WD1050
12/04/2010
Pag. 16
6.1. WASHING
PROGRAMME
SETTINGS
The instrument washer has a practical display that provides all the information the
user needs to know about the functions programmed.
Consult the following table to select the required programme. It gives the washing
cycle most able to suit the nature of the instruments you need to wash and the degree
of dirt involved.
Once you have found the most suitable washing programme in the table, turn the
PROGRAMME SELECTOR knob and select the desired programme by setting it to the
relative reference number.
The following is an indicative list of the type of washing cycles to which the available
programmes refer:
1.
Quick washing programme using cold water
.
2.
Washing programme at 60°C suitable for plastic w are.
3.
Washing programme at 75°C suitable for standard glassware.
4.
W disinfection at 90°C for 1’ (A
0
=600).
5.
W disinfection at 90°C for 5’ (A
0
=3.000).
6.
W disinfection at 93°C for 5’ (A
0
=6.000).
7.
W disinfection at 93°C for10’ (A
0
=12.000).
8.
Service programme: to test the detergent and neutralizer dispensers and rinse the
washing chamber.
6.2. THERMAL
DISINFECTION
IN
ACCORDANCE
WITH
THE
PARAMETER
"A0"
We introduce the "A
0
concept" to explain the time/temperature relationship used to
draw up the programmes.
According to EN ISO 15883 and the recommendations of the Robert Koch Institute
(European authority on the subject), an A
0
of 600 is considered as the minimum
standard for non-critical medical devices, i.e. for those that only come into contact with
uninjured skin. A further condition required is that microbic contamination must only be
slight and there must be no heat-resistant pathogens present.
An A
0
value of 600 can be obtained by maintaining a temperature of 80°C for 10
minutes or 90°C for 1 minute or again, 70°C for 100 minutes.
If the medical devices are contaminated with heat-resistant viruses, such as those of
hepatitis B, the value of A
0
must be at least 3000. This can be obtained by
maintaining a temperature of 90°C for 5 minutes.
An A
0
value of 3000 is considered the minimum value to apply to all medical devices
considered to be critical.
Programmes that include thermal disinfection have therefore been designed to offer
the following A
0
values:
