例如规格 D4485 . 5.4 只有在成功满足TMC机器人测试监测计划规定的校准要求的试验台上运行时，该测试方法的结果才在根据公布的规范寻求油的合格性时有效。

1.1 This test method describes a bench procedure to simulate the oil aging encountered in Test Method D7320 , the Sequence IIIG engine test method. These aged oils are then tested for kinematic viscosity and for low-temperature pumpability properties as described in the Sequence IIIGA engine test, Appendix X1 of Test Method D7320 . 1.2 Units— The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.2.1 Exceptions— There are no SI equivalents for some apparatus in Section 6 , and there are some figures where inch units are to be regarded as standard. 1.3 This test method is arranged as follows: Section Scope 1 Reference Documents 2 Terminology 3 Summary of Test Method 4 Significance and Use 5 Apparatus 6 Reagents and Materials 7 Hazards 8 New and Existing Test Stand Calibration 9 Procedure 10 Cleaning 11 Calculations and Determination of Test Results 12 Report 13 Precision and Bias 14 Keywords 15 Annexes ASTM Test Monitoring Center: Organization Annex A1 ASTM Test Monitoring Center: Calibration Procedures Annex A2 ASTM Test Monitoring Center: Maintenance Activities Annex A3 ASTM Test Monitoring Center: Related Information Annex A4 Reaction Vessel Annex A5 Reaction Vessel Head Annex A6 Reaction Vessel-to-Head Seal Annex A7 Agitator Turbine Blade Annex A8 Agitator Packing Gland Annex A9 Nitrogen Dioxide Graduated Tube Annex A10 Vacuum System Plumbing Annex A11 Vacuum Trap Condensers Annex A12 Setting the Vacuum Control Valve Annex A13 Appendixes Sample Preparation and Addition Appendix X1 Charging the Liquid Nitrogen Dioxide Appendix X2 Nitrogen Dioxide Precision Needle Valve Appendix X3 Example of an Assembled ROBO Apparatus Appendix X4 Information Package to Aid Setting Up a New Robo Apparatus Appendix X5 Dilute Nitrogen Dioxide in Air Option Information Appendix X6 Time-Averaged Subsurface Air Flow Rate Appendix X7 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific warning statements are given in Sections 7 and 8 . 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 ====== 5.1 This bench test method is intended to produce comparable oil aging characteristics to those obtained with ASTM TMC Sequence IIIGA matrix reference oils 434, 435, and 438 after aging in the Sequence IIIG engine test. 5.2 To the extent that the method generates aged oils comparable to those from the Sequence IIIG engine test, the measured increases in kinematic and MRV viscosity indicate the tendency of an oil to thicken because of volatilization and oxidation, as in the Sequence IIIG and IIIGA (see Appendix X1 in Test Method D7320 ) engine tests, respectively. 5.3 This bench test procedure has potential use in specifications and classifications of engine lubricating oils, such as Specification D4485 . 5.4 The results of this test method are valid when seeking qualification of oils against published specifications only when run on a test stand that has successfully met the calibration requirements specified under the TMC’s ROBO test monitoring program.