6.1.10.3 The bath temperature shall be maintained at the
required value and tolerance by a refrigeration unit or by the
use of suitable freezing mixtures, ensuring a homogenous
temperature in the bath by stirring or other means of agitation.
Table 1 lists the bath temperature set-points required in the
CFPP procedure. If only one bath is utilized, it must have the
ability to change down to the next lower set-point temperature
in a time period not exceeding 2 min 30 s.