本文件描述了测量II/III/IV型增稠（AMS1428）飞机除冰/防冰液粘度的标准方法。非牛顿流体粘度的测定对剪切和样品室几何形状的差异非常敏感。即使是微小的差异也会对测量结果产生很大影响。本标准的试验参数和相关误差适用于Brookfield LV粘度计。应使用Brookfield LV或同等粘度计。为了被视为等效，备用粘度计必须证明在统计上等效的性能，即在使用相同的测试参数和条件测试增稠（AMS1428）液体时的精度和精密度。只有在满足布鲁克菲尔德LV粘度计精度和准确度的最低限值时，才能使用本标准所述范围之外的试验参数和条件。 为了比较粘度，应使用相同的试验参数和条件（包括主轴数、转速、样品体积和容器类型、样品温度和测量持续时间）。

This document describes a standard method for measuring the viscosity of thickened (AMS1428) Type II/III/IV Aircraft Deicing/Anti-icing Fluids.The determination of viscosity for a Non-Newtonian fluid is very sensitive to shear and differences in sample chamber geometry. Even slight differences can have a large effect on measurement results.The test parameters and associated error for this standard are applicable to the Brookfield LV viscometer. A Brookfield LV or equivalent viscometer shall be used. To be considered equivalent, an alternate viscometer must demonstrate statistically equivalent performance, i.e., accuracy and precision when testing thickened (AMS1428) fluids using the same test parameters and conditions.Test parameters and conditions outside of the ranges described within this standard may be used only if they meet minimum limits for precision and accuracy established for the Brookfield LV viscometer.To compare viscosities, the same test parameters and conditions (including spindle number, rotation speed, sample volume and container type, sample temperature, and measurement duration) shall be used.