Det-Tronics X3302 Multispectrum IR Flame Detector User Manual
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9.2
Magnetic
oi
/ Manual
oi
The detector also incorporates both Magnetic
oi
(Mag
oi
) and Manual
oi
(Man
oi
) features that
provide the same calibrated test as the Automatic
oi, and in addition actuates the Alarm output to verify
operation for preventive maintenance requirements.
These features can be performed at any time and
eliminate the need for testing with a non-calibrated
external test lamp.
CAUTION
These tests require disabling of all extinguishing
devices to avoid release resulting from a
successful test.
The Mag
oi
test is performed by placing a magnet at the
location marked "MAG OI" on the outside of the detector
(see Figure 2). The Man
oi
test is accomplished by
connecting the
oi
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 emitters. If the resulting signal meets
the test criteria, indicating that greater than half of the
detection range remains, the Alarm output 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
Mag
oi
or Man
oi
switch.
NOTE
Refer to Appendix A for FM verification of the
oi
function.
COMMUNICATION
The X3302 is furnished with an RS-485 interface for
communicating status and other information with
external devices. The RS-485 supports MODBUS
protocol, with the detector configured as a slave
device.
For HART communication, connect a HART communicator
across a 250 ohm resistor in the 0-20 mA loop.
NOTE
The EQP model uses LON/SLC communication.
RS-485 and HART communication are not
available on the EQP model.
DATA LOggINg
Data logging capability is also provided. Status
conditions such as normal, power down, general
and
oi
faults, 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 Inspector Connector accessory,
RS-485, or the EQP Controller.
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.
DETECTOR SENSITIvITy LEvELS
There are four factory configured sensitivity levels
available for the X3302 Flame Detector:
Very High, High, Medium, and Low.
The following criteria should be considered when
choosing a sensitivity level for the intended application:
• Detector placement
• Speed of response based on fuel type and fire size
(see Appendix A for response times)
• Distance between the hazard and the flame
detector
Recommended sensitivity guidelines are as follows:
Very High:
Aerospace, Hydrogen Storage
High:
Fertilizer (indoor), Refrigerants,
Compressors, Battery Manufacturing
Medium:
General Duty, Fertilizer (outdoor),
Ammonia,
Refrigerants
Low:
Hydrogen Fueling Stations, Turbine
Enlcosures
Additional information on X3302 Flame Detector
performance results and sensitivities can be found in
Appendix A, the FM Approval and Performance Report.
Consult the factory with any questions on how to choose
the optimum sensitivity level for the intended application.