ASTM D 8166 : 2017

Note 1:ASTM specification fuels falling within the scope of this test method include Specifications: D975, D1655, D3699, D7467, MIL-DTL-83133, MIL-DTL-5624, and distillate grades of D396 and D2880.

Note 2:For the purposes of this test method, water droplets are counted as particles, and agglomerated particles are detected and counted as a single larger particle. Dirt includes microbial particulates. Although the projected area of a particle is measured, this is expressed as the diameter of a circle for the purposes of this test method. The detector is unable to distinguish between dirt and water particles.

Note 3:The notation (c), used with particle sizes, is used to denote that the apparatus has been calibrated in accordance with ISO 11171. As per calibration specification of ISO 11171, (c) notation is required to distinguish from previous calibration standard ISO 4402, where (c) was not used.

Note 4:This test method may be used for particle sizes bands up to 70 µm(c), however the interim repeatability has only been determined for the size bands ≥4 µm(c), ≥6 µm(c), and ≥14 µm(c). All measurements are per millilitre.