38
39
1155 EO Injection Stage
•
Simulate EO
is an option to run an entire cycle without using ethylene oxide (EO) If the Simulate EO set point is ‘Yes’ the pressure will rise with filtered air during the EO Exposure stage to
an estimated level of 20 mBar (20 kPa) above the Minimum Pressure Increase set point programmed by the user (see below) A 3M™ Steri‑Gas™ EO Gas Cartridge will not be accepted
by the sterilizer for cycles that Simulate EO
Note –
If a cycle error occurs during a simulated EO cycle, after the conditioning stage, the GSX Series will perform a full error recovery which includes 5 flushes and a minimum of
90 minutes of aeration (an estimated 2 – 3 hours of error recovery)
•
V
acuum level
is the target chamber pressure just prior to puncturing the 3M™ Steri‑Gas™ EO Gas Cartridge The preprogrammed cycle setting for EO injection vacuum level is 160 mBar
(kPa 160)
•
Minimum pressure increase
is the required minimum chamber pressure rise in 70 seconds after EO injection If the chamber pressure does not rise above the minimum pressure
increase, the cycle will automatically cancel and will proceed to EO Removal, Flushing and Locked Aeration (if programmed) before the user can access the chamber
Table 4 is the calculated minimum pressure rise 70 seconds after EO injection for the four available 3M™ Steri‑Gas™ EO Gas Cartridges for each chamber
size GS5X and GS8X. Calculations are based on nominal fill weights of the Steri‑Gas EO Gas Cartridges.
GS5X
Nominal Weight of EO
(grams)
Calculated Empty Chamber
Gas Concentration (mg / L)
Process Temperature Range
(°C)
Calculated Minimum
Pressure Increase (mBar & kPa)
4‑100
100 g
735 mg/L
34 ‑ 60°C
427 – 463 mBar
427 ‑ 463 kPa
4‑134
127 g
934 mg/L
34 ‑ 60°C
542 – 582 mBar
542 ‑ 582 kPa
8‑170
N/A
N/A
N/A
N/A
4‑60*
Custom
Custom
34 ‑ 60°C
Custom
GS8X
4‑100**
100 g
446 mg/L
34 ‑ 60°C
259 – 281 mBar
259 – 281 kPa
4‑134**
127 g
567 mg/L
34 ‑ 60°C
329 – 357 mBar
329 – 357 kPa
8‑170
170 g
759 mg/L
34 ‑ 60°C
440 – 478 mBar
440 ‑ 478 kPa
4‑60*
Custom
Custom
34 ‑ 60°C
Custom
*4‑60 catalog number is a custom fill 3M™ Steri‑Gas™ EO Gas Cartridge
** The use of a 4‑100 and 4‑134 catalog number in the GS8X requires a special adaptor For more information, in the US contact 3M Health Care Helpline at 1‑800‑228‑3957 Outside the US
contact your local 3M office or to locate your local office go to www3Mcom
Table 4. Calculate Minimum Pressure Increase
