Determine the upper and lower limits of the verified
force range of the testing machine to be verified. In no case
shall the verified force range include forces below 200 times
the resolution of the force indicator.
10.2 If the lower limit of the verified force range is greater
than or equal to one-tenth of the upper limit, five or more
different verification forces shall be selected such that the
difference between two adjacent verification forces is greater
than or equal to one twentieth and less than or equal to
one-third the difference between the upper and lower limits of
the verified force range. One verified force shall be the lower
limit of the verified force range and another verified force shall
be the upper limit. (Fewer verification forces are required for
testing machines designed to measure only a small number of
discrete forces, such as certain hardness testers, creep testers,
etc.)
10.3 If the lower limit of the verified force range is less than
one-tenth the upper limit, verification forces shall be selected
as follows:
10.3.1 Starting with the lower limit of the verified force
range, establish overlapping force decades such that the maximum
force in each decade is ten times the lowest force in the
decade. The lowest force in the next higher decade is the same
as the highest force in the previous decade. The highest decade
might not be a complete decade.
10.3.2 Five or more different verification forces shall be
selected per decade such that the difference between two
adjacent verification forces is greater than or equal to one-
twentieth and less than or equal to one-third the difference
between the maximum and the minimum force in that decade.
It is recommended that starting with the lowest force in each
decade, the ratio of the verification forces to the lowest force in
the decade are 1:1, 2:1, 4:1, 7:1, 10:1 or 1:1, 2.5:1, 5:1,
google在线翻译是不准的，这个是ASTM E4中的一部分，谁有的话分享一下啊