General features:
Seven levels of sensitivity from 0.2% to 3.7%
UL listed to Standard 268
Louvered smoke sensor design enhances smoke
capture by directing flow to chamber; entrance areas
are minimally visible when ceiling mounted
Designed for EMI compatibility
Magnetic test feature is provided
Optional accessories include remote LED alarm
indicator and output relays
Description
Digital Communication of Analog Sensing.
TrueAlarm analog sensors provide an analog
measurement digitally communicated to the host control
panel using Simplex addressable communications. At the
control panel, the data is analyzed and an average value is
determined and stored. An alarm or other abnormal
condition is determined by comparing the sensors present
value against its average value and time.
Intelligent Data Evaluation. Monitoring each sensors
average value provides a continuously shifting reference
point. This software filtering process compensates for
environmental factors (dust, dirt, etc.) and component
aging, providing an accurate reference for evaluating new
activity. With this filtering, there is a significant reduction
in the probability of false or nuisance alarms caused by
shifts in sensitivity, either up or down.
Control Panel Selection. Peak activity per sensor is
stored to assist in evaluating specific locations. The alarm
set point for each TrueAlarm sensor is determined at the
host control panel, selectable as more or less sensitive as
the individual application requires.
Timed/Multi-Stage Selection. Sensor alarm set points
can be programmed for timed automatic sensitivity
selection (such as more sensitive at night, less sensitive
during day). Control panel programming can also provide
multi-stage operation per sensor. For example, a 0.2%
level may cause a warning to prompt investigation while a
2.5% level may initiate an alarm.
Sensor Alarm and Trouble LED Indication. Each
sensor bases LED pulses to indicate communications
with the panel. If the control panel determines a sensor is
in alarm, or is dirty or has some other type of trouble, the
details are annunciated at the control panel and that sensor
bases LED will be turned on steadily. During a system
alarm, the control panel will control the LEDs such that
an LED indicating a trouble will return to pulsing to help
identify the alarmed sensors.
