Det-Tronics X9800 IR Flame Detector with Pulse Output - Manual (Page 5)

3 95-8555 5.1
Important
Mag oi can be performed with the controller’s
(R7404/R7494) keylock switch in either the
NORMAl or TEsT position. In NORMAl, the
controller goes into alarm and activates its outputs.
If no controller alarm output is desired, place
the keylock switch in the TEsT position before
touching the magnet to the outside of the detector.
Man
oi operates only with the keylock switch in
the TEsT position.
During the entire test, the detector gives no indication
of alarm.
To reset the controller status and alarms, place the
keylock switch in RESET. Return the keylock switch to
NORMAL when testing is complete.
The Man oi test is nearly identical to the Mag oi test,
except for the manner in which the test is initiated:
• Place the keylock switch on the controller (R7404/
R7494) in the TEST position.
• Press the SELECT button to select the appropriate
detector for test.
• Press the TEST/ACCEPT button to initiate the test.
Controller and detector responses are identical to the
Mag oi test described above.
To reset the controller status and alarms, place the
keylock switch in RESET. Return the keylock switch to
NORMAL when testing is complete.
NOTE
Refer to Appendix A for FM verification of
Det-Tronics’
oi 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.
DaTa LOggINg
Data logging capability is also provided. Status
conditions such as normal, power down, general and oi
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 Det-Tronics’ Inspector Connector
accessory or RS-485.
INTEgRaL wIRINg COMpaRTMENT
All external wiring to the device is connected within the
integral junction box. The detector is furnished with
four conduit entries, with either 3/4 inch NPT or M25
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.