Maintenance, Cleaning And Diagnosis; Cleaning Of The Sintering Chamber And The Heating Elements - Ivoclar Vivadent Programat CS4 Operating Instructions Manual

7. Maintenance, Cleaning and Diagnosis

This chapter describes the user maintenance and cleaning procedures
for the Programat CS4. Only those tasks are listed that may be
performed by dental professionals. 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 process. No
foreign objects or dirt particles must be present in the sintering
chamber during the sintering, glazing or crystallization procedure.
Contaminations may be due to 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
(discolouration) of the object.
Contaminations resulting from chipping of the oxide layer can be
classified as follows:
Type of
contamination
Glass particles
Fine glass dust
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)
26
Indicator
The insulation of the lower part of the
furnace / the sinter tray rest shows residue
of clearly visible, glassy transparent
particles (see image a).
The insulation of the lower part of the
furnace and the cooling tray show residue
of fine glass dust. This type of
contamination 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 that, a
cleaning program (see 5.6.1) must be run. For this purpose, the
sintering chamber must be empty.
102
7.1.3 Cleaning of the heating elements
The cleaning program (see 5.6.1) restores 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 firing cycles may be necessary. For this purpose,
the sintering chamber must be empty.
Clean the sintering chamber prior to conducting the cleaning
program.
a)
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.