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ASTM F312

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Standard Test Methods for Microscopical Sizing and Counting Particles from Aerospace Fluids on Membrane Filters

Published by	Publication Date	Number of Pages
ASTM	10/01/2016	4

Category: ASTM

Description

ASTM F312 – Standard Test Methods for Microscopical Sizing and Counting Particles from Aerospace Fluids on Membrane Filters

1.1 These test methods cover the determination of the size distribution and quantity of particulate matter contamination from aerospace fluids isolated on a membrane filter. The microscopical techniques described may also be applied to other properly prepared samples of small particles. Two test methods are described for sizing particles as follows:

1.1.1 Test Method A-Particle sizes are measured as the diameter of a circle whose area is equal to the projected area of the particle.