Date
9/7/2018
File
BSR-2114/MAR
Document Number
921211401_09_002
Page
15 από 74
15
2.4
Pre-alarm state
If a point that is connected to the loop issues a pre-alarm then the yellow LED marked
“Pre-Alarm”
lights. The LCD screen
will show additional details about the pre-alarm.
Figure 2-4 Screen layout and indications during the pre-alarm state
The total number of pre-alarm events
(Pre-alarm counter)
is shown to the right of the window title. The screen is divided into
2 sections. The upper section shows the first pre-alarm event along with the date 05/07/07, time 13:41, name of the point the
issued the pre-alarm and finally the type of point. The lower section shows the last pre-alarm event that took place.
When a pre-alarm is issued the internal buzzer will sound periodically and all the units that are connected with the alarm will
be activated. If we want to stop the buzzer we can press the
“Buzzer Silence”
key.
In order to receive a pre-alarm signal, at least one point must be configured to issue pre-alarm signals. By default no points
are configured to issue pre-alarm signals. Usually we select to receive pre-alarm signals only from detectors that are installed
in areas where the fire will not grow in a rapid rate.
If simultaneous alarm and pre alarm conditions occur, the LCD will show the alarm events and the indication “PREALARMS”.