Buchi DuMaster D-480, Operation Manual

Page: 211 / 354

Operating instructions DuMaster D-480 ©BÜCHI Labortechnik AG
8 - Maintaining the instrument 211
Furnace area
The following picture shows the details of the furnace area:
Legend:
1 Bayonet catch
2 Handle
3 Connection Reductor
4 Ball valve fastening
5 Ground-in clamp
6 O
2
supply tube
7 Post combustion tube connection
Phase 2: Installing the Ni flap (continued)
Proceed as follows:

Push the furnace back:

Lift the bayonet catch (1) slightly so as not to damage the seal on the combustion tube
connection.

Close the bayonet catch by turning the bayonet catch handle (2) to the left.

Close the ground-in clamp (5,3) on the Reductor again.

Connect the post combustion tube (7) with the ground-in clamp (5) again.

Connect the O
2
supply tube with a ground-in clamp (5).

Close the front door.
Step 3:Follow-up instrument preparation, gas pressure / gas-tightness
After completing all maintenance work, put the instrument back into a state ready for measurement.
See "Follow-up preparation of the instrument: Gas pressure / tightness" in Preparing and following up
maintenance work.
To be observed after maintenance
If you have performed maintenance work that has a defined maintenance interval, you must manually
reset the "Status" field to zero on the "Maintenance intervals" dialog (accessible via
Options >
Maintenance > Intervals
. See Defining maintenance intervals in the software.
Removing, cleaning and re-installing the O2 lance
Note
The following section describes the maintenance of the O
2
lance.
Process
This maintenance work is always carried out together with the maintenance of the Ni flap. The steps
in Removing and cleaning the Ni flap are presumed for maintenance and removal of the O
2
lance.
Safety instruction
Strictly observe the safety instruction "Hot instrument parts" under
Warning notes during operation
(on page 24).