Ivoclar Vivadent EP5000-G2 - Manual (Page 32)

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7.3 Special programs
Press the „cogwheel“ key, followed by the touch button „Special
Programs“.
Vacuum pump test program
With the program, the vacuum performance of the furnace vacuum
system can be automatically tested. For that purpose, the achieved
(minimum) pressure in mbar is measured and indicated. If the
pressure value is below 80 mbar (hPa), the vacuum performance of
the system is adequate.
Heater test
The quality of the heating muffle may be automatically checked by
means of the heater test (dura-
tion: approximately 7 minutes).
The heater test should
only be conducted with
the empty firing
chamber, since an object
in the chamber (e.g. firing tray)
may influence the test result.
Conduct the heater test
immediately after switching on the
furnace and before any actual firing procedures are conducted. If the
furnace is too hot, an incorrect heating muffle quality will be
indicated. If the heating element quality falls below 50 %, replacing
the heating element is recommended.
Cleaning program
The cleaning program is used to „clean“ the firing chamber
(duration: approximately 17 minutes). After a cleaning program, it is
recommended to calibrate the furnace. In case of problems with
discolouration of the ceramic, we recommend replacing the firing
table or the firing tray material.
Dehumidification program
The condensation of water in the insulation of the firing chamber
and the vacuum pump will result in a lower vacuum and thus to
impaired firing results. For that reason, the furnace head should be
kept closed when the furnace is switched off, in order to prevent the
absorption of humidity (condensate in the vacuum hose). Start the
dehumidification program if required (humidity in the insulation).
Keypad test
Each time the keypad is pressed, a short beep sounds. The keypad
test can be ended by pressing ESC.
7.2 Cleaning
The furnace may only be cleaned when it is cool, since
there is a burn hazard. Do not use any cleaning solutions.
The following parts have to be cleaned from time to time:
Display test (page 2 / 2)
Two different „chequer-board patterns“ are alternately shown on
the entire display. This allows the visual check of each individual pix-
el. The display test can be ended by pressing ESC.
7.4 Temperature calibration
1. Select the calibration program.
2. Remove the firing plate from
the furnace using the furnace
tongs and place it on the
cooling tray.
3. Carefully grip the upper part
of the ATK 2 using the furnace
tongs (Caution: Fracture risk
of the ceramic) and insert it
into the holes designated for
this purpose until it snaps into
place.
4. If necessary, use the furnace
tongs to apply slight pressure
to the center of the calibration
base until the calibration
sample clicks into place.
Observe the corresponding
markings.
5. Start the calibration program
6. At the end of the program,
open the furnace head and
carefully remove the ATK 2
using the furnace tongs and
place it on the cooling tray to
allow it to cool.
7. Replace the firing plate using
the furnace tongs.
8. Close the furnace head and select a firing program.
9. The ATK 2 can only be used once. Use a new calibration set for
the next calibration procedure.
7.5 Service note
When the service note (Hint 1700) appears for the first time, two
years have passed or the heating muffle has more than 1200 firing
hours. For that reason, Ivoclar Vivadent recommends to have the fur-
nace serviced. Please see your Equipment Service Pass for further
information. The interval until the next service note can be selected
once in the advanced settings (see Chapter 5.5.1.4).
7.6 Stand-by
We recommend keeping the furnace head closed, particularly if the
temperature drops below 100 °C / 212 °F. This will prevent
unintentional moisture absorption and formation of condensate in
the firing chamber. Consequently, vacuum problems are avoided and
the service life of the heating element is prolonged.
*Never clean with compressed air!
Item Frequency Cleaning material
Housing (9) and furnace)
head (25) if required soft, dry cloth
Keypad (10) weekly soft, dry cloth
Cooling tray L (34) daily cleaning brush *
Insulation (3) daily cleaning brush *
Sealing rim of the
furnace head (2) and
sealing surface (1) daily cleaning brush and a
soft cloth
Firing plate if required Cleaning brush or
vacuum cleander