1.1 本试验方法 2. 涵盖150℃下油粘度的实验室测定 °C和1×10 6. s –1 在100 °C和1×10 6. s –1 ，使用高剪切速率锥形塞粘度计型号BE/C或BS/C。 1.2 牛顿校准油用于调整工作间隙和校准仪器。这些校准油的范围约为1.4 150 mPa·s至5.9 mPa·s（cP） °C和4.2 100 mPa·s至18.9 mPa·s（cP） °C。本试验方法不应用于外推至比用于校准仪器的牛顿校准油粘度更高的粘度。如果这样使用，精度语句将不再适用。仅针对粘度范围1.48确定了精度 在150°C和4.9℃下，mPa·s至5.07 mPa·s 100 mPa·s至11.8 mPa·s °C适用于精度部分中列出的材料。 1.3 使用非牛顿参考油检查工作条件是否正确。通过在不同实验室的许多仪器上进行测试，确定了适合每批这种油的准确粘度。该参考油的约定值可从欧洲协调理事会（CEC）CEC L-36-90监督小组主席或经销商处获得。 1.4 在制备本试验方法时，尚未确定对发动机机油以外产品的适用性。 1.5 以国际单位制表示的数值应视为标准值。本标准中不包括其他计量单位，但以下注明的计量单位除外。 1.5.1 例外情况- 本试验方法使用国际单位毫帕秒（mPa·s）作为粘度单位。(1 cP=1 mPa·s.） 1.6 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。 1.7 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 在本试验方法条件下测得的粘度被认为是在温度和剪切速率下的粘度的代表，而不是在运行条件下内燃机滑动轴承中的压力。 5.2 这些条件与发动机测量的相关性- 许多出版物都讨论了机油粘度。 6. 5.3 该剪切速率下的高温高剪切（HTHS）粘度可以使用该仪器在其他温度下测量。这是通过使用不同范围的牛顿校准液来实现的。对于精度部分未提及的任何温度或粘度范围，尚未研究精度。

1.1 This test method 2 covers the laboratory determination of the viscosity of oils at 150 °C and 1 × 10 6 s –1 and at 100 °C and 1 × 10 6 s –1 , using high shear rate tapered-plug viscometer models BE/C or BS/C. 1.2 Newtonian calibration oils are used to adjust the working gap and for calibration of the apparatus. These calibration oils cover a range from approximately 1.4 mPa·s to 5.9 mPa·s (cP) at 150 °C and 4.2 mPa·s to 18.9 mPa·s (cP) at 100 °C. This test method should not be used for extrapolation to higher viscosities than those of the Newtonian calibration oils used for calibration of the apparatus. If it is so used, the precision statement will no longer apply. The precision has only been determined for the viscosity range 1.48 mPa·s to 5.07 mPa·s at 150 °C and from 4.9 mPa·s to 11.8 mPa·s at 100 °C for the materials listed in the precision section. 1.3 A non-Newtonian reference oil is used to check that the working conditions are correct. The exact viscosity appropriate to each batch of this oil is established by testing on a number of instruments in different laboratories. The agreed value for this reference oil may be obtained from the chairman of the Coordinating European Council (CEC) Surveillance Group for CEC L-36-90, or from the distributor. 1.4 Applicability to products other than engine oils has not been determined in preparing this test method. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard except those noted below. 1.5.1 Exception— This test method uses the SI unit millipascal-second (mPa·s) as the unit of viscosity. (1 cP = 1 mPa·s.) 1.6 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. 1.7 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 Viscosity measured under the conditions of this test method is considered to be representative of that at the temperatures and shear rates but not the pressures in the journal bearings of internal combustion engines under operating conditions. 5.2 The relevance of these conditions to the measurement of engine-oil viscosity has been discussed in many publications. 6 5.3 The high temperature high shear (HTHS) viscosity at this shear rate can be measured at other temperatures using this apparatus. This is achieved by the use of a different range of Newtonian calibration fluids. The precision has not been studied for any temperature or viscosity range not noted in the precision section.