Buchi DuMaster D-480, Operation Manual

Page: 209 / 354

Operating instructions DuMaster D-480 ©BÜCHI Labortechnik AG
8 - Maintaining the instrument 209

Caution:
Tilting and jamming the combustion tube connection can damage the combustion tube.
Pull the combustion tube connection (3) out of the combustion tube with careful jiggling motions.

Place the combustion tube connection with Ni flap (3) on the tube rack.

Allow the flange to cool down to room temperature.
Phase 3: Cleaning the Ni flap
Proceed as follows:

Slowly pull out the O
2
lance.

Remove sooty particles from the metal surface by means of a wire brush. For cleaning the Ni flap
itself use a soft brush (e.g. toothbrush).

In case of heavy contamination, both sides must be cleaned. For this purpose remove the o-rings
and the O
2
lance.

Place the complete combustion tube connection with the Ni flap in ethyl alcohol or in a laboratory
cleaner (duration approx. 15 min).

Brush again the metal surface and the flap itself as described above.

Remove possible residues of ethyl alcohol with water and allow the combustion tube connection
to dry.

Insert the o-rings again.

Slightly grease the o-rings.

Insert the O
2
lance again.
Installing the Ni flap
Note
The following section is a continuation of "Removing the Ni flap". All steps described in "Removing the
Ni flap" must already have been performed. See: Removing and cleaning the Ni flap.