Trace and definitions apply to either voltage orfrequency.NOTEChart marked at start of test.Actual instrument trace of function.Observed steady-state band (two linesparallel to the axis of chart movement,one each passing through the center pointsof maximum and minimum trace excursionrespectively during the short-term stabilitysample period, T@,Mean of observed band.Mean value at selected load.Mean value at no load.Prescribed steady-state band.Point at which trace initially leaves pre-scribed load band under condition ofdecrease in load.Point at which trace enters and remainswithin prescribed no load band.Point at which trace initially leavesprescribed no load band.Point at which trace enters and remainswithin prescribed load band.Regulation between any two loads.Surge after a load change.OvershootUndershootObserved recovery time, no load to load.Observed recovery time, load to no load.Maximum allowable recovery time.Maximum allowable recovery time, noload to load.Maximum allowable recovery time, loadto no loadPrescribed short-term sample time fordetermining stability.ME 6115-545-34/16-1Figure 16-1.Overshoot and Undershoot Chart Recording16-7
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