During initial start of an induction motor drive the motor flux has to be charged up.

An initial power-on value (iPOV) and a target power-on value (tPOV), which is to be reached at the end (H) of the acclimatization phase, may be programmed by an audiologist.

In the case that a setting mode must be chosen on initial activation, the standard mode or equivalent shall be chosen.

In this quest for precision, a portable timekeeper is subject to several natural phenomena liable to be detrimental to its initial rating.