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Cod. +030221881 rel. 1.0 - 11/02/2000 42
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ö
WX
day of last
+$
event
1 7 - -
ö
WK
hours of last
+$
event
0 23 hours -
ö
W¶
minutes of last
+$
event
0 59 min -
W$
number of
+$
events detected
since reset
0 127 - 0
ö
WW
maximum tem
erature value durin
+$
alar
-50 127
°C/°F
-50
ö
WG
maximum duration of the
+$
events
0 18 hours 0
ú
WX
da
of last
+)
even
1 7 - -
ú
WK
hours of last
+)
even
0 23 hours -
ú
W¶
minutes of last
+)
even
0 59 min -
W)
number of
+)
events detected
since reset
0 127 - 0
ú
WW
maximum tem
erature value for
+)
alarm u
on resum
tion of
ower
-50 127
°C/°F
-50
WW
maximum tem
erature value for
+)
alarm before
ower failure
0 127 - 0
ú
WG
maximum duration of the
+)
even
0 18 hours 0
7DE
The parameters for recording the status provide a detailed description of the
+$
and
+)
alarms which have occurred since the
last reset. All the parameters are display-only, they are divided into two distinct groups for
+$
alarms and
+)
alarms, and are
displayed only if the relative alarm
+$
or
+)
is effectively present. The parameters are identified using the name associated to a
segment of the left-most digit,
ö
for the
+$
alarms and
ú
for the
+)
alarms (see figure). The order of display of the parameters
is listed in the table.
In the case of more than one event saved, the recording is of the time of the last event only, the total number of
+$
or
+)
events,
the maximum temperature measured during the
+$
and
+)
alarms and of the relative maximum durations.
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When the detection of the alarms
has been enabled by the correct setting of parameters
$+
and tr, the HACCP module performs
continuous control, at one minute intervals, of the control temperature, and based on this and the other parameters (alarm threshold
and delay times) signals and records the type
+$
alarms, which regard the exceeding of the set temperature limits for extended
periods longer than the set delay times. The module also controls the temperature on re-starts after power failures, signalling and
recording type
+)
alarms.
+$DODUP
arises when the control temperature is above the maximum set (
6(7$+
) for longer than the set delay (
$G
+ tr).
The parameter
$G
sets the alarm delay of the plug-in instrument, on exceeding this time an alarm signal (high temperature) is
activated, generated by the instrument itself; this signal can be used as a pre-alarm for the subsequent signal that the total time has
been exceeded (
$G
+ tr), which determines the actual
+$
alarm. The two parameters allow a maximum duration of 326 minutes to
be set.
Any alarm event involving the control probe of the plug-in instrument (
(
) is considered equivalent to the temperature being
greater than the threshold, and thus also determines a
+$
alarm signal after the set delay time.
When the
+$
alarm is detected the following information, regarding the status parameters, is recorded:
• maximum temperature reached during the alarm (above
6(7
+
$+
);
• time the alarm event started;
• duration of the alarm; when the alarm is in progress, the current duration is measured;
• number of events (
+$
) detected.
In the case of a series of alarm events, the information on the alarm is updated:
• the temperature involves the highest value of all the events recorded;
• the time refers to the last event;
• the duration is the longest of all the events recorded;
• the number of events is increased by 1.
+)DODUP
Occurs when, after a power failure for an extended period (more than one minute), the control temperature upon
resumption of power is above the set maximum (
6(7$+
).
The detection if this alarm is enabled as for the
+$
alarm:
$+
> 0 and tr > 0. The delay times in this case are not considered, as
the detection of the alarm is instantaneous if the power failure lasts longer than
$G
, and
$G
+ tr also gives the
+$
alarm signal.
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