Hello,
I have encountered a situation where the grain size distribution curve plotted by gINT is reporting the incorrect D10 value, thus miscalculating the Cu value. I have uploaded a PDF copy of the curve. It appears that the D10 value should be approximately 0.095 as opposed to the report 0.044. Thus the Cu valus is miscalculated as 7.50 but it is my opinion that the correct value should be approximately 3.46.
Is this a user or programming error? I'm not exactly certain how it would be a user error but if so, what would be the correct steps to fix the D10 value? On all the rest of my grain size distribution curves, I have noticed this error on the D10 value. Is this common or possibly a glitch on this single particular sample?
Thank you for the feedback!
PDF
If you remove the hydrometer data, does it calculate the D10 correctly?
Yes. I also tried excluding the first two readings (2 minutes & 5 minutes). This worked for 1 sample but did not work for another sample.