ASP STERRAD 100, Service Manual

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F
If the operator presses
CANCEL
at any time during the sterilization
cycle, or if the control subsystem detects a malfunction, the door
automatically opens after the current stage has been safely
terminated. The operator cannot open the door using
OPEN DOOR
during the sterilization cycle.
The door sealing the process chamber during the sterilization cycle is
moved up and down on guide rails, by a cable driven by a pneumatic
cylinder. This cylinder is controlled by a 4 way solenoid valve, actuated
by signals from the control subsystem. The cylinder raises the door to its
locked operating position, or lowers the door slowly to its rest position.
The door’s weight is balanced by a counterweight.
Three sensors send signals to the control subsystem for door control.
These sensors mark top and bottom door positions, and the position at
which the door seals the process chamber.
4
Note
: The adjustment and function of the three door sensors
are critical for correct sterilizer operation.
The bottom sensor indicates the door is fully open and any command to
close the door is valid. The top sensor detects that the door has reached
the upper travel limit. The over-center sensor detects movement of the
door over-center mechanism. This movement is indicative of two possible
situations:
F
If the over-center sensor is activated before the top sensor, due to the
door being blocked before reaching the end of its travel, the door
reverses direction and opens immediately.
F
If the door over-center sensor is activated after the top sensor, the
door has closed completely and correctly. Evacuation of the chamber
can proceed.
Calibration
IMPORTANT!: Your first step when calibrating a system is to verify that
the system is properly connected to the power source, and to make sure
all the subsystems are properly connected to the AC system and all
circuit breakers are on and functioning normally. Once you have
verified these things, proceed with your calibration steps.
Door and Chamber Temperature
4 4
Note: Assure the system has had power applied for at least 45
minutes.
1. Remove the system panels. Begin an empty chamber cycle.
4 4
Note:
On STERRAD 100 S Systems, perform the steps below
during the second injection stage, not the diffusion stage.
Door and Chamber Subsystem Calibration
7-4 STERRAD® 100 Sterilizer ASP Service Guide rev D