Digital BW, The Print

I'm at the point of entering densities from the 21 step wedge and am
using a scanner and PS CS to measure.  I've set the second info
palette to LAB but when moving over the each density it only shows
whole numbers and no decimal point in "L".  All the other QTR curves
are out to three decimal places.  Is there a way to get PS CS to read
that way?  I must be missing something.

Thanks,

Tom