Tuttnauer 2301006, Руководство по эксплуатации и техническому обслуживанию, Страница: 41 / 122

Page 36 of 117 pages
Program 13 "Bowie & Dick Test”
This program is intended to test residual air in the chamber. The parameters
are locked in such a way that they can not be changed. These are the
parameters:
♦
Sterilization temperature 274ºF
♦
Sterilization time 3.5 mins.
♦
Drying period of 2 mins.
Performance description:
Residual air
is displaced due to 4 vacuum pulses (down to 25 kPa) and 3
steam pulses up to 199 kPa . The 4th vacuum pulse is followed with
introducing saturated (controlled) steam into the chamber to the required
sterilization temperature.
Sterilization period is controlled in such a way that the sterilization
temperature will not drop belowthe required temperature, neither will increase
by more than 37.4 ºF. The saturated steam conditions are controlled in such a
way that the fluctuation of pressure does not allow a drop below1kPa, neither
an increase of 3 kPa above the high limit of the Ste. Temperature.
Fast exhaust stage is performed by discharging rapidly the pressure from the
chamber. When the pressure reaches a level of 115 kPa the vacuum pump is
activated till a pressure drop to 25 kPa.
Drying is achieved by evacuating the vapor from the chamber in
"under-pressure” phase along a period of 5 minutes.
Pressure equilibration . To enable the door to be opened, air is introduced to
the chamber through a microbiological filter till the equilibration with
atmospheric pressure.
Note:
The temperature of the chamber must be below 230ºF and the pressure must
be below 115 kPa to enable the door to be opened.