6-20
387366-389 Operator Manual Sterilizer Operation
The Warmup Cycle is used to warm sterilizer shelves, door and jacket
before a Daily Air Removal Test (DART)
1
or Bowie-Dick cycle is run.
Press RIGHT ARROW button on the second of three Operating Mode
screens to display Cycles Page 6 of 6 (Screen 7). Run a DART
WARMUP CYCLE by pressing DART WARMUP.
Press DART WARMUP button again and Cycle proceeds as follows:
JACKET CHARGE PHASE: Continues until jacket temperature is
greater than 132°C (270°F); or 121°C (250°F) for Bowie-Dick Test
cycle.
ACTIVATE SEAL PHASE: Door gasket seals with steam until door
seal switch is closed. An additional 20 seconds elapses, after seal
switch is closed, before phase is complete.
PURGE PHASE: Steam enters chamber from jacket to control
pressure at 6 psig. Fast exhaust and water ejector is on to aid in
removing air from chamber.
CHARGE PHASE: Chamber charges with steam until chamber
temperature reaches sterilize temperature. Waste temperature is
controlled to maintain approximately 60°C (140°F).
STERILIZE PHASE: Chamber temperature controls at sterilize
temperature plus overdrive (control temperature). Waste temperature
is controlled to maintain approximately 45.0° C (113.0° F).
FAST EXHAUST PHASE: Steam fast exhausts from chamber to
4.0 psig (0.28 bar).
VACUUM DRY PHASE: A vacuum is pulled in chamber to 10.0 inHg
(-0.34 bar) – VACUUM DRY setpoint.
DRY PHASE: Vacuum continues to be pulled to limit of system for set
dry time.
AIR BREAK PHASE: Chamber vacuum air breaks to 2.0 inHg
(-0.07 bar); a 10 second delay follows.
DEACTIVATE SEAL PHASE: Door unseals until seal pressure switch
opens and 20 seconds has elapsed.
COMPLETE PHASE: Cycle is complete. Open door and unload
chamber.
1
In this context and elsewhere, where implied
(such as on screen buttons), DART is an
acronym for Daily Air Removal Test. However,
note that the term is registered as a testing
apparatus, i.e., Dart
®
Testing Apparatus to
Determine the Effectiveness of Removing Air
from a Chamber.
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