Tuttnauer 2840 EL-D, Руководство по эксплуатации и техническому обслуживанию

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5 DESCRIPTION OF PROGRAMS
The sterilization cycle has a few stages in order to perform effective sterilization,
i.e. destroying the required amount of bacteria according to the relevant standards.
5.1 Water Inlet
Water is injected into the chamber until the water level electrode detects
that the required level is reached. Some time is added for a certainty before
proceeding to the heating stage.
5.2 Heat
After a cycle has been initialized, steam is produced within the chamber.
The temperature and pressure in the chamber increase until appropriate
levels are reached. Sensors located inside the chamber control the
temperature and pressure levels.
5.3 Sterilization
The sterilization temperature is factory set at 134
°
C (273
°
F) for
instruments and at 121
°
C (250
°
F) for liquids and other materials for which
this temperature is appropriate. These settings may be modified before
each cycle. When sterilization temperature is reached, the timed
sterilization cycle begins.
5.4 Exhaust
When the timed sterilization cycle is complete, the unit enters into the
exhaust stage, provided that a program other than the liquid program was
selected. The steam is exhausted from the chamber, bringing the internal
pressure down to atmospheric pressure.
5.5 Cooling
The autoclave is designed to operate two liquid cooling cycles, as follows:
5.6 Sealed bottles (cooling with compressed air)
After completing the sterilization stage, feed water starts flowing through
the cooling coil mounted around the outer side of the chamber.
Compressed air is injected inside the chamber and keeps a constant air
pressure to balance the internal pressure of the liquids inside the bottles.
Compressed air is passed through a 0.2µ microbiological filter. When the
temperature of the liquids reaches the final set temperature, the cooling
stage is completed, flowing water and compressed air is stopped and
pressure in the chamber goes down to atmospheric pressure.
At this stage, the door of the autoclave can be opened and the sterilized
materials can be taken out of the chamber.
5.7 Unsealed bottles (cooling without compressed air)
On completion of sterilization, steam is exhausted from the chamber at a
slow rate. When the chamber pressure decreases to atmospheric pressure,
water starts flowing through the cooling coil mounted around the outer
side of the chamber. On conclusion of the cycle the water flow is stopped
automatically, the process is completed and it is possible to open the door
and take the sterilized goods out of the chamber.