Tuttnauer 3870 EHS (HSG-WS) Инструкция по эксплуатации онлайн [25/58] 387790

3.4.2 Program 4 - (4 - WDry 273)

This program is available only in the 3870EHS

Program 4 is recommended for wrapped instruments, porous load

and other materials when the manufacturer recommends

autoclaving at temperatures of up to 273ºF with a drying stage.

Nominal parameters

♦ Sterilization temperature: 273ºF - 279ºF.

♦ Sterilization time: 8 minutes.

♦ Dry time: 20 minutes.

Operations Sequence

♦ Pre Vacuum stage; four vacuum pulses remove 99.5% of the

air by drawing the chamber down to -11

psig (22 Ih). At the

end of the pre vacuum stage s

team enters the chamber from the

jacket until the sterilization temperature and pressure is

reached.

♦ Sterilization stage; temperature and pressure are maintained

constant at the preset level for the programmed sterilization

time by periodic injection of steam from the jacket.

♦ Exhaust stage; steam is rapidly exhausted from the chamber

allowing the chamber pressure to reach 0 psig (atmospheric

pressure).

♦ Post Vacuum Drying stage; while the jacket is heated to

maintain a high temperature environment within the

chamber, a single vacuum pulse is created for 20 minutes in

order to release and remove residual moisture from any

items within the chamber.

TIME

PRESSURE (PSIG)

TEMPERATURE

Ambient Pressure

and Temperature

-11 psig (22 Ih)

t1 = Pre Vacuum stage

t2 = Sterilization stage

t3 = Fast exhaust stage

t4 = Post Vacuum Drying stage

= Pressure

= Temperature

8.5 psig