IKA labworldsoft - Manual (Page 111)

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The illustration explains the fexIKA processing sequence:
Legend:
TH, TK, tS, tF: See the above text
HEIN, HAUS: Switch-on and switch-off point for heating
VEIN, VAUS: Switch-on and switch-off point for valve
The parameters 2 to 5 can be entered three times:
You can make separate settings for the first cycle, the last cycle, and the intermediate cycle. This is
advisable if, in the first cycle, you mix the sample with the solvent before pouring it into the extraction
vessel and if only a small quantity of solvent is present in the basic vessel in order to achieve the
reaspiration effect during cooling. A much shorter boiling time can be selected for the 1st cycle than
would otherwise be required if all of the solvent had to be evaporated beforehand.
The last cycle can be controlled separately so that, at the end of the process, a specific temperature
can be maintained or longer cooling can be performed to carry the residual heat away from the
system.