Special Programs - Ivoclar Vivadent Programat EP 5000 Operating Instructions Manual

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:
Item Frequency: Cleaning material:
Housing (9) and furnace if required
head (25)
Keypad (10) weekly
Cooling tray daily
(34)
Insulation (3) daily
Sealing rim of the furnace daily
head (2) and sealing
surface (1)
Firing plate if required

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 (duration: approximately 7 minutes).
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 heating muffle
(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. 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.
soft, dry cloth
soft, dry cloth
cleaning brush
cleaning brush
cleaning brush and
a soft cloth
Cleaning brush or vacuum
cleaner
The heater test should
only be conducted with
the empty firing cham-
ber, since an object in the cham-
ber (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
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 pixel.
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. The orientation of the
calibration sample (left or right) is not important.
4. If necessary, use the furnace
tongs to apply slight pressure
to the center of the calibration
base until the calibration sam-
ple 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 Stand-by
We recommend keeping the furnace head closed, particularly if the
temperature drops below 150 °C / 302 °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.
7.6 Press power calibration
32
The interval for press calibration
indicates after how many press
cycles a press power calibration
has to be conducted.