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After the 5 minutes have elapsed, the printer records the
pressure that is referred to as P2. At this point the test begins
and lasts 10 minutes.
At the end of the test, the printer records the results. The
pressure at the end of the test is referred to as P3. The rate of
change of P3-P2 shall not exceed 0.13 kPa/min.).
5.13 Program 13: Bowie and Dick Test (PV – pre-
vacuum models only)
Bowie and Dick test is a test program with the following
parameters:
Nominal parameters default settings
Sterilization temperature: 134ºC (273º F)
Sterilization time: 3.5 minutes.
Drying time: 1 minute.
Operations Sequence:
Pulse low/Pulse high: Four vacuum pulses will build vacuum
down to 25 kPa.
Heating: Steam enters the chamber and heats it up until the
sterilization temperature is reached.
Sterilization: Temperature and pressure are maintained
constant at the pre-set level 134ºC (273º F) for sterilization time
(3.5 minutes).
Cooling: N/A.
Fast Exhaust: Steam is exhausted out of the chamber at a fast
rate until pressure decreases to ambient pressure.
Drying: Vacuum is built up and the air pump is working.
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