9.2.1 Level Follower—For an automated distillation
apparatus, the level follower/recording mechanism of the
apparatus shall have a resolution of 0.1 volume % or better
with a maximum error of 0.3 volume % between the 5 and 100
volume % points. The calibration of the assembly shall be
verified in accordance with manufacturer’s instructions at
intervals of not more than three months and after the system
has been replaced or repaired.