Buchi E-800, Operation Manual

Page: 77 / 88

Büchi Labortechnik AG
Help with faults | 9
Operation Manual UniversalExtractor E-800 77/88
Problem Possible cause Action
Boiling retardation Incorrect positioning of the
beaker
u
Place the beaker directly
onto the heating plate.
Too long waiting time between
preparation of the instrument
and start
u
Start the instrument quickly
after solvent was added.
If dichloromethane is used
u
Use boiling aids, e.g. PTFE
boiling chips.
Dirty boiling surface
u
Replace beaker.
u
Use boiling aids, e.g. PTFE
boiling chips.
Worn boiling surface
No boiling Incorrect positioning of the
beaker
u
Place the beaker directly
onto the heating plate.
Beaker position is not active
u
Activate the beaker position.
Heater power is set too low
u
Adapt the heating power to
the ambient conditions
(temperature, level above
sea).
u
Choose correct solvent.
9.2 Draining solvent from extraction glass chamber universal
Navigation path
➔ ➔
[Service]
➔
[Actors]
➔
[Valves]
Precondition:
R Solvent remains in the extraction glass chamber.
R The lift is in the lower position.
R
The instrument has ambient temperature.
R A beaker is placed under the extraction glass chamber Soxhlet position.
u
Navigate to [Valves] via the navigation path.
ð The display shows the view
Valves
.
u
Select the position of the Soxhlet valve you wish to open.
u
Open the Soxhlet valve.
u
Wait until the extraction glass chamber is empty.
u
Close Soxhlet valve.