Page 23 of 85 Pages
Critical
settings have
been updated,
Please restart
machine in
order for
changes to be
updated
If a change of the autoclave
setting was made, a restart
operation is required.
Restart the autoclave in
order for changes to be
updated.
4.5
Description of Operation
4.5.1
Air removal
The autoclave is equipped with a vacuum pump for performing
the air removal stage. Before the sterilization stage, one or two
vacuum pulses (according to the cycle) are built in the chamber.
Removing air pockets in the autoclaved material improves the
penetration of the steam during the sterilization stage.
4.5.2
Heat `
The ELVPVG-D is equipped with a steam generator that
maintains a constant steam pressure. After a cycle has been
initialized and air removal stage has been completed, steam is
introduced into 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.
4.5.3
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.
4.5.4
Cooling (Optional)
The autoclave is designed to operate two liquid cooling cycles,
as follows:
Sealed bottles (cooling with compressed air)
On completion of 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 temperature of the liquids reaches the final set
temperature, the cooling stage is completed, flowing
water and compressed air is stopped, 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.
