ASP STERRAD 100, Service Manual

Page: 142 / 309

Introduction
This section details the door and chamber subsystems. Included in this
chapter are the theory of operation as it relates to the door and chamber,
the tools needed for door and chamber maintenance; calibration,
including guide rail alignment; also removal and replacement of the
door, electrode, sight glass; certification of the door and chamber
temperatures.
Different Door and Chamber
Configurations
The STERRAD
®
100 system is currently in the
Block 2.0
and STERRAD
100 S
System phase. These versions are only slightly different, with
regard to the “look” of the door, from previous versions of the STERRAD
100 System. The chamber has slight variations as to the placement of
some components on its exterior: The heaters are different, and in
different locations on the
Block 2
systems. Some of the tests have slight
variations to accommodate the multiple injection stages of the STERRAD
100 S
Software cycle.
Differences in configurations are noted in the text. When you see the
STERRAD Icon next to the text, as with this paragraph, that is the
symbol for a configuration other than Block 1.8.
Door and Chamber Subsystem
Descriptions
The chamber (also known as the process chamber) is a cylinder, closed
on three sides and sealed by a door during the sterilization cycle. Within
the chamber, concentric with the chamber wall, is the electrode screen,
which, when excited by the RF subsystem, helps to create the plasma
during the plasma stage of the cycle.
The door is activated by means of a pneumatic cylinder and is operated
by the touch buttons on the user interface. The door moves vertically
and several sensors monitor its travel and activate error messages to
alert the user to problems. The door has no window (and is very heavy),
though it can be pushed downward by hand if there is no vacuum in the
chamber.
Door and Chamber Subsystem Introduction
7-2 STERRAD® 100 Sterilizer ASP Service Guide rev D