1.1 本试验方法包括在以下温度范围内测量润滑脂的表观粘度（单位:泊）−54 °C至38 °C(−65 °F至100 °F）。测量值限制在25 P至100 000 0.1时的P s −1. 和1 P至100 P在15 000 s −1. . 注1: 在非常低的温度下，剪切速率范围可能会减小，因为迫使润滑脂通过较小的毛细管需要很大的力。精度未低于10 s −1. . 1.2 本标准使用英寸-磅单位以及SI（可接受的公制）单位。首先说明的值应视为标准值。括号中给出的值仅供参考。毛细管尺寸以国际单位制表示 图A1.1 和 图A1.2 是标准的。 1.3 本试验方法使用水银温度计。 警告 -许多监管机构已将汞指定为一种危险物质，可导致严重的医疗问题。 汞或其蒸汽已被证明对健康有害，并对材料具有腐蚀性。处理汞和含汞产品时要小心。有关更多信息，请参阅适用的产品安全数据表（SDS）。当地或国家法律禁止销售汞或含汞产品，或两者兼有。用户必须确定其所在地销售的合法性。负责小组委员会，D02。G0继续探索替代品，以最终取代水银温度计。 1.3.1 此外，温度测量装置，如玻璃温度计（规范 E1 和 E2251 )可以使用热电偶、热敏电阻或铂电阻温度计，其精度和精度相当或更好，覆盖ASTM温度计49C的温度范围。 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。 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 表观粘度与剪切速率信息可用于预测恒定温度下稳态流动条件下润滑脂分配系统中的压降。

1.1 This test method covers measurement, in poises, of the apparent viscosity of lubricating greases in the temperature range from −54 °C to 38 °C (−65 °F to 100 °F). Measurements are limited to the range from 25 P to 100 000 P at 0.1 s −1 and 1 P to 100 P at 15 000 s −1 . Note 1: At very low temperatures the shear rate range may be reduced because of the great force required to force grease through the smaller capillaries. Precision has not been established below 10 s −1 . 1.2 This standard uses inch-pound units as well as SI (acceptable metric) units. The values stated first are to be regarded as standard. The values given in parentheses are for information only. The capillary dimensions in SI units in Fig. A1.1 and Fig. A1.2 are standard. 1.3 This test method uses mercury thermometers. WARNING —Mercury has been designated by many regulatory agencies as a hazardous substance that can cause serious medical issues. Mercury, or its vapor, has been demonstrated to be hazardous to health and corrosive to materials. Use caution when handling mercury and mercury-containing products. See the applicable product Safety Data Sheet (SDS) for additional information. The potential exists that selling mercury or mercury-containing products, or both, is prohibited by local or national law. Users must determine legality of sales in their location. The responsible subcommittee, D02.G0, continues to explore alternatives to eventually replace the mercury thermometers. 1.3.1 In addition, temperature measuring devices such as liquid-in-glass thermometers (Specifications E1 and E2251 ), thermocouples, thermistors, or platinum resistance thermometers that provide equivalent or better accuracy and precision, that cover the temperature range for ASTM thermometer 49C, may be used. 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. 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 Apparent viscosity versus shear rate information can be useful in predicting pressure drops in grease distribution systems under steady-state flow conditions at constant temperature.