Specifications

3 95-85547.2
CAUTION
These tests require disabling of all extinguishing
devices to avoid release resulting from a
successful test.
The magnetic o
i
test is performed by placing a magnet
by the marked location (mag o
i
) on the outside of
the detector. The manual o
i
test is accomplished by
connecting the o
i
lead (terminal 22) to power supply
minus via an external switch. The magnet or switch
must be held in place for a minimum of 6 seconds
to complete the test. Either of these test methods
activates the calibrated IR emitter. If the resulting
signal meets the test criteria, indicating that greater
than half of the detection range remains, the Alarm
relay changes state, the indicating LED changes to
red, and the 0-20 mA current output goes to 20 mA.
This condition remains until the magnet is removed or
the switch is released, regardless of whether the relays
are set for latching or non-latching operation.
If less than half of the detection range remains, no alarm
is produced and a fault is generated. The fault indication
can be reset by momentarily applying the magnet or
manual o
i
switch.
NOTE
Refer to the Appendix A for FM verication of
Det-Tronics’ Optical Integrity o
i
function.
COMMUNICATION
The X9800 is furnished with an RS-485 interface for
communicating status and other information with external
devices. The RS-485 uses MODBUS protocol, with the
detector configured as a slave device.
NOTE
The EQP model uses LON/SLC communication.
RS-485 communication is not available on the
EQP model.
DATA LOGGING / EVENT MONITORING
Data logging for event monitoring capability is also
provided. The detector can log up to 1500 events
(up to 1000 general and 500 alarm events). Status
conditions such as normal, power down, general and
o
i
faults, pre-alarm, fire alarm, time and temperature
are recorded. Each event is time and date stamped,
along with the temperature and input voltage. Event
data is stored in non-volatile memory when the event
becomes active, and again when the status changes.
Data is accessible using the RS-485 port or the EQP
controller.
INTEGRAL WIRING COMPARTMENT
All external wiring to the device is connected within
the integral junction box. The screw terminals accept
wiring from 14 to 24 AWG. The detector is furnished with
four conduit entries, with either 3/4 inch NPT or 25 mm
threads.
SIgNal PROCESSINg OPTIONS
The X9800 features signal processing options. These
options determine the type of logic that the detector will
use for processing fire signals to customize the X9800
to the application. Two signal processing options are
available for the X9800:
TDSA enabled –
Both TDSA and Quick Fire enabled (either initiates –
fire alarm).
Time Domain Signal Analysis (TDSA)
The TDSA signal processing technique analyzes the
input signal in real time, requiring the IR signal to flicker
randomly in order to recognize it as a fire condition.
Using TDSA signal processing, the X9800 ignores
regularly chopped blackbody sources (occurring in areas
where moving conveyors and hot objects in proximity
to one another result in a regularly chopped IR signal),
because it looks for a less uniform signal. However, in
the presence of a regularly chopped signal, the unit is
more susceptible to false alarms due to sporadic IR that
functions as a trigger when occurring in conjunction with
the regularly chopped signal.
Quick Fire (High Speed)
The Quick Fire (High Speed) feature can be used in
conjunction with the TDSA signal processing method.
This method overrides TDSA requirements in the event
of an intense signal. When Quick Fire is activated, the
detector is capable of responding to an intense fire signal
in less than 30 milliseconds (0.030 seconds). Using
the Quick Fire feature in conjunction with TDSA signal
processing allows the detector to provide a high speed
response to a large, non-flickering fire (such as in high
pressure gas applications) while maintaining an ability to
respond to smaller fires.