6-22
387366-389 Operator Manual Sterilizer Operation
The DART
1
and Bowie-Dick cycles are designed to document the
removal of residual air from a sample challenge load.
Run a DART Cycle or Bowie-Dick Cycle by pressing DART TEST or
BOWIE DICK TEST from Cycles Page 6 of 6 Screen (Screen 7). The
cycle phases and parameters are identical except for the following:
DART:
pulse charge: 26.0 psig (1.79 bar)
sterilize temperature: 132.0 °C (270 °F)
sterilize time: 3:30
BOWIE DICK:
pulse charge: 15.0 psig (1.03 bar)
sterilize temperature: 121.0 °C (250 °F)
sterilize time: 8:00
JACKET CHARGE PHASE: Continues until jacket temperature is
greater than 132.0°C (270.0°F).
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.
PULSE EXHAUST PHASE: Chamber exhausts to 4.0 psig (0.28 bar).
Waste temperature is controlled to maintain approximately 60°C
(140°F). Jacket temperature is controlled to maintain approximately
133.5°C (273.0°F) in jacket.
PULSE EVACUATE PHASE: Chamber evacuates to PULSE VACUUM
setpoint (default 10.0 inHg (-0.34 bar) plus one minute. Waste
temperature is controlled to maintain approximately 60°C (140°F).
Jacket temperature is controlled to maintain approximately 133.5°C
(273.0°F) in jacket.
PULSE CHARGE PHASE: Chamber charges with steam to PULSE
CHARGE setpoint (default 26.0 psig (0.34 bar). PULSE EXHAUST,
PULSE EVACUATE, and PULSE CHARGE repeat for the number of
pulses selected.
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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