Chapter 1: Product and component descriptions
LaserSense HSSD-2 Aspirating Smoke Detector Installers Handbook 11
(6) The <ISOL> Button toggles the unit‘s isolation state. When isolated, the unit cannot
generate any alarms and will signal a fault condition and the text display will show Panel
Isolate. A detector is shipped with its <ISOL> Button disabled as default. These three
buttons can be individually enabled or disabled. The factory default state of the detector is:
<TEST> button enabled and <RESET> and <ISOL> buttons disabled.
(7) Status Display (if fitted) shows all events as they happen in real time and is also used to
configure the unit.
(8) Smoke Density Indicators (scaled smoke levels) display absolutely scaled smoke levels
above 1% obscuration per metre (0.30% obscuration per foot) to a maximum of 25% obs/m
(7.62% per foot). The Alarm 2 activation level is programmed normally somewhere in this
range. The bar graph display will show a continually cycling pattern when the unit is in
FastLearn mode. On the command module display, this will occur when any unit on the
RS-485 communications loop is in FastLearn. Otherwise, the bar graph display on the
command module mimics the bar graph display on the highest-reading detector on the loop.
(9) Aux. Alarm, Pre-Alarm, Alarm (Fire), and Alarm (Fire) 2 indicators illuminate when the set
alarm level has been reached and the set time delays have expired. On a command module,
the indicators signify an alarm condition from any detector on the communications loop.
(10) Smoke Density Indicators (1 through 10) are the relatively scaled ClassiFire bar graph and
changes in steps of half a segment.
Display types
The standard detector display is a two-line LCD which allows basic programming
of the detector. See Figure 9.
Figure 9: Standard detector display
The command module display contains more information than the standard
detector display. The command module display instructs the user with graphic
symbols. See Figure 10.
Figure
10
: Command module display
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