Memmert SLM 400, Operating Instructions Manual

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°C
UM 200-800/SM 200-400, ULM/SLM 400-800 11
8 Steriliser
8.1 Application
The apparatus is used for sterilizing medical materials by employing dry heat through hot
air at atmospheric pressure
8.2 Directives for sterilisation in MEMMERT- hot-air sterilisers.
For the hot air sterilisation, many directions exist concerning the temperatures and
sterilisation times to be selected as well as the packaging of the sterilisation goods. The
data to be selected, depend on the nature of the goods to be sterilised and on the type of
the germs to be deactivated. Please make yourself familiar with the applicable direction
for your application before carrying out a sterilisation with your MEMMERT steriliser.
Some examples for the correct preparation of different medical instruments are shown in
the following table:
Charging Preparation
Instruments with no soft soldered
parts / sharp Instruments Place the cleaned instruments, twin-packed in aluminium foil
(recommendable)
Modern Syringes (no plastic) Place flasks and cylinders separately, twin-packed in aluminium foil
(recommendable)
Glass and glass instruments Disassemble the cleaned glass containers and glass syringes. Place
on trays - cool slowly
Bottles and similar items must be sterilised with the opening pointing downward in order to
prevent the development of cold air nests. Organic fabrics (e.g. cork) must not be used as
closing material for bins.
180°C are usually recommended as sterilising temperature (cf. German drug book DAB 10
or other national standards).
The whole required time period is setted using the timer. The time period consists of the
heating time, the equalising time (i.e. the time it takes until the desired temperature is
reached at any point of the working chamber), of the actual sterilising time and the safety
surcharge.
The following table shows rough values for the hold time to be selected at the controller, in
dependence of the weight of the sterilising load for ovens with and without air turbine (fan).
Please note, that this data can only be applied for correct, loose loading. Information on
the right loading of the oven are given in this operation manual and on the adhesive label
directly on the steriliser.
Sterilisation temperature = 180°C
Weight of the load
low medium high
SM/SLM
without fan
h
sterilising time
with fan
h
sterilising time
without fan
h
sterilising time
with fan
h
sterilising time
without fan
h
sterilising time
with fan
h
sterilising time
200 ¾+¾=1½ h
-
¾+1¼=2 h - ¾+1¾=2 ½h -
300 ¾+¾=1½ h - ¾+1¼=2 h - ¾+1¾=2½ h -
400 ¾+1¼=2 h ½+1=1½ h ¾+1¾=2½ h ¾+1¼=2 h 1+2=3 h ¾+1¾=2½ h
500 ¾+1¼=2 h ½+1=1½ h ¾+1¾=2½ h ¾+1¼=2 h 1+2=3 h ¾+1¾=2½ h
600 1+1½=2½ h 1+1=2 h 1+2½=3½ h 1+1½=2½ h 1¼+2¼=3½ h 1+2=3 h
700 1+1½=2½ h 1+1=2 h 1+2½=3½ h 1+1½=2½ h 1¼+2¼=3½ h 1¼+2¼=3½ h
800 1½+1½=3 h 1¼+1¼=2½ h 1½+2½=4 h 1¼+1¾=3 h 1½+2½=4 h 1¼+2¼=3½ h
The sterilisation time has to be multiplied by about 4, if a sterilisation temperature of 160°C
is selected.