4, Standard Sieve Opening Sizes, Plot data. 5, Sieve Number, (in), (mm), Size ( mm), % Passing. 6, 3", 3, , , %. 7, 2", 2, , 2, %. 8, /2". 33, 10, 2, 0. 34, 40, , 0. 35, , , 0. 43, Grain Size Distribution Curve Results: 44, % Gravel: D Cu: 45, % Sand: D Cc. Firstly, you use a graphics-editing-program to circle all particles in your SEM images (some programs offer the tool to do this task automatically, but you often to. Evaluation and presentation of grain sizedistribution. Bugfix: Edit grain size curve graphically, if hydrometer analysis was carried out to EN ISO -. 2, 1) Select software version installed on the SDG, Sieve Conversions, Sieve Conversions, Sieve Size 28, View Size Distribution CurveClick to View Particle. Product description for the GEOSYSTEM Grain Size Distribution Test program. A composite particle size distribution curve is built from sieve and hydrometer. A grain size distribution plot is a special purpose graph generally used to depict the results of a sieve analysis, commonly known as a "gradation test". The sieve analysis determines the gradation (the distribution of aggregate particles, by size, within a given sample) in order.