1.1 This test method uses one of two specific automatic particle counters (APCs) to count and measure the size of dispersed dirt particles, water droplets and other particulates, in light and middle distillate fuel, and bio fuels such as biodiesel and biodiesel blends, in the overall range from 4 m(c ) to 70 m(c) and in the size bands 4 m(c), 6 m(c) and 14 m(c) NOTE 1 ASTM specification fuels falling within the scope of this test method include Specifications: D975, D3699, D4814, D6751, D6985, D7467 and distillate grades of D396 and D2880. NOTE 2 For the purposes of this method, water droplets are counted as particles, and agglomerated particles are detected and counted as a single larger particle. Dirt includes biological particulates. Although the projected area of a particle is measured, this is expressed as the diameter of a sphere for the purposes of this method. NOTE 3 The notation (c), used with particle sizes, is used to denote that the apparatus has been calibrated in accordance with ISO 11171. Strictly this only applies to particles up to 50 m. NOTE 4 This test method may be used for particle sizes bands up to 70 m(c ), however the precision has only been determined for the size bands 4 m(c), 6 m(c) and 14 m(c) 1.2 Units -The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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 and health practices and determine the application of regulatory limitations prior to use.
Current gravimetric standards are do not account for contaminent particle size which can be more important than wieght of contaminants. In addition, this is an automatic test method and one that can be used in the laboratory or in the field.
KeywordsAutomatic particle counting: automotive diesel: biodiesel: gas oil: gasoline: kerosine: marine diesel: fuel cleanliness:
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
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