ASP STERRAD 100, Service Manual, Page: 19 / 309

Routine Maintenance
The operator is required to perform maintenance as detailed in the
Operator’s Manual. The operator maintenance includes cleaning the
injector valve vaporizer bowl, replacing the printer ribbon and replacing
the cassette collection box. Printer paper is replaced as needed.
In addition to the routine maintenance performed by the operator the
service technician performs these activities:
F
Complete the planned maintenance procedure and product
certification at 750 cycles or 6 months using the PM1 kit.
F
Complete the planned maintenance procedure and product
certification at 1500 cycles using the PM2 kit.
Service Philosophy
Sterilizer servicing is limited to the service activities described in this
guide. All planned and corrective maintenance activities must be
performed by ASP or its authorized representative. Unauthorized repairs
void the warranty.
The Sterilization Cycle
The sterilization cycle is automatically controlled by a programmed
microprocessor that monitors operating parameters and controls each of
the five stages of the cycle. The operator interacts with the system
through the control panel, a status indicator display, and a two-line
alphanumeric display.
When the operator has loaded the process chamber and pressed the
START
button, the door automatically closes and the five stage
sterilization cycle proceeds. The five stages are as follows:
F
Vacuum - The atmospheric pressure in the process chamber is
reduced to 300 mTorr.
F
Injection
- Hydrogen peroxide is initially vaporized into the process
chamber.
F
Diffusion
- Then the hydrogen peroxide vapor is allowed to diffuse to
all areas of the load for a fixed time period.
F
Plasma - RF energy ionizes gases within the process chamber.
F
Vent
- Filtered air is admitted into the chamber, and then returned
to atmospheric pressure.
Theory of Operation-Overview System Operation
ASP Service Guide rev. D STERRAD® 100 Sterilizer 2-3