BUCHI DuMaster D-480 - Manual (Page 191)

Operation Manual D-480 ©BÜCH Labortechnik AG
8 - Maintaining the instrument 191
 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 (on page 188). 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 (on page 171).
 Keep a tube extractor ready.
 Keep a filled ash finger ready. See Filling the combustion tube (on page 222).
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 Reduction tube plug
6 Reduction tube
Phase 1: Installing the ash crucible
Proceed as follows: