7 Starting and running a program
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7 Starting and running a program
♦
Check the sterilization parameters of the selected sterilizing program
(program, sterilizing temperature, sterilizing time and options).
♦
Check to see that the sealing surface on the door (2) and the door seal
(6) are clean.
♦
Close the door (2) until it touches the sterilizing chamber (8).
♦
Press the green START/STOP key (19).
The door is locked automatically (door indicator, 20). If the door cannot be locked,
the “Lock open” error message is displayed (see Chapter 12). Once the door is
locked, the sterilizing program starts.
If the timer is set and active, the indicator in the Timer key (23) will be lit. The
program cycle starts when the time set on the timer is reached.
If there is pressure in the jacket space, the feed water cannot be transported from
the feed water tank to the jacket space, unless the automatic feed water option is
present. This situation may occur if a program with a drying phase has been
completed immediately before or if a sterilization cycle has been interrupted. The
cycle display (16) will show a notice indicating that the system is waiting for the
proper jacket temperature (“Warten auf Manteltemp.”). Program execution will start
as soon as the jacket space has cooled and the pressure subsided.
The sterilizing chamber (8) is automatically heated and deaerated. The various
phases of the program are shown in the sterilization phase display (24) during
execution.
Assuming normal loading of the sterilizing chamber (8) with liquid sterilizing
articles, you will need a heating time of approximately 25 to 35 minutes. The
sterilizing chamber (8) will then have reached a temperature of 121 °C. While the
heater heats, the
▲
symbol is shown next to the chamber temperature in the
current values display (13).
Liquid sterilization requires an additional equilibration time of no more than 5
minutes until the medium has reached the sterilizing temperature. The length of the
equilibration time depends on the quantity of the liquid.
The actual sterilizing time will start once the sterilizing temperature has been
reached. If the media temperature control option is present, the sterilizing time in
the Liquids program does not start until the media temperature is equal to the
sterilizing temperature. The progress of the sterilizing time is indicated in the
current values display by the
▼
symbol next to the sterilizing time: The sterilizing
time counts down to zero in one-minute increments. If the media temperature
drops below the sterilizing temperature during the sterilizing phase, the sterilizing
time will be interrupted briefly.
When the sterilizing time is over, the sterilizing chamber (8) is automatically cooled
down through controlled release of steam.
