ScreenMaster RVG200
Paperless recorder
7 Configuration
108
OI/RVG200-EN
7.9.6 F
0
(sterilization optimization) configuration
Calculation
The recorder's F
0
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 F
0
algorithm used by the recorder is:
The result of the F
0
calculation is displayed in minutes in the Digital Indicator view (see Fig. 4.6, page 31)
and in the Totalizer log (see Fig. 4.10, page 35).
Note.
The totalizer tabs are displayed only if the totalizer option is enabled.
F
0
configuration is applicable only to analog totalizers.
Current F
0
values are displayed in the Indicator view – see Section 4.5.2, page 31 (Operation) and
Section 7.8.3, page 84 (Configuration), respectively.
Only totalizer A on all recording channels can be configured to display an F
0
value. If totalizer A is
configured to display an F
0
value, totalizer B on the same channel is disabled automatically.
Totalizer A
Setup
Mode
Set to
F
0
.
Wrap enable
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 2 seconds, 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 F
0
value
is reset. The pulse can be assigned to a relay, digital output or digital
counter.
F
0
SampleTime
10
T
121.11
Z
–
60
F
0
previous
+
=
