Buchi Rotavapo R-220 SE Manual do Utilizador descarregar pdf (Página 64)

5 Putting into operation

64 R-220 SE Operation Manual, Version F

NOTICE

Risk of instrument damage by wrong mains supply.

• External mains supply must meet the voltage given on the type plate

• Check for sufﬁcient grounding

5.18 Adjusting the snap ﬂange

System tightness is essential when working with a Rotavapor. Thus, the snap ﬂange assembly should

be checked at every evaporating ﬂask installation. This is necessary since every glassware has its

unique ﬁtting accuracy.

Clockwise = increasing the tension

Counterclockwise = decreasing the tension

• When passing the top dead center of the closing mechanism a clear resistance must be felt.

• Moving the lever must never require excessive force!

➡ If the required lever force is too weak the ﬂange may not be thight and will wear out the PTFE seal.

In this case, increase the tension of the closure.

➡ If the required lever force is too high (e.g. the lever can not be shifted over the top dead center)

reduce the tension of the closure.

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Buchi Rotavapo R-220 SE Manual do Utilizador Página 64