ASP STERRAD 100, Service Manual

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Vent Stage
Time 4 minutes 9 minutes
Pressure at Completion 690 Torr 760 Torr
Vacuum Stage
Duration Parameter Limit
Variable Time 20 minutes max.
Pressure 300 mTorr
Temperature 60 ms 10 C Alarm
40-50° C Control
Preheat vaporizer time 0 - 5 min. ON
5 - 20 (max.) min.
60% ON - 40% OFF
Air is pumped from the process chamber, reducing pressure from
atmospheric (760 Torr) to 300 mTorr. This stage normally lasts 5 to 10
minutes. If pressure is not reduced to 300 mTorr within 20 minutes, the
cycle is automatically restarted.
If a pressure of 700 mTorr is reached within the first 5 minutes of the
vacuum stage, the RF power is turned on to initiate a plasma. This dries
the load and prevents “vacuum not low enough for injection” failures.
The RF power is then turned off when the pressure reaches 300 mTorr
or 15 minutes into vacuum stage.
If a pressure of 1 Torr or less is not reached within the first 9 minutes of
the vacuum stage the cycle cancels and informs the operator to
repackage and restart sterilizer. If 300 mTorr is not reached within 20
minutes, the system aborts the process and restarts automatically. If the
sterilizer restarts automatically and the cycle cancels again for the same
error, the abort cycle occurs.
System Operation Theory of Operation-Overview
2-6 STERRAD® 100 Sterilizer ASP Service Guide rev. D