From the manual P52:-
"Press Setup (F3) to set the Test Duration and
Pass/Fail limit. Use the arrow keys to highlight and set.
The pass/fail limit can be calculated whilst in this mode
by pressing Calc (F3). Enter the type and length of
cable and a new limit will be calculated. This can be
overridden by selecting the limit from the list. Press OK
(F4) when complete."