A.8.1 If it is desired to determine the filtration time and not
the total solids content, perform the test by omitting steps A.6.1.i, A.6.1.j, A.6.1.k, and A.6.1.l.
A.8.2 If it is desired to determine the total solids content and
not the filtration time, use of the insert ring may be omitted. It is also
permissible, but not required, to use a control filter for a specific analysis
or a series of analyses. When this is accomplished, the procedures specified
in ASTM D5452 apply.