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5.7. Test 1: B&D Test
Test 1 is the Bowie & Dick test program, with fixed sterilization
parameters 134ºC and 3.5mins, which cannot be modified by the
operator or the technician.
Nominal parameters
• Sterilization temperature: 134ºC
• Sterilization time: 3.5 minutes.
• Dry time: 1 minute.
• Max. cycle time: 30 minutes.
• Average cycle time: 25 minutes.
Operations Sequence
• Air removal phase; three vacuum pulses as described in the diagram
below. Saturated steam is introduced into the chamber until the
sterilization temperature is reached.
• Sterilization phase; temperature and pressure are maintained
constant at the pre-set level 134ºC for sterilization time 3.5 minutes.
• Fast exhaust phase; steam is rapidly exhausted from chamber
followed by a continuous vacuum pulse (1 minutes) and then by
vacuum break (air inlet), until pressure equalizes atmospheric
pressure.
Cycle start
Cycle end
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