ajavahemik hetkest, millal mõõtevahendi või -süsteemi sisendsuuruse väärtust on järsult muudetud ühelt konstantselt väärtuselt teisele kuni hetkeni, millal vastav näit jõuab ettenähtud piiridesse püsiva lõppväärtuse ümbruses, 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, time interval between the instant when flow or temperature difference is subjected to a specified abrupt change and the instant when the response reaches 50 % of the step value, time required by insulation fault location equipment to respond under specified performance conditions, time from the instant of application of a specified change of the measurand until the output signal reaches and remains at its final steady value or within a specified interval centred on this value