Operating Manual MELAdoc label printer
16
Glossary
Bowie&Dick test
Checks and simulates the steam penetration of a 7kg textile package. A load of this size is
usually not permitted for small steam sterilizers Moreover, experience shows that small
steam sterilizers are more often used to sterilize hollow articles than textiles. Of greater
practical relevance for hollow bodies is verification using a steam penetration test (Helix
test). The Helix test sets greater requirements for the autoclave than the Bowie&Dick test.
For the Helix-Test, MELAG recommends the
MELAcontrol
®
(Article No. 01080).
Vacuum test
In accordance with DIN 58946-6:2002, this test must be carried out for large steam
sterilizers on a monthly basis, as far as the manufacturer has not prescribed shorter test
intervals (e.g. daily). With small steam sterilizers, this test only serves the purpose of
trouble shooting when errors occur (e.g. upon a failed Helix test). As long as the
manufacturer has not issued any further specifications, the test should not be performed
on a daily basis.
Empty chamber sterilization
This procedure removes any condensate remaining in the steam conduits of a large
steam sterilizer from the previous day. This also serves to pre-warm the sterilizer.
Whether empty chamber sterilization is necessary is determined by the respective
manufacturer. MELAG autoclaves do not require empty chamber sterilization.
Indicators
The impossibility of making a certain prediction of the appearance (return discolouration)
of a coloured indicator (Helix test or Bowie&Dick test) after five or more years means that
it is necessary to make a written record of the successful colour change. It is not
necessary to store the indicators used.
