Buchi Multivapo P-12 Bedienungsanleitung PDF herunterladen (Seite 44)

5 Putting into operation

44 Multivapor™ Operation Manual, Version E

5.6 Commissioning the Multivapor-Rotavapor edition

The T-piece is inserted between the condenser

and the receiving ﬂask of the rotary evaporator

and ﬁxed with the clip. The vacuum tube is con-

nected to the SVL 22 joint of the T-piece.

Fig. 5.28: Commissioning the Multivapor-Rotavapor edition

NOTE

As the system has to be closed in order to generate a vacuum, the vapor duct on the rotary evapo-

rator must be sealed with an empty ﬂask during operation.

5.7 Functional test

Once all of described installation steps have been completed proceed with the following functional test

to correctly operate the instrument.

5.7.1 Vacuum tightness test

NOTE

The vacuum tightness test can only be carried out with a vacuum controller installed or when a pres-

sure measuring device (manometer) is installed between the pump and the Multivapor.

1. Start the instrument and adjust the desired rotational speed, e.g. position 8.

2. Apply a vacuum of a preset value, e.g. 100 mbar.

3. Stop the vacuum and measure the pressure increase ∆p within 2 min.

4. The instrument is tight if ∆p < 10 mbar within 2 min.

To tighten the instrument, proceed as follows:

1. Close the vacuum tube from the vacuum pump to the condenser and check the leak rate of the

pump. In case of a leak consult the operation manual of the vacuum pump.

2. Close the vacuum tube at the vacuum tube side of the condenser with a blind cap and check the

leak rate of the condenser assembly. In case of a leak check the seals of the vacuum tube and the

GL-14 caps. Grease the glass joints if necessary.

3. Close the conical adapters of the vacuum cover using the blank adapters. In case of a leak

exchange the seals of the ribbed vacuum tube and/or the O-rings at the conical adapters. In case

of chemically affected O-rings, change the material of the O-rings according to Table 3-5.

4. Verify the quality of the sample tubes. They must not be chipped.

5. Check if the seals for the tube adapters are sound and correctly placed. In case of a leak exchange

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Buchi Multivapo P-12 Bedienungsanleitung Seite 44