F0 (Sterilization Optimization) Configuration - ABB SM500F User Manual

SM500F
Field mountable paperless recorder

7.8.6 F0 (Sterilization Optimization) Configuration

Note.

The totalizer tabs are displayed only if the Totalizer option is enabled.

Current F0 values are displayed in the Indicator view – see Section 4.5, page 38 (Operation) and
Section 7.7.3, page 89 (Configuration) respectively.

Only Totalizer A on all recording channels can be configured to display an F0 value. If Totalizer A
is configured to display an F0 value, Totalizer B on the same channel is disabled automatically.
Calculation
The recorder's F0 standard sterilization calculation is based on Ft @ T of 121.1 °C and Z of 10 °C where
Ft = equivalent sterilization time of the sterilization procedure under temperature (T) conditions with a given
Z value.
The recorder also adjusts Ft to compensate for changes in temperature in order to achieve a constant
sterilization affect. The value used is D; a time value with a default setting of 1 minute.
The F0 algorithm used by the recorder is:

=
F SampleTime
0
The result of the F0 calculation is displayed in minutes in the Digital Indicator view (see Fig. 4.5, page 38)
and in the totalizer log (see Fig. 4.8, page 45).
112
  T 121.11  Z  
–
   
10
Set 'Count enable' to 'F0'.
If 'Wrap enable' is set to 'On', the total is reset automatically to the 'Preset
count' value once the 'Predetermined count' value is reached.
If 'Wrap enable' is set to 'Off', the count stops when the 'Predetermined
count' value is reached.
Note. A wrap pulse, with a duration of 2s, occurs if the total reaches the
'Predetermined count' value and 'Wrap enable' is set to 'On'. If 'Wrap
enable' is set to 'Off', the wrap pulse becomes active when the
'Predetermined count' value is reached and remains active until the F0
value is reset. The pulse can be assigned to a relay, digital output or digital
counter.
Enter the F0 tag to be displayed in the Indicator view and the Totalizer log
archive (6 characters max).
Note. The default tag text includes 'F0' to distinguish an F0 value in the
totalizer log but this can be changed.
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60 F
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7 Configuration
IM/SM500F Rev. Z