User manual

39 User manual
Annex 4: BOWIE & DICK TEST
The Bowie & Dick Test, also called the Brown Test, is representative of the small porous type load.
It comprises several sheets of paper and foam wrapped in a small packet in the middle of which there is a chemical
heat-sensitive indicator strip (physic-chemical test).
This test is used to validate the equipment performance in terms of textile load sterilization, i.e.:
 Pre-vacuum efficiency and thus steam penetration.
 Temperature and pressure parameters of the saturated steam during the holding time.
The cycle profile is identical to that of other cycles with :
 a temperature of 135,5°C .
 a pressure of 2,16 bar.
 a sterilization plateau of 3min 20 sec
guaranteeing a security margin.
 a drying time cut to 4 min not to falsify the result.
Carry out the test as follows:
♦ Place the Bowie & Dick Test (complete packet) on the lower tray of the chamber, with the label facing upwards.
♦ Select and start the Helix / B&D cycle from the "service" sub-menu.
♦ Once the cycle is completed, open the door and remove the test. Caution: the packet will be very hot!
♦ Remove the indicator strip from the centre of the packet.
Correct result: Incorrect result:
The radial strips have turned black The central part is not the same colour as the edges.
The result is also incorrect, if the indicator is grey or silver (over-exposure, i.e. excessive temperature).
You can enter your name, the date, cycle number and sterilizer number on each test for filing purposes.
PR
VEN
LEV
End
D1
D2
DVs
DVe
Duration
PV1
PP1
PV2
PP2
PV4
PPh
PV3
PP3 PP4
PV5
2.16
Pressure (bar)
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