| Definition: | duration of the time interval after a stepwise change of the reference variable or a stepwise change of a disturbance variable beginning, when the controlled variable for the first time leaves a specified tolerance band, placed around the desired value of the controlled variable, and ending, when the controlled variable for the first time returns into this tolerance band SEE: Figure 11. Note 1 to entry: This entry was numbered 351-25-01 in IEC 60050-351:2006.
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