As correctly stated, most people have no idea how to use a CPL and they are wasting their money. It was designed for manual rotation by the photographer, to get the desired look required for the angle of the sun to the subject.
You just can't do...
Surely a "best guess" of the weight is good enough for purposes of a police report regarding attempted fraud. It's not like the exact weight makes a difference in the crime. Otherwise, just use what you found online and cite the source.