Buchi DuMaster D-480, Operation Manual

Page: 223 / 354

Operating instructions DuMaster D-480 ©BÜCHI Labortechnik AG
8 - Maintaining the instrument 223
Filling the post combustion tube
Note
Note the following rules:

Observe the filling heights indicated as exactly as possible.

The tube filling must not have any cavities. Therefore, tap the tube wall with a piece of wood or
cork when filling the tubes.

For filling use the furnished plastic tube with measuring marks to avoid sticking of residues of
filling material at the tube walls.
Safety instruction
Strictly observe the safety instruction "Filling reaction tubes" under
Warning notes during operation
(on page 24).
Filling the post combustion tube
The following picture shows the fillings and filling heights of the post combustion tube:
Legend:
1 Plug with embedded 3.3g brass wool
2 53g Regainer (126 mm)
3 Quartz wool (10 mm)
4,180 g CuO + 15 g Pt catalyst (167 mm)
5 Corundum balls (28 mm)
6 Wire mesh ronde
7 Spacer
Filling the post combustion tube
Proceed as follows:

Place the tube in the tube rack.

Insert the spacer.

Insert the wire mesh ronde.

Fill the chemicals through the plastic tube into the post combustion tube:

Fill in the corundum balls.

Pour the copper oxide (CuO) and Pt catalyst into two separate beakers - simultaneously
pour from the two beakers, so that a good mixture is developed.