BUCHI Rotavapo R-215 - Manual (Page 46)

6 Operation
46 R-210/215 Operation Manual, Version F
Δ T
2
(min. 20 °C)
Δ T
1
(min. 20 °C)
Fig. 6.5: 20-40-60 ° rule
6 .5 Distilling
To start operating the instrument, the following conditions have to be fulfilled:
• All electrical connections are established correctly.
• All sealings are inserted correctly.
• All joints are greased.
To start operating the instrument, proceed as follows:
• Switch on the instrument.
• Allow cooling water with a temperature not higher than 20 °C to flow through the condenser at
approx. 40–50 l/h.
• Set the heating bath temperature to the desired value as described above and wait, until the
heating medium has reached its operating temperature.
• Fill the solution you want to distill into the evaporating flask and make sure it does not exceed the
filling weight of 3 kg.
• Mount the evaporating flask.
NOTE
Choose the pressure in such a way that the boiling point of the solvent is 40 °C (see solvent table).
• Set the rotation speed.
NOTE
If the last distillation was an automatic one and you now want to carry out a manual distillation,
turn the knob for the rotation speed to its leftmost position first before setting the rotation speed by
turning the knob to the right. Otherwise the instrument will not start operating.
• Use the quick-action jack to submerge the flask into the bath.