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5.2. Alarming the exceeding of the correct temperature range.
The controller has the function of signaling the exceeding of the set temperature range. In order for
the function to work properly, the appropriate temperature range must first be programmed, that
is: parameter A1 – temperature below which the alarm will be activated, and parameter A2 –
temperature above which the alarm will be activated (see section 3.4.).
The third parameter to be defined is the time delay of switching on the alarm function from
the moment the controller is switched on – parameter AA. This delay eliminates the triggering
of an alarm in the initial cooling phase.
Exceeding the set temperature range is signaled visually and audibly. In the event of an alarm,
the buzzer is triggered cyclically every 1 min. for 5 sec., and alternately: PPP letters and temperature
value are displayed.
ATTENTION
The parameter AA is t
he same
to the delay time specified in the function
of recording maximum
and minimum temperature values. In other words, the delay value set in parameter AA will be
the same for recording maximum and minimum temperature and for parameters A1 and A2.
The audible alarm can be turned off by setting the HE parameter to 1 (see section 3.4.). In this case,
exceeding the set temperature range is signaled only visually, as shown in the figure above.
The alarm system (audible and visual) can also be turned off completely by changing the HA
parameter to 1 (see section 3.4).
5.3. Temperature sensor damage indication.
If the controller detects damage to the sensor, the letters ACU appear on the display and at the same
time the audible alarm is activated. The operation of the chiller and the stirrer is interrupted until
the failure is removed.
