Buchi DuMaster D-480, Operation Manual

Page: 188 / 354

Operating instructions DuMaster D-480 ©BÜCHI Labortechnik AG
8 - Maintaining the instrument 188

Place the ash crucible in the tube rack into the vent or else on a heat-resistant surface until it has
completely cooled down.

Protect the hot ash crucible from unauthorized access.

If there are any corundum balls sticking on the bottom of the ash crucible, top up some balls in
the combustion tube.
Installing the ash crucible
Note
The following section is a continuation of Removing the ash crucible. All steps described there must
already have been performed.
Process
The section is divided into the following phases:

Installing the ash crucible

Follow-up instrument preparation: Gas pressure / gas-tightness
Safety instruction
Strictly observe the safety instruction "Replacing the ash crucible/finger" under
Warning notes
during operation
(on page 24).
Requirements

The instrument must be in "Replace part" status. See instructions "Preparing the instrument, Gas
pressure" in Preparing and following up maintenance work.

Keep a tube extractor ready.

Keep a filled ash finger ready. See Filling the combustion tube.
Top view furnace
The following picture shows a top view of the furnace pulled out:
Legend:
1 Post combustion tube plug
2 Post combustion tube
3 Combustion tube connection
4 Combustion tube
5 Plug of Reductor
6 Reductor
Phase 1: Installing the ash crucible
Proceed as follows: