1.1 本试验方法描述了旋转粘度计的校准（或性能验证），其中旋转元件在环境温度条件下浸入试验流体中。它不适用于锥板式或平行板式粘度计。 1.2 校准应使用牛顿标准物质，使用实验条件，如温度、粘度范围和剪切速率（转速），尽可能接近用于测量试样的条件。 1.3 以国际单位制表示的数值应视为标准值。 括号中给出的值是英寸-磅单位的数学转换，仅供参考，不被视为标准值。 1.3.1 泊（P）的常用粘度单位与国际单位制的等效关系为1 cP=1 mPa·s。 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和健康实践，并确定监管限制的适用性。 ====意义和用途====== 5.1 本试验方法可用于校准旋转粘度计及其相关旋转元件。 5.2 然后，可以使用以下公式获得试样的表观粘度（η） 等式4 :

1.1 This test method describes the calibration (or performance validation) of rotational viscometers in which the rotational element is immersed in the test fluid under ambient temperature conditions. It is not intended for cone-and-plate or parallel plate viscometers. 1.2 Calibration shall be performed with Newtonian reference materials using experimental conditions, such as temperature, viscosity range and shear rate (rotational speed), as close as practical to those to be used for measurement of test specimens. 1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard. 1.3.1 Common viscosity units of Poise (P) are related to the SI units by the equivalency 1 cP = 1 mPa·s. 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 5.1 This test method may be used to calibrate a rotational viscometer and its associated rotational element. 5.2 The apparent viscosity (η) of a test specimen may then be obtained using Eq 4 :