Ivoclar Vivadent S1 - Manual (Page 25)

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7. Maintenance, Cleaning and Diagnosis
This chapter describes the user maintenance and cleaning procedures
for the Programat S1. All the other tasks must be performed by
qualified service personnel at a certified Ivoclar Vivadent Service
Center.
7.1 Cleaning of the sintering chamber and the heating
elements
7.1.1 Visual inspection of the sintering chamber
Inspect the sintering chamber visually prior to every sintering
procedure. No foreign objects or dirt particles must be present in the
sintering chamber during the sintering procedure.
Contaminations may be due to a chipping of the oxide / protective
layer of the heating element surface, among others. This type of
contamination may have an effect on the optical properties (discol-
ouration) of the sintered object.
Contaminations resulting from chipping-off of the oxide layer can be
classified as follows:
Type of
contamination Indicator
Glass particles The insulation of the lower part of the
furnace / the sinter tray rest shows residue
of clearly visible, glassy transparent
particles (see image a).
Fine glass dust The insulation of the lower part of the
furnace and the cooling tray show residue
of fine glass dust. This type of contamina-
tion is more difficult to discern.
7.1.2 Cleaning of the sintering chamber
Use the enclosed cleaning brush (102) for cleaning. Do not use
compressed air for cleaning under any circumstances. After cleaning,
conduct a cycle with the Program 1 (IPS e.max ZirCAD crowns) with
the firing chamber empty. In case of severe contamination it is rec-
ommended to conduct the cleaning program (see section 7.1.3).
7.1.3 Cleaning of the heating elements
The cleaning program recreates the chipped off oxide / protective
layer on the heating elements.
If no smooth protective layer is visible on the heating elements after
a cleaning firing, several subsequent cleaning firings may be
necessary. Do not place ZrO
2
objects in the furnace for these firings.
Clean the sintering chamber prior to conducting the cleaning
program.
If glass particles or fine glass dust are noticed during the visual
inspection, the sintering chamber needs to be cleaned (see section
7.1.2) and a firing cycle with Program 1 (IPS e.max ZirCAD crown)
must be conducted with an empty firing chamber. For this cycle, no
ZrO
2
objects must be placed in the furnace.
Large parts of the protective layer on the left heating element have
chipped off. The heating element on the right side is in a sound,
stable condition and shows an intact oxide / protective layer. The
cleaning program must be repeated until the surface is free from
contamination and appears glassy.
a)
102