duration between the instant when an input quantity value of a measuring instrument or measuring system is subjected to an abrupt change between two specified constant quantity values and the instant when a corresponding indication settles within specified limits around its final steady value
ANNOTATION (informative) [2 December 2014] Here "quantity value(s)" can be replaced by "value(s)" in both instances without ambiguity: "duration between the instant when an input value of a measuring instrument or measuring system is subjected to an abrupt change between two specified constant values and the instant when a corresponding indication settles within specified limits around its final steady value".