Spectrex 20/20SI Triple IR (IR3) Flame Detector - Manual (Page 43)

Spectrex Inc. - SharpEye TM IR3 Flame Detector Manual – TM 20/20I, Rev. (6) August 2004
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7.4.1 Manual BIT Test
Important Note!
If SW1 switches 4 and 5 are in their “ON” position the Alarm, Accessory Relays
and 4-20mA Output will be activated during a manual BIT, therefore, automatic
extinguishing systems or any external devices that may be activated during BIT
must be disconnected.
1
Verify that the detector is operated properly.
2 Initiate manual BIT. After a few seconds the following occurs: Alarm Relay
will be activated and the 4-20mA output turns to 15mA for 3 seconds (only if
SW1-4 is ON). Accessory Relay will be activated and the 4-20mA output
turns to 10mA for 3 seconds (only if SW1-5 is ON). The 2 LEDs should be
ON. Fault Relay will stay active during the test.
7.4.2 Testing with fire simulator
This test is produced to simulate an exposure of the detector to a real fire
condition. The detector is exposed to the radiation in the specified detection level.
As a result the detector must generate a Fire Alarm signal.
Important Note!
If the detector is exposed to a fire simulator, the Alarm and Accessory Relays and
4-20mA will be activated during the simulation. Therefore, automatic extinguishing
systems or any external devices, which may be activated during this process,
must be disconnected.
1 Apply power to the system and wait up to 60 seconds for turning of the
detector to normal state. Power led turns on. If the detector is on, skip this
step.
2 Aim the Spectrex Fire Simulator Model 20/20-310 to the target point of the
detector (see Fig. 22), in a way that the radiation emitted by it is facing
directly towards the detector. (See appendix E)
3 Press the operation button once. After few seconds the Alarm LED should be
on for few seconds. The 4-20mA output should turn to 15mA for a few
seconds and then to return to 5mA. The Alarm Relay should also turn on to
this period. The Accessory Relay should respond in parallel to the Alarm
Relay if SW1-4 is OFF.
This completes the installation procedure. The detector and system are now ready
for operation.