ASP STERRAD 100, Service Manual

Page: 119 / 309

Software Safety Considerations
The software is designed to shut down certain functions for safety
reasons. These functions are listed below.
F
The output of the RF generator shuts down when faced with
mismatches of greater than 1.5 VSWR to protect personnel from the
RF shock.
F
The door over center sensor is monitored to protect personnel from
hazards.
F
The active low digital output design forces a graceful shut down in
the event of failure in any device or harness.
F
The door remains closed if a power failure occurs during a running
cycle.
F
The door automatically reverses if there is an obstruction of 14 kg
(30 lbs) or more.
F
The RF power can not be activated if the chamber pressure is over
700 mTorr.
F
If a failure occurs, a 10 minute CANCEL CYCLE runs to prevent
exposure of the operator to H
2
O
2
vapor.
Process Parameter Tolerance
Time 1 sec
Pressure 25 mTorr
Temperature 2.5 C
F
The operator controls are located on the control panel at the front top
right of the sterilizer and include the following push button controls:
F
START -Initiate a cycle after automatically closing the door, if
necessary. At the end of a successful cycle, the door remains closed.
F
CANCEL - Stops the cycle and opens the door at the end of the
CANCEL operation.
F
OPEN DOOR - Opens the door when the machine is in idle mode.
F
CLOSE DOOR - Closes the door.
F
PAPER ADVANCE - Advances the printer paper while the switch is
pressed.
Edit Mode
User Interface and Control Subsystems Theory of Operation
6-6 STERRAD® 100 Sterilizer ASP Service Guide rev D.