BUCHI Multivapo P-12 - Manual (Page 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