ower heat
fresh air
0
1
2
3
4
5
6
alarm set
UE/BE 200-800, SE 200-400, ULE/SLE 400-800
22
13 Sterilisers
13.1 Application
The apparatus is used for sterilizing medical materials by employing dry heat through hot
air at atmospheric pressure
13.2 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
Place the cleaned instruments, twin-packed in aluminium foil
(recommendable)
Sharp Instruments or
blades
Place the cleaned instruments, twin-packed in aluminium, foil
(recommendable)
Modern Syringes 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. e.g., German drug book
DAB 10 or other national standards).
For sterilisation, the set temperature dependent operation should always be used. The
applicable hold time consists of the equalizing time (i.e. the time it takes until the desired
temperature is reached at any point of the working chamber), of the actual extinction 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 cabinets 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 unit are given in this operation manual and on the adhesive label
directly on the cabinet.
Sterilisation Weight of the load (see chapter 12)
temperature 180°C low medium high
Unit size without fan with fan without fan with fan without fan with fan
200 0.50 h - 1.20 h - 1.50 h -
300 0.50 h - 1.20 h - 1.50 h -
400 1.10 h 1.00 h 1.50 h 1.20 h 2.00 h 1.50 h
500 1.10 h 1.00 h 1.50 h 1.20 h 2.00 h 1.50 h
600 1.30 h 1.00 h 2.20 h 1.30 h 2.20 h 2.20 h
700 1.30 h 1.00 h 2.20 h 1.30 h 2.20 h 2.20 h
800 1.40 h 1.10 h 2.20 h 1.40 h 2.50 h 2.20 h
The sterilisation time has to be multiplied by about 4, if a sterilisation temperature of 160°C
is selected.
With large units and heavy loads, the use of grates (option) is recommended instead of the
perforated shelfs.
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