1.1 本规程涵盖了主粘度计和粘度油标准的校准，两者均可用于校准试验方法中所述的常规粘度计 D445 和规格 D446页 超过15℃的温度范围 °C至100 °C。 1.2 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 校准常数和运动粘度的国际单位制单位为毫米 2. /s 2. 和mm 2. /s、 分别。 1.3 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。 有关具体的警告声明，请参阅第节 7. . 1.4 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 因为主要标准之间存在表面张力或运动粘度差异，或两者都存在( 7.4 )和运动粘度标准( 7.5 )，使用主粘度计的特殊程序需要从一级标准的运动粘度“升压”到油标准的运动粘度。 5.2 使用根据本规程校准的主粘度计，操作员可以根据规范校准运动粘度计 D446页 . 5.3 使用本规程中建立的粘度油标准，操作员可以根据规范校准运动粘度计 D446页 .

1.1 This practice covers the calibration of master viscometers and viscosity oil standards, both of which may be used to calibrate routine viscometers as described in Test Method D445 and Specifications D446 over the temperature range from 15 °C to 100 °C. 1.2 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 The SI-based units for calibration constants and kinematic viscosities are mm 2 /s 2 and mm 2 /s, respectively. 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. For specific warning statements, see Section 7 . 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 Because there are surface tension or kinematic viscosity differences, or both, between the primary standard ( 7.4 ) and kinematic viscosity standards ( 7.5 ), special procedures using master viscometers are required to “step-up” from the kinematic viscosity of the primary standard to the kinematic viscosities of oil standards. 5.2 Using master viscometers calibrated according to this practice, an operator can calibrate kinematic viscometers in accordance with Specifications D446 . 5.3 Using viscosity oil standards established in this practice, an operator can calibrate kinematic viscometers in accordance with Specifications D446 .