Care and maintenance
62
Edition 01/2014
contrAA 600
7.5.3
Cleaning and changing the graphite tube
Clean the standard graphite tube
Daily
Work steps, see Chapter "Cleaning the graphite tube / cleanout" p. 43.
Clean the iridium-coated graphite tube
Daily
Work steps, see Chapter "Cleaning the graphite tube / cleanout" p. 43.
Evaporation of iridium coating in the graphite tube
After approx. 500 atomizations or for a new coating.
Work steps, see Chapter "Cleaning the graphite tube / cleanout" p. 43.
Replacing the graphite tube
If the graphite tube appears to be burnt, the pyrolytic coating is worn out.
At a formatting factor
≥
+10
%
an automatic temperature correction no longer takes place.
Further use of the graphite tube is limited. The graphite tube should be replaced.
Work steps, see Chapter "Inserting the graphite tube into the graphite tube furnace" p. 41.
7.5.4
Replacing the electrodes and the furnace jacket
If the electrodes have been cleaned and the graphite tube has been exchanged and the
formatting factor is still > 10 the electrodes and the furnace jacket must be replaced. You can
have the customer service perform these tasks as part of the annual maintenance.
If you wish to replace these parts yourself, you will need furnace tools which can be supplied
optionally.
1
Inserting tool for electrodes
2
Press-out tool
3
Inserting tool for furnace jacket
4
Face spanner
5
Ratchet wrench
Fig. 39
Furnace tools
1.
Switch on the contrAA 600 and start the ASpect CS software (the movable furnace
part must be pressurized to be opened/closed).
2.
In ASpect CS use
to open the
Furnace
/
Control
window.
3.
Open the furnace with the
[Open furnace]
button.
